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MCQOPTIONS
This section includes 11242 Mcqs, each offering curated multiple-choice questions to sharpen your Joint Entrance Exam - Main (JEE Main) knowledge and support exam preparation. Choose a topic below to get started.
| 3801. |
Beryllium and aluminum exhibit many properties which are similar. But the two elements differ in: |
| A. | Exhibiting amphoteric nature in their oxides |
| B. | Forming polymeric hydrides |
| C. | Forming covalent halides |
| D. | Exhibiting maximum covalence in compounds |
| Answer» C. Forming covalent halides | |
| 3802. |
Which one of the following orders presents the correct sequence of the increasing basic nature of the given oxides? |
| A. | \[A{{l}_{2}}{{O}_{3}}<MgO<N{{a}_{2}}O<{{K}_{2}}O\] |
| B. | \[Mg\,O\]\[<{{K}_{2}}O\]\[<\]\[A{{I}_{2}}{{O}_{3}}\]\[<N{{a}_{2}}O\] |
| C. | \[N{{a}_{2}}O\]\[<{{K}_{2}}O\]\[<MgO\]\[<\]\[A{{I}_{2}}{{O}_{3}}\] |
| D. | \[{{K}_{2}}O\]\[<N{{a}_{2}}O\]\[<\]\[A{{I}_{2}}{{O}_{3}}\]\[<MgO\] |
| Answer» B. \[Mg\,O\]\[<{{K}_{2}}O\]\[<\]\[A{{I}_{2}}{{O}_{3}}\]\[<N{{a}_{2}}O\] | |
| 3803. |
In which of the following arrangements, the order is not correct according to the property indicated against it: |
| A. | Increasing size: \[A{{I}^{3+}}<M{{g}^{2+}}<N{{a}^{+}}<{{F}^{-}}\] |
| B. | Increasing \[I{{E}_{1}}:B<C<N<O\] |
| C. | Increasing \[E{{A}_{1}}:I<Br<F<CI\] |
| D. | Increasing metallic radius: \[Li<Na<K<Rb\] |
| Answer» C. Increasing \[E{{A}_{1}}:I<Br<F<CI\] | |
| 3804. |
Among \[A{{l}_{2}}{{O}_{3}}\],\[Si{{O}_{2}}\]\[{{P}_{2}}{{O}_{3}}\] and \[S{{O}_{2}}\] the correct order of acid strength is |
| A. | \[A{{l}_{2}}{{O}_{3}}<Si{{O}_{2}}<S{{O}_{2}}<{{P}_{2}}{{O}_{3}}\] |
| B. | \[Si{{O}_{2}}<S{{O}_{2}}<A{{l}_{2}}{{O}_{3}}<{{P}_{2}}{{O}_{3}}\] |
| C. | \[S{{O}_{2}}\]\[<{{P}_{2}}{{O}_{3}}\]\[<Si{{O}_{2}}\]\[<\]\[A{{l}_{2}}{{O}_{3}}\] |
| D. | \[A{{l}_{2}}{{O}_{3}}\]\[<Si{{O}_{2}}\]\[<{{P}_{2}}{{O}_{3}}\]\[<S{{O}_{2}}\] |
| Answer» E. | |
| 3805. |
Fluorine is the best oxidising agent because it has |
| A. | Highest electron affinity |
| B. | Highest \[{{E}^{0}}_{red}\] |
| C. | Highest \[{{E}^{0}}_{oxid}\], |
| D. | Lowest electron affinity |
| Answer» C. Highest \[{{E}^{0}}_{oxid}\], | |
| 3806. |
Which one of the following is expected to have largest size? |
| A. | \[{{F}^{-}}\] |
| B. | \[{{O}^{-2}}\] |
| C. | \[A{{I}^{+3}}\] |
| D. | \[{{N}^{-3}}\] |
| Answer» E. | |
| 3807. |
Ionic radii are |
| A. | Directly proportional to effective nuclear charge |
| B. | Directly proportional to square of effective nuclear charge |
| C. | Inversely proportional to effective nuclear charge |
| D. | Inversely proportional to square of effective nuclear charge. |
| Answer» D. Inversely proportional to square of effective nuclear charge. | |
| 3808. |
Second and successive electron affinity of an element |
| A. | is always successive (energy is released) |
