Explore topic-wise MCQs in NEET.

This section includes 1187 Mcqs, each offering curated multiple-choice questions to sharpen your NEET knowledge and support exam preparation. Choose a topic below to get started.

801.

Which one of the following compounds will not be soluble in sodium bicarbonate?

A. 2, 4, 6 - Trinitrpphenol
B. Benzoicacid
C. o - Nitrophenol
D. Benzene sulphonic acid
Answer» D. Benzene sulphonic acid
Discussion
802.

Which are not cleaved by \[HI{{O}_{4}}\]?I. glycerolII. glycolIII. 1, 3 propenediolIV. methoxy-2-propanol

A. I, II, III, IV        
B. I, II
C. II, III                            
D. III, IV
Answer» E.
Discussion
803.

Amongst the following alcohols which would react fastest with cone. \[HCl\] and \[ZnC{{l}_{2}}\]?

A. pentanol           
B. 2-methyl butanol
C. 2-pentanol        
D. 2-methyl butan-2-ol
Answer» E.
Discussion
804.

Reagent used to convert allyl alcohol to acrolein is

A. \[Mn{{O}_{4}}\]                      
B. \[{{H}_{2}}{{O}_{2}}\]
C. \[Os{{O}_{4}}\]                       
D. \[KMn{{O}_{4}}\]
Answer» B. \[{{H}_{2}}{{O}_{2}}\]
Discussion
805.

Allyl phenyl ether can be prepared by heating:

A. \[{{C}_{6}}{{H}_{5}}Br+C{{H}_{2}}=CH-C{{H}_{2}}-ONa\]
B. \[C{{H}_{2}}=CH-C{{H}_{2}}-Br+{{C}_{6}}{{H}_{5}}ONa\]
C. \[{{C}_{6}}{{H}_{5}}-CH=CH-Br+C{{H}_{3}}-ONa\]
D. \[C{{H}_{2}}=CH-Br+{{C}_{6}}{{H}_{5}}-C{{H}_{2}}-ONa\]
Answer» B. \[C{{H}_{2}}=CH-C{{H}_{2}}-Br+{{C}_{6}}{{H}_{5}}ONa\]
Discussion
806.

Assertion: Copper reacts with HCl and liberates hydrogen. Reason: Hydrogen is present above Cu in the reactivity series. Read the assertion and reason carefully to mark the correct option out of the options given below:

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If the assertion and reason both are false.
E. If assertion is false but reason is true.
Answer» F.
Discussion
807.

Assertion: Vision is not a photochemical reaction. Reason: Halogenation of alkenes is a photochemical reaction. Read the assertion and reason carefully to mark the correct option out of the options given below:

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If the assertion and reason both are false.
E. If assertion is false but reason is true.
Answer» F.
Discussion
808.

Assertion: Equilibrium constant has meaning only when the corresponding balanced chemical equation is given. Reason: Its value changes for the new equation obtained by multiplying or dividing the original equation by a number.   Read the assertion and reason carefully to mark the correct option out of the options given below:

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If the assertion and reason both are false.
E. If assertion is false but reason is true.
Answer» B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
Discussion
809.

Assertion: The photochemical reactions \[{{H}_{2}}+C{{l}_{2}}\to 2HCl\] and \[{{H}_{2}}+B{{r}_{2}}\to 2HBr\] have equal quantum efficiencies. Reason: Both the reactions proceed by similar mechanism. Read the assertion and reason carefully to mark the correct option out of the options given below:

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If the assertion and reason both are false.
E. If assertion is false but reason is true.
Answer» E. If assertion is false but reason is true.
Discussion
810.

Assertion: According to Le-Chatelier's principle addition of heat to an equilibrium solid ⇌ liquid results in decrease in the amount of solid. Reason: Reaction is endothermic, so on heating forward reaction is favoured. Read the assertion and reason carefully to mark the correct option out of the options given below:

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If the assertion and reason both are false.
E. If assertion is false but reason is true.
Answer» C. If assertion is true but reason is false.
Discussion
811.

