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.

851.

Assertion: Potassium can be used in lassaigne test. Reason: Potassium reacts vigorously. [AIIMS 1997] 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
852.

Assertion            :     Colloidal sols scatter light while true solutions do not.   Reason              :     The particles in the colloidal sol more much slower than that of the true solution.

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
853.

Assertion: \[{{H}_{2}}S{{O}_{4}}\] cannot act as reducing agent. Reason: Sulphur cannot increase its oxidation number beyond + 6.  

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
854.

Assertion            :     Lyophilic colloids are called as reversible sols. Reason              :     Lyophilic sols are liquid loving.

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
855.

Assertion: The oxidation numbers are artificial, they are useful as a ?book-keeping? device of electrons in reactions. Reason: The oxidation numbers do not usually represent real charges on atoms, they are simply conventions that indicate what the maximum charge could possibly be on an atom in a molecule.       

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
856.

Assertion: Oxidation number of carbon in \[C{{H}_{2}}O\] is zero. Reason: \[C{{H}_{2}}O\] formaldehyde, is a covalent compound.            

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
857.

Read the assertion and reason carefully to mark the correct option out of the options given below: Assertion: Alkyl benzene is not prepared by Friedel-Crafts alkylation of benzene. Reason: Alkyl halides are less reactive than acyl halides. [AIIMS 2003]

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
858.

Assertion: Refining of petroleum involves fractional distillation. Reason: Fractional distillation involves repeated distillation. 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
859.

Assertion            :     ZSM ? 5 is used as a catalyst in petrochemical industries.      Reason              :     Zeolites are three dimensional network silicates in which some silicon atoms are replaced by aluminium atoms.

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
860.

Read the assertion and reason carefully to mark the correct option out of the options given below: Assertion: Pyrrole is an aromatic heterocyclic compound. Reason: It has a cyclic, delocalised \[6\pi \] electrons. [AIIMS 1995]

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
861.

Read the assertion and reason carefully to mark the correct option out of the options given below: Assertion: \[C{{H}_{4}}\] does not react with \[C{{l}_{2}}\] in dark. Reason: Chlorination of \[C{{H}_{4}}\]takes place in sunlight. [AIIMS 2001]

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
862.

Assertion: is 3-methyl butanoic acid. Reason: In poly functional group, the substituent should be given lower number than the principal functional group. 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
863.

Assertion            :     A reaction cannot become fast by itself unless a catalyst is added.    Reason              :     A catalyst always increases the speed of a reaction.

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
864.

Assertion: In a reaction \[Zn(s)+CuS{{O}_{4}}(aq)\to \] \[ZnS{{O}_{4}}(aq)+Cu(s)\], \[Zn\] is a reductant but itself get oxidized. Reason: In a redox reaction, oxidant is reduced by accepting electrons and reductant is oxidized by losing electrons.

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
865.

Read the assertion and reason carefully to mark the correct option out of the options given below: Assertion: Cyclolpentadienyl anion is much more stable than allyl anion. Reason: Cyclopentadienyl anion is aromatic in character.

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
866.

Read the assertion and reason carefully to mark the correct option out of the options given below: Assertion: Rates of nitration of benzene and hexadeuterobenzene are different. Reason: \[C-H\] bond is stronger than \[C-D\]bond

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
867.

Read the assertion and reason carefully to mark the correct option out of the options given below: Assertion: [10] Annulene is not aromatic though it contains Huckel number of \[\pi \] electrons. Reason: Steric interaction between internal hydrogens makes it non planar.

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
868.

Read the assertion and reason carefully to mark the correct option out of the options given below: Assertion: Tropylium cation is aromatic in nature Reason: The only property that determines its aromatic behaviour is its planar structure.

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
869.

Read the assertion and reason carefully to mark the correct option out of the options given below: Assertion: Conjugated polyenes containing odd number of carbon atoms is known as annulenes. Reason: General formula of annulenes is \[{{(CH=CH)}_{n}}\] where \[n=2,3,4\] etc.

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
870.

Assertion: \[CC{{l}_{4}}\] is not a fire extinguisher. Reason: \[CC{{l}_{4}}\] is insoluble in water. 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
871.

Assertion: Thiophene present in commercial benzene as an impurity can be removed by shaking the mixture with cold concentrated \[{{H}_{2}}S{{O}_{4}}\]. Reason: Thiophene is a heterocyclic aromatic compound. 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
872.

Assertion: During digestion with concentrated \[{{H}_{2}}S{{O}_{4}}\], nitrogen of the organic compound is converted into \[{{(N{{H}_{4}})}_{2}}S{{O}_{4}}\]. Reason: \[{{(N{{H}_{4}})}_{2}}S{{O}_{4}}\] on heating with alkali liberates \[N{{H}_{3}}\]. 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
873.

Assertion            :     According to Freundlich: \[\frac{x}{m}k.{{P}^{1/n}}\].  Reason              :     The isotherm shows variation of the amount of gas adsorbed by the adsorbent with temperature.  

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
874.

Assertion: \[HCl{{O}_{4}}\] is a stronger acid than \[HCl{{O}_{3}}\]. Reason: Oxidation state of \[Cl\] in \[HCl{{O}_{4}}\] is +VII and in \[HCl{{O}_{3}}\]+V. [AIIMS 2004]

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
875.