| B. | is always positive (energy is absorbed) |
| C. | can be positive or negative |
| D. | is always zero |
| Answer» C. can be positive or negative | |
| 3809. |
\[I{{E}_{1}}\] and \[I{{E}_{2}}\] of Mg are 178 and 348 kcal \[mo{{l}^{\,-\,1}}\]. The energy required for the reaction \[Mg\xrightarrow{{}}M{{g}^{2+}}+2\,\,{{e}^{-}}\] is |
| A. | +170 kcal |
| B. | +526 kcal |
| C. | -170 kcal |
| D. | -526 kcal |
| Answer» C. -170 kcal | |
| 3810. |
Which of the following are isoelectronic species? \[\overset{\oplus }{\mathop{C{{H}_{3}}}}\,(I),\text{ }\overset{\Theta }{\mathop{N{{H}_{2}}}}\,(II),\text{ }{{\overset{\oplus }{\mathop{NH}}\,}_{4}}(III)\,\,and\,\text{ }N{{H}_{3}}(IV)\] |
| A. | II, III and IV |
| B. | I, II and III |
| C. | I, II and IV |
| D. | II and I |
| Answer» B. I, II and III | |
| 3811. |
Which of the following is an energy consuming process? |
| A. | \[{{O}_{(g)}}+{{e}^{-}}\to {{O}^{\odot }}_{(g)}\] |
| B. | \[N{{a}^{\oplus }}_{(g)}+{{e}^{-}}\to N{{a}_{(g)}}\] |
| C. | \[{{O}^{\odot }}_{(g)}+{{e}^{-}}\to {{O}^{2-}}_{(g)}\] |
| D. | \[{{O}^{2-}}_{(g)}\to {{O}^{\odot }}+{{e}^{-}}\] |
| Answer» D. \[{{O}^{2-}}_{(g)}\to {{O}^{\odot }}+{{e}^{-}}\] | |
| 3812. |
In a given energy level, the order of penetration effect of different orbitals is |
| A. | f<d<p<s |
| B. | s=p=d=f |
| C. | s<p<d<f |
| D. | p>s>d>f |
| Answer» B. s=p=d=f | |
| 3813. |
The correct arrangement of decreasing order of atomic radius among Na, K, Mg and Rb is |
| A. | Rb>Na>K>Mg |
| B. | K>Rb>Na>Mg |
| C. | Rb>K>Na>Mg |
| D. | Mg>Rb>K>Na |
| Answer» D. Mg>Rb>K>Na | |
| 3814. |
The size of species \[I,\text{ }{{I}^{\oplus }}\] and \[{{I}^{\Theta }}\] decreases in the order |
| A. | \[{{I}^{\oplus }}>{{I}^{\Theta }}>I\] |
| B. | \[{{I}^{\Theta }}>I>{{I}^{\oplus }}\] |
| C. | \[{{I}^{\Theta }}>{{I}^{\oplus }}>I\] |
| D. | \[I>{{I}^{\oplus }}>{{I}^{\Theta }}\] |
| Answer» C. \[{{I}^{\Theta }}>{{I}^{\oplus }}>I\] | |
| 3815. |
The ionic radii \[(in\text{ }\overset{\text{o}}{\mathop{\text{A}}}\,)\] of \[{{N}^{3-}},{{O}^{2-}}\] and \[{{F}^{-}}\] are respectively: |
| A. | 1.36, 1.40 and 1.71 |
| B. | 1.36, 1.71 and 1.40 |
| C. | 1.71, 1.40 and 1.36 |
| D. | 1.71, 1.36 and 1.40 |
| Answer» D. 1.71, 1.36 and 1.40 | |
| 3816. |
The charge/size ratio of a cation determines its polarizing power. Which one of the following sequences represents the increasing order of the polarizing power of the cationic species,\[{{K}^{+}},C{{a}^{2+}},M{{g}^{2+}}\] and \[B{{e}^{2+}}\]? |
| A. | \[M{{g}^{2+}}\]<\[B{{e}^{2+}}\]<\[{{K}^{+}}\]<\[C{{a}^{2+}}\] |
| B. | \[B{{e}^{2+}}\]<\[{{K}^{+}}\]<\[C{{a}^{2+}}\]<\[M{{g}^{2+}}\] |
| C. | \[{{K}^{+}}\]<\[C{{a}^{2+}}\]<\[M{{g}^{2+}}\]<\[B{{e}^{2+}}\] |
| D. | \[C{{a}^{2+}}\]<\[M{{g}^{2+}}\]<\[B{{e}^{2+}}\]<\[{{K}^{+}}\] |
| Answer» D. \[C{{a}^{2+}}\]<\[M{{g}^{2+}}\]<\[B{{e}^{2+}}\]<\[{{K}^{+}}\] | |
| 3817. |