Assertion: Half-life period of a reaction of first order is independent of initial concentration. Reason: Half-life period for a first order reaction \[{{t}_{1/2}}=\frac{2.303}{K}\log 2.\] Read the assertion and reason carefully to mark the correct option out of the options given below:

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If the assertion and reason both are false.
E. If assertion is false but reason is true.
Answer» B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
Discussion
812.

Assertion: NaCl solution can be purified by passage of hydrogen chloride through brine. Reason: This type of purification is based on Le-Chaterlier's principle. Read the assertion and reason carefully to mark the correct option out of the options given below:

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If the assertion and reason both are false.
E. If assertion is false but reason is true.
Answer» D. If the assertion and reason both are false.
Discussion
813.

Assertion: Copper liberates hydrogen from a solution of dil. HCl. Reason: Hydrogen is below copper in the reactivity series. Read the assertion and reason carefully to mark the correct option out of the options given below:

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If the assertion and reason both are false.
E. If assertion is false but reason is true.
Answer» E. If assertion is false but reason is true.
Discussion
814.

Assertion: If \[{{Q}_{c}}\](reaction quotient)\[

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If the assertion and reason both are false.
E. If assertion is false but reason is true.
Answer» F.
Discussion
815.

Assertion: If the activation energy of a reaction is zero, temperature will have no effect on the rate constant. Reason: Lower the activation energy, faster is the reaction. Read the assertion and reason carefully to mark the correct option out of the options given below:

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If the assertion and reason both are false.
E. If assertion is false but reason is true.
Answer» C. If assertion is true but reason is false.
Discussion
816.

Assertion: Copper reacts with hydrochloric acid and liberates hydrogen from the solution of dilute hydrochloric acid. Reason: Hydrogen is below copper in the electrochemical series. Read the assertion and reason carefully to mark the correct option out of the options given below:

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If the assertion and reason both are false.
E. If assertion is false but reason is true.
Answer» E. If assertion is false but reason is true.
Discussion
817.

Assertion: On cooling a freezing mixture, colour of the mixture turns to pink from deep blue for a reaction.\[Co({{H}_{2}}O){{_{6}^{2+}}_{(aq)}}+4C{{l}^{-}}_{(aq)}\]⇌ \[CoCl{{_{4}^{2-}}_{(aq)}}+6{{H}_{2}}{{O}_{(l)}}\]. Reason: Reaction is endothermic so on cooling, the reaction moves to backward direction. Read the assertion and reason carefully to mark the correct option out of the options given below:

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If the assertion and reason both are false.
E. If assertion is false but reason is true.
Answer» B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
Discussion
818.

Assertion: If in a zero order reaction, the concentration of the reactant is doubled, the half-life period is also doubled.   Reason: For a zero order reaction, the rate of reaction is independent of initial concentration. Read the assertion and reason carefully to mark the correct option out of the options given below:

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If the assertion and reason both are false.
E. If assertion is false but reason is true.
Answer» C. If assertion is true but reason is false.
Discussion
819.

Assertion: \[Ni/N{{i}^{2+}}\,(1.0M)||A{{u}^{3+}}(1.0M)|Au\], for this cell emf is 1.75 V if \[E_{A{{u}^{3+}}/Au}^{o}=1.50\,\] and \[E_{N{{i}^{2+}}/Ni}^{o}=0.25V\]. Reason: Emf of the cell \[=E_{\text{cathode}}^{o}-E_{\text{anode}}^{o}\].        Read the assertion and reason carefully to mark the correct option out of the options given below:

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If the assertion and reason both are false.
E. If assertion is false but reason is true.
Answer» B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
Discussion
820.

Assertion: In an electrochemical cell anode and cathode are respectively negative and positive electrodes. Reason: At anode oxidation takes place and at cathode reduction takes place.            Read the assertion and reason carefully to mark the correct option out of the options given below:

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If the assertion and reason both are false.
E. If assertion is false but reason is true.
Answer» B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
Discussion
821.

Assertion: Galvanised iron does not rust. Reason: Zinc has a more negative electrode potential than iron.         [AIIMS 2005] Read the assertion and reason carefully to mark the correct option out of the options given below:

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If the assertion and reason both are false.
E. If assertion is false but reason is true.
Answer» B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
Discussion
822.