Read the assertion and reason carefully to mark the correct option out of the options given below: Assertion: Benzene reacts with \[C{{H}_{3}}COCl\] to give chlorobenzene. Reason: Chlorination is an electrophilic substitution reaction.

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
876.

Read the assertion and reason carefully to mark the correct option out of the options given below: Assertion: Activating groups are electron donors. Reason: Nitroso group is activating group.

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
877.

Read the assertion and reason carefully to mark the correct option out of the options given below: Assertion: Benzene forms benzene sulphonic acid with fuming \[{{H}_{2}}S{{O}_{4}}\] at high temperature. Reason: The attacking species is \[S{{O}_{3}}\].      

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
878.

Read the assertion and reason carefully to mark the correct option out of the options given below: Assertion: Nitration of toluene is easier than benzene. Reason: The methyl group in toluene is electron-releasing.

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
879.

Read the assertion and reason carefully to mark the correct option out of the options given below: Assertion: Benzene removes a butter stain from a table cloth. Reason: Butter has an affinity towards benzene.

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
880.

Read the assertion and reason carefully to mark the correct option out of the options given below: Assertion: Benzene is a solvent for the Friedel Craft?s alkylation of bromobenzene. Reason: Friedel Craft?s reaction is used to introduced on alkyl or acyl group in benzene nucleus.

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
881.

Read the assertion and reason carefully to mark the correct option out of the options given below: Assertion: Aryl halides are less reactive towards substitution of halogen atom. Reason: Halogens are \[o,p-\]directing in nature.

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
882.

Read the assertion and reason carefully to mark the correct option out of the options given below: Assertion: Acetylene reacts with sodamide to evolve \[{{H}_{2}}\] gas. Reason: Acetylene is a weaker acid than ammonia.

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
883.

Read the assertion and reason carefully to mark the correct option out of the options given below: Assertion: Propene reacts with \[HBr\] in presence of benzoyl peroxide to yield 2-bromopropane. Reason: In presence of peroxide, the addition of \[HBr\] to propene follows ionic mechanism.

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
884.

Read the assertion and reason carefully to mark the correct option out of the options given below: Assertion: Cyclobutane is less stable than cyclopentane Reason: Presence of bent bonds causes ?loss of orbital overlap?.      [AIIMS 1996]

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
885.

Assertion : Silica gel is used for drying air.   Reason : Silica gel adsorbs moisture from air.

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
886.

Assertion: Stannous chloride is a powerful oxidising agent which oxidises mercuric chloride to mercury. Reason: Stannous chloride gives grey precipitate with mercuric chloride, but stannic chloride does not do so. [AIIMS 2002]

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
887.

Assertion            :     Increase in surface area, increase in rate of evaporation.     Reason              :     Stronger the intermolecular attractive forces, fast is the rate of evaporation at a given temperature.

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
888.

Read the assertion and reason carefully to mark the correct option out of the options given below: Assertion: Ethene on treating with \[B{{r}_{2}}\] in presence of \[NaCl\] forms \[C{{H}_{2}}ClC{{H}_{2}}Br\] and \[C{{H}_{2}}Br-C{{H}_{2}}-Br\]. Reason: This addition involves the formation of free radicals.

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
889.

Assertion            :     Aqueous gold colloidal solution is red in colour. Reason              :     The colour arises due to scattering of light by colloidal gold particles.        [AIIMS 2004]

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
890.

Read the assertion and reason carefully to mark the correct option out of the options given below: Assertion: 2 Butanol on heating with \[{{H}_{2}}S{{O}_{4}}\] gives 1 butene and 2 butene. Reason: Dehydration of 2 butanol follows saytzeff rule.

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
891.

Assertion            :     The micelle formed by sodium stearate in water has \[-CO{{O}^{-}}\]groups at the surface. Reason              :     Surface tension of water is reduced by the addition of stearate.   [AIIMS 2003]

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
892.

Assertion            :     Physical absorption of molecules takes place on surface only. Reason              :     In this process, the bonds of the absorbed molecules are broken.  [AIIMS 2002]

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
893.

Read the assertion and reason carefully to mark the correct option out of the options given below: Assertion: The presence of \[A{{g}^{+}}\] enhances the solubility of alkenes in water. Reason: Alkenes are weakly polar in nature.

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
894.

Read the assertion and reason carefully to mark the correct option out of the options given below: Assertion: Knocking lowers the efficiency of the engine. Reason: Fuel with minimum knocking property is preferred.

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
895.

Assertion            :     Sky appears blue colour. Reason              :     Colloidal particles of dust scatter blue light.       [AIIMS 2000]

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
896.

Read the assertion and reason carefully to mark the correct option out of the options given below: Assertion: Freezing point of neopentane is more than n-pentane. Reason: Increase in Van der Waals forces increases freezing point.

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
897.

Assertion            :     \[N{{H}_{3}}\]absorb more readily over activated charcoal than \[C{{O}_{2}}\]. Reason              :     \[N{{H}_{3}}\]is non-polar. [AIIMS 2000]

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
898.

Assertion: Nucleophilic substitution reaction on an optically active alkyl halide gives a mixture of enantiomers. Reason: The reaction occurs 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» B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
Discussion
899.

Read the assertion and reason carefully to mark the correct option out of the options given below: Assertion: Neopentane forms only one monosubstituted compound. Reason: Neopentane has high bond energy.

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
900.

Assertion            :     A catalyst is more effective in finely divided form. Reason              :     Finely divided form has more surface area.       [AIIMS 1998]   

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.
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