The correct sequence of increasing covalent character is represented by |
| A. | \[LiCl<NaCl<BeC{{l}_{2}}\] |
| B. | \[BeC{{l}_{2}}<NaCl<LiCl\] |
| C. | \[NaCl<LiCl<BeC{{l}_{2}}\] |
| D. | \[BeC{{l}_{2}}<LiCl<NaCl\] |
| Answer» D. \[BeC{{l}_{2}}<LiCl<NaCl\] | |
| 3818. |
Which one of the following is used for the treatment of tuberculosis? |
| A. | Para-aminosalicylic acid |
| B. | isoniazid (INH) |
| C. | both [a] and [b] |
| D. | none of the above |
| Answer» D. none of the above | |
| 3819. |
An example of nonionic detergent is |
| A. | \[C{{H}_{3}}{{(C{{H}_{2}})}_{16}}\underset{\left( Polyethylene\text{ }glycol\text{ }stearate \right)}{\mathop{COO{{(C{{H}_{2}}C{{H}_{2}}O)}_{n}}C{{H}_{2}}C{{H}_{2}}OH}}\,\] |
| B. | \[{{C}_{11}}{{H}_{23}}C{{H}_{2}}OS{{O}_{3}}Na\] (Sodium lauryl sulphate) |
| C. | [Sodium p-(n-dodecyl) benzene sulphonate] |
| D. | Cetyltrimethyl ammonium chloride |
| Answer» B. \[{{C}_{11}}{{H}_{23}}C{{H}_{2}}OS{{O}_{3}}Na\] (Sodium lauryl sulphate) | |
| 3820. |
In the following sets of compounds, the one which contains only medicinal compounds is |
| A. | Alizarin, phenacetin, morphine |
| B. | Aspirin, gentian violet, phenolphthalein |
| C. | Boric acid, chloramphenicol, aspirin |
| D. | 9-Oxdecanoic acid, boric acid, morphine |
| Answer» D. 9-Oxdecanoic acid, boric acid, morphine | |
| 3821. |
Which of the following colour is imparted by alizarin dye in the presence of \[C{{r}^{3+}}\] ion? |
| A. | Violet |
| B. | Brown-red |
| C. | Pink |
| D. | Red |
| Answer» C. Pink | |
| 3822. |
Which of the following compounds is not an antacid? |
| A. | Aluminium hydroxide |
| B. | Cimetidine |
| C. | Phenelzine |
| D. | Ranitidine |
| Answer» D. Ranitidine | |
| 3823. |
Which of the following antibiotics is used to cure typhoid? |
| A. | Pencillin |
| B. | Chloramphenicol |
| C. | Tetracycline |
| D. | Streptomycin |
| Answer» C. Tetracycline | |
| 3824. |
Which of the following substances is added to soap to make it antiseptic? |
| A. | Iodine |
| B. | \[KMn{{O}_{4}}\] |
| C. | Bithionol |
| D. | \[C{{l}_{2}}\] |
| Answer» D. \[C{{l}_{2}}\] | |
| 3825. |
Oral contraceptive drugs contain |
| A. | Mestranol |
| B. | Norethindrone |
| C. | Both [a] and [b] |
| D. | none of these |
| Answer» D. none of these | |
| 3826. |
Phenacetin is an example of |
| A. | antibiotic |
| B. | antimalarial |
| C. | antipyretic |
| D. | all of these |
| Answer» D. all of these | |
| 3827. |
Detergents are prepared by the action of \[{{H}_{2}}S{{O}_{4}}\] followed by neutralization by starting with |
| A. | Cholesterol |
| B. | Lauryl alcohol |
| C. | Cyclohexanol |
| D. | \[p\]-Nitrophenol |
| Answer» C. Cyclohexanol | |
| 3828. |
Which of the following can possibly be used as analgesic without causing addiction and modification? |
| A. | Morphine |
| B. | N-Acetyl-para-aminophenol |
| C. | Diazepam |
| D. | Tetrahydrocatenol |
| Answer» C. Diazepam | |
| 3829. |