Assertion: An electrochemical cell can be set up only if the redox reaction is spontaneous. Reason: A reaction is spontaneous if free energy change is negative. Read the assertion and reason carefully to mark the correct option out of the options given below:

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If the assertion and reason both are false.
E. If assertion is false but reason is true.
Answer» C. If assertion is true but reason is false.
Discussion
823.

Assertion: Identification of cathode and anode is done by the use of a thermometer. Reason: Higher is the value of reduction potential, greater would be its reducing power. Read the assertion and reason carefully to mark the correct option out of the options given below:

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If the assertion and reason both are false.
E. If assertion is false but reason is true.
Answer» E. If assertion is false but reason is true.
Discussion
824.

Assertion: Zinc displaces copper from copper sulphate solution. Reason: The \[{{E}^{0}}\]of zinc is \[-0.76\ V\]and that of copper is \[+0.34\ V\]. Read the assertion and reason carefully to mark the correct option out of the options given below:

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If the assertion and reason both are false.
E. If assertion is false but reason is true.
Answer» B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
Discussion
825.

Assertion: Equivalent conductance of all electrolytes decreases with the increases in concentration. Reason: Lesser number of ions are available per gram equivalent at higher concentration. Read the assertion and reason carefully to mark the correct option out of the options given below:

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If the assertion and reason both are false.
E. If assertion is false but reason is true.
Answer» B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
Discussion
826.

Assertion: The equilibrium constant for the reaction\[CaS{{O}_{4}}.5{{H}_{2}}O(s)\]⇌\[CaS{{O}_{4}}.3{{H}_{2}}O(s)+2{{H}_{2}}O(g)\] is \[{{K}_{C}}=\frac{[CaS{{O}_{4}}.3{{H}_{2}}O]{{[{{H}_{2}}O]}^{2}}}{[CaS{{O}_{4}}.5{{H}_{2}}O]}\] Reason: Equilibrium constant is the ratio of the product of molar concentration of the substances produced to the product of the molar concentrations of reactants with each concentrations term raised to the power equal to the respective stoichiometric constant. Read the assertion and reason carefully to mark the correct option out of the options given below:

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If the assertion and reason both are false.
E. If assertion is false but reason is true.
Answer» F.
Discussion
827.

Assertion: Molecularity has no meaning for a complex reaction.  Reason: The overall molecularity of a complex reaction is equal to the molecularity of the slowest step. Read the assertion and reason carefully to mark the correct option out of the options given below:

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If the assertion and reason both are false.
E. If assertion is false but reason is true.
Answer» C. If assertion is true but reason is false.
Discussion
828.

Assertion: For a cell reaction\[Zn(s)+C{{u}^{2+}}(aq)\to \] \[Z{{n}^{2+}}(aq)+Cu(s)\]; at the equilibrium, voltmeter gives zero reading. Reason: At the equilibrium, there is no change in the concentration of \[C{{u}^{2+}}\]and \[Z{{n}^{2+}}\] ions. Read the assertion and reason carefully to mark the correct option out of the options given below:

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If the assertion and reason both are false.
E. If assertion is false but reason is true.
Answer» B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
Discussion
829.

Assertion: Auric chloride \[(AuC{{l}_{3}})\]solution cannot be stored in a vessel made of copper, iron, nickel, chromium, zinc or tin.    Reason: Gold is a very precious metal. Read the assertion and reason carefully to mark the correct option out of the options given below:

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If the assertion and reason both are false.
E. If assertion is false but reason is true.
Answer» C. If assertion is true but reason is false.
Discussion
830.

Assertion: One coulomb of electric charge deposits weight equal to the electrochemical equivalent of the substance. Reason: One Faraday deposits one mole of the substance. Read the assertion and reason carefully to mark the correct option out of the options given below:

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If the assertion and reason both are false.
E. If assertion is false but reason is true.
Answer» D. If the assertion and reason both are false.
Discussion
831.

Assertion: Ice ⇌water, if pressure is applied water will evaporate. Reason: Increase of pressure pushes the equilibrium towards the side in which number of gaseous mole decreases.  Read the assertion and reason carefully to mark the correct option out of the options given below:

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If the assertion and reason both are false.
E. If assertion is false but reason is true.
Answer» F.
Discussion
832.

Assertion: If \[\lambda _{N{{a}^{+}}}^{0}+\lambda _{C{{l}^{-}}}^{0}\] are molar limiting conductivity of the sodium and chloride ions respectively, then the limiting molar conducting for sodium chloride is given by the equation: \[\wedge _{NaCl}^{0}=\lambda _{N{{a}^{+}}}^{0}+\lambda _{C{{l}^{-}}}^{0}\].  Reason: This is according to Kohlrausch law of independent migration of ions. Read the assertion and reason carefully to mark the correct option out of the options given below:

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If the assertion and reason both are false.
E. If assertion is false but reason is true.
Answer» B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
Discussion
833.

Assertion: For a gaseous reaction, \[xA+yB\] ⇌ \[lC+mD,\ {{K}_{p}}={{K}_{C}}\]. Reason: Concentration of gaseous reactant is taken to be unity. Read the assertion and reason carefully to mark the correct option out of the options given below:

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If the assertion and reason both are false.
E. If assertion is false but reason is true.
Answer» E. If assertion is false but reason is true.
Discussion
834.

Assertion: When acidified zinc sulphate solution is electrolysed between zinc electrodes, it is zinc that is deposited at the cathode and hydrogen evolution does not take place. Reason: The electrode potential of zinc is more negative than hydrogen as the overvoltage for the hydrogen as the evolution on zinc is quite large. Read the assertion and reason carefully to mark the correct option out of the options given below:

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If the assertion and reason both are false.
E. If assertion is false but reason is true.
Answer» B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
Discussion
835.

Assertion: The resistivity for a substance is its resistance when its is one meter long and its area of cross section is one square meter. Reason: The SI uints of resistivity are ohm metre \[(\Omega \,m)\]and ohm centimeter \[(\Omega \ cm)\]. Read the assertion and reason carefully to mark the correct option out of the options given below:

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If the assertion and reason both are false.
E. If assertion is false but reason is true.
Answer» C. If assertion is true but reason is false.
Discussion
836.

Assertion: A large dry cell has high e.m.f. Reason: The e.m.f. of a dry cell is proportional to its size. Read the assertion and reason carefully to mark the correct option out of the options given below:

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If the assertion and reason both are false.
E. If assertion is false but reason is true.
Answer» E. If assertion is false but reason is true.
Discussion
837.

Assertion: The kinetic of the reaction\[mA+nB+pC\to \]\[m'X+n'Y+p'Z\]obeys the rate expression as\[\frac{dx}{dt}=k{{[A]}^{m}}{{[B]}^{n}}\]. Reason: The rate of the reaction does not depend upon the concentration of C. Read the assertion and reason carefully to mark the correct option out of the options given below:            

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If the assertion and reason both are false.
E. If assertion is false but reason is true.
Answer» B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
Discussion
838.

Assertion: K and Cs are used in photoelectric cells. Reason: K and Cs emit electrons on exposure to light. Read the assertion and reason carefully to mark the correct option out of the options given below:

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If the assertion and reason both are false.
E. If assertion is false but reason is true.
Answer» B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
Discussion
839.

Assertion: The value of K gives us a relative idea about the extent to which a reaction proceeds. Reason: The value of K is independent of the stochiometry of reactants and products at the point of equilibrium. Read the assertion and reason carefully to mark the correct option out of the options given below:

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If the assertion and reason both are false.
E. If assertion is false but reason is true.
Answer» D. If the assertion and reason both are false.
Discussion
840.

Assertion: Equilibrium constant for the reverse reaction is the inverse of the equilibrium constant for the reaction in the forward direction. Reason: Equilibrium constant depends upon the way in which the reaction is written. Read the assertion and reason carefully to mark the correct option out of the options given below:

A. If both assertion ad reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If the assertion and reason both are false.
E. If assertion is false but reason is true.
Answer» B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
Discussion
841.