Which is the correct statement about birth control pills? |
| A. | Contain estrogen only |
| B. | Contain progesterone only |
| C. | Contain a mixture of estrogen and progesterone derivative |
| D. | Progesterone enhances ovulation |
| Answer» D. Progesterone enhances ovulation | |
| 3830. |
An ideal monatomic gas is taken round the cycle ABCD as shown in the figure. The work done during the cycle is |
| A. | \[pV\] |
| B. | \[2pV\] |
| C. | \[\frac{1}{2}pV\] |
| D. | zero |
| Answer» B. \[2pV\] | |
| 3831. |
\[{{C}_{2}}{{H}_{6}}(g)+3.5{{O}_{2}}(g)\to 2C{{O}_{2}}(g)+3{{H}_{2}}O(g)\]\[\Delta {{S}_{vap}}({{H}_{2}}O,\ell )={{x}_{1}}cal\,{{K}^{-1}}\] (boiling point = \[{{T}_{1}}\]) \[\Delta {{H}_{f}}({{H}_{2}}O,\ell )={{x}_{2}}\] \[\Delta {{H}_{f}}({{C}_{2}}O,)={{x}_{2}}\] \[\Delta {{H}_{f}}({{C}_{2}}{{H}_{6}},)={{x}_{4}}\] Hence, \[\Delta H\] for the reaction is |
| A. | \[2{{x}_{3}}+3{{x}_{2}}-{{x}_{4}}\] |
| B. | \[2{{x}_{3}}+3{{x}_{2}}-{{x}_{4}}+3{{x}_{1}}{{T}_{1}}\] |
| C. | \[2{{x}^{+}}+3{{x}_{2}}-{{x}_{4}}+3{{x}_{1}}{{T}_{1}}\] |
| D. | \[{{x}_{1}}{{T}_{1}}+{{x}_{2}}+{{x}_{3}}-{{x}_{4}}\] |
| Answer» C. \[2{{x}^{+}}+3{{x}_{2}}-{{x}_{4}}+3{{x}_{1}}{{T}_{1}}\] | |
| 3832. |
The enthalpies of combustion of carbon and carbon monoxide are -390 kJ and -278 kJ respectively. The enthalpy of formation of CO in kJ is |
| A. | 668 |
| B. | 112 |
| C. | -112 |
| D. | -668 |
| Answer» D. -668 | |
| 3833. |
The standard heat of formation of \[{{U}_{3}}{{O}_{8}}\] is -853.5 kcal/mol and the standard heat of the reaction \[3U{{O}_{2}}+{{O}_{2}}\to {{U}_{3}}{{O}_{8}}\] is -76.01 kcal. The standard heat of formation of \[U{{O}_{2}}\] is |
| A. | -1083 kJ \[mo{{l}^{-1}}\] |
| B. | -108.3 kJ \[mo{{l}^{-1}}\] |
| C. | -10.83 kJ \[mo{{l}^{-1}}\] |
| D. | -1.083 kJ \[mo{{l}^{-1}}\] |
| Answer» B. -108.3 kJ \[mo{{l}^{-1}}\] | |
| 3834. |
If 50 calories are added to a system and system does work of 30 calories on surroimdings, the change in internal energy of system is |
| A. | 20 cal |
| B. | 50 cal |
| C. | 40 cal |
| D. | 30 cal |
| Answer» B. 50 cal | |
| 3835. |
The value of enthalpy change (\[\Delta H\]) for the reaction \[{{C}_{2}}{{H}_{2}}OH(l)+3{{O}_{2}}(g)\to 2C{{O}_{2}}(g)+3{{H}_{2}}O(l)\]a \[27{}^\circ C\]is -1366.5 kJ\[mo{{l}^{-1}}\]. The value of internal energy change for the above reaction at this temperature will be |
| A. | -1371.5 kJ |
| B. | -1369.0 kJ |
| C. | -1364.0 kJ |
| D. | -1361.5 kJ |
| Answer» D. -1361.5 kJ | |
| 3836. |
Evaluate \[\Delta U\] at 500 K for the process \[Mg(s)+2HCl(g)\to MgC{{l}_{2}}(s)+{{H}_{2}}(g)\Delta H=-109\]kcal The volume change of solids to be ignored |
| A. | -204 kcal |
| B. | -108 kcal |
| C. | -9 kcal |
| D. | +9 kcal |
| Answer» C. -9 kcal | |
| 3837. |
For the process \[{{H}_{2}}O(I)\to {{H}_{2}}O(g)\] At \[T=100{}^\circ C\]and 1 atmosphere pressure, the correct choice is |