Assertion: The rate of reaction is always negative. Reason: Minus sign used in expressing the rate shows that concentration of product is decreasing. Read the assertion and reason carefully to mark the correct option out of the options given below:

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If the assertion and reason both are false.
E. If assertion is false but reason is true.
Answer» E. If assertion is false but reason is true.
Discussion
842.

Assertion: In electrolysis, the quantity of electricity needed for depositing 1 mole of silver is different from that required for 1 mole of copper. Reason: The molecular weights of silver and copper are different Read the assertion and reason carefully to mark the correct option out of the options given below:

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If the assertion and reason both are false.
E. If assertion is false but reason is true.
Answer» C. If assertion is true but reason is false.
Discussion
843.

Assertion: Sodium ions are discharged in preference to hydrogen ions at a mercury cathode. Reason: The nature of the cathode can effect the order of discharge of ions.    Read the assertion and reason carefully to mark the correct option out of the options given below:

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If the assertion and reason both are false.
E. If assertion is false but reason is true.
Answer» B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
Discussion
844.

Assertion: \[{{K}_{p}}={{K}_{c}}\] for all reaction. Reason:  At constant temperature, the pressure of the gas is proportional to its concentration. Read the assertion and reason carefully to mark the correct option out of the options given below:

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If the assertion and reason both are false.
E. If assertion is false but reason is true.
Answer» F.
Discussion
845.

Assertion: The equilibrium constant is fixed and is the characteristic of any given chemical reaction at a specified temperature. Reason: The composition of the final equilibrium mixture at a particular temperature depends upon the starting amount of reactants. [AIIMS 2000] Read the assertion and reason carefully to mark the correct option out of the options given below:

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If the assertion and reason both are false.
E. If assertion is false but reason is true.
Answer» D. If the assertion and reason both are false.
Discussion
846.

Assertion: Instantaneous rate of reaction is equal to \[dx/dt\]. Reason: It is the rate of reaction at any particular instant of time. Read the assertion and reason carefully to mark the correct option out of the options given below:

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If the assertion and reason both are false.
E. If assertion is false but reason is true.
Answer» C. If assertion is true but reason is false.
Discussion
847.

Assertion: During test for nitrogen with Lassaigne extract on adding  solution sometimes a red precipitate is obtained. Reason: Sulphur is also present. [AIIMS 2001] Read the assertion and reason carefully to mark the correct option out of the options given below:

A.  If both assertion and reason are true and the reason is the correct explanation of the assertion.
B.  If both assertion and reason are true but reason is not the correct explanation of the assertion.
C.  If assertion is true but reason is false.
D.  If the assertion and reason both are false.
E.  If assertion is false but reason is true.
Answer» B.  If both assertion and reason are true but reason is not the correct explanation of the assertion.
Discussion
848.

Assertion: Equivalent weight of \[N{{H}_{3}}\] in the reaction \[{{N}_{2}}\to N{{H}_{3}}\] is 17/3 while that of \[{{N}_{2}}\] is 28/6. Reason: Equivalent weight =\[\frac{\text{Molecular weight}}{\text{number of }{{e}^{}}\text{lost or gained}}\].

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If the assertion and reason both are false.
E. If assertion is false but reason is true.
Answer» B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
Discussion
849.

Assertion: is less reactive  than towards reactions.Reason: Tertiary alkyl halides react predominantly by \[{{S}_{N}}1\] mechanism.Read the assertion and reason carefully to mark the correct option out of the options given below:

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If the assertion and reason both are false.
E. If assertion is false but reason is true.
Answer» F.
Discussion
850.

Assertion: is 3-methyl cyclopentene. Reason: In numbering, double bonded carbon atoms gets preference to the alkyl group in cycloalkenes. Read the assertion and reason carefully to mark the correct option out of the options given below:

A.  If both assertion and reason are true and the reason is the correct explanation of the assertion.
B.  If both assertion and reason are true but reason is not the correct explanation of the assertion.
C.  If assertion is true but reason is false.
D.  If the assertion and reason both are false.
E.  If assertion is false but reason is true.
Answer» B.  If both assertion and reason are true but reason is not the correct explanation of the assertion.
Discussion