| A. | \[\Delta {{S}_{system}}>0\,and\,\Delta {{S}_{surroundings}}>0\] |
| B. | \[\Delta {{S}_{system}}>0\,and\,\Delta {{S}_{surroundings}}<0\] |
| C. | \[\Delta {{S}_{system}}<0\,and\,\Delta {{S}_{surroundings}}>0\] |
| D. | \[\Delta {{S}_{system}}<0\,and\,\Delta {{S}_{surroundings}}<0\] |
| Answer» C. \[\Delta {{S}_{system}}<0\,and\,\Delta {{S}_{surroundings}}>0\] | |
| 3838. |
For which change \[\Delta H\ne AE:\] |
| A. | \[{{H}_{2}}(g)+{{I}_{2}}(g)\rightleftarrows 2HI(g)\] |
| B. | \[HCl+NaOH\to NaCl+{{H}_{2}}O\] |
| C. | \[C(s)+{{O}_{2}}(g)\rightleftarrows C{{O}_{2}}(g)\] |
| D. | \[{{N}_{2}}(g)+3{{H}_{2}}(g)\to 2N{{H}_{3}}(g)\] |
| Answer» E. | |
| 3839. |
The incorrect expression among the following is |
| A. | \[\frac{\Delta {{G}_{system}}}{\Delta {{S}_{total}}}=-T\] |
| B. | in isothermal process,\[{{W}_{reversible}}=-nRTIn\frac{{{V}_{f}}}{{{V}_{i}}}\] |
| C. | \[In\,K=\frac{\Delta H-T\Delta {{S}^{o}}}{RT}\] |
| D. | \[K={{e}^{-\Delta {{G}^{o}}/RT}}\] |
| Answer» D. \[K={{e}^{-\Delta {{G}^{o}}/RT}}\] | |
| 3840. |
The enthalpy change states for the following processes are listed below:\[C{{l}_{2}}(g)\to 2Cl(g);\]\[242.3kJ\text{ }mo{{l}^{-1}}\]\[{{I}_{2}}(g)\to 2I(g);\]\[151.0kJ\text{ }mo{{l}^{-1}}\]\[ICl(g)\to I(g)+Cl(g);\]\[211.3kJ\text{ }mo{{l}^{-1}}\]\[{{I}_{2}}(s)\to {{I}_{2}}(g);\]\[62.76kJ\text{ }mo{{l}^{-1}}\]Given that the standard states for iodine chlorine are \[{{I}_{2}}(s)\] and\[C{{l}_{2}}(g)\], the standard enthalpy o formation for ICl (g) is: |
| A. | +244.8 kJ \[mo{{l}^{-1}}\] |
| B. | -14.6 kJ \[mo{{l}^{-1}}\] |
| C. | -16.8kJ \[mo{{l}^{-1}}\] |
| D. | + 16.8kJ \[mo{{l}^{-1}}\] |
| Answer» E. | |
| 3841. |
In an irreversible process taking place at constant P and T in which only pressure-volume work is being done by the system, the change in Gibbs energy (dG) and change in entropy (dS) satisfy the criterion |
| A. | \[{{(dS)}_{v,u}}=0,\,{{(dG)}_{T,P}}=0\] |
| B. | \[{{(dS)}_{v,u}}=0,\,{{(dG)}_{T,P}}=+ve\] |
| C. | \[{{(dS)}_{v,u}}=-ve,\,{{(dG)}_{T,P}}=-ve\] |
| D. | \[{{(dS)}_{v,u}}=+ve,\,{{(dG)}_{T,P}}=-ve\] |
| Answer» E. | |
| 3842. |
A vessel contains 100 litres of a liquid X. Heat is supplied to the liquid in such a fashion that heat given = change in enthalpy. The volume of the liquid increases by.2 litres. If the external pressure is 1 ami and 202.6 joules of heat were supplied, then [U= total internal energy] |
| A. | \[\Delta U=0,\,\Delta H=0\] |
| B. | \[\Delta U=+202.6J,\,\Delta H=+202.6J\] |
| C. | \[\Delta U=-202.6J,\,\Delta H=-202.6J\] |
| D. | \[\Delta U=0,\,\Delta H=+202.6J\] |
| Answer» E. | |
| 3843. |
If the internal energy of a system decreases by 128 J and at the same time it absorbs 56 J of heat, then |
| A. | work is done by the system equal to +71 J |
| B. | work is done by the system equal to -184 J |
| C. | work is done by the system equal to -71 J |
| D. | work is done by the system equal to 179 J |
| Answer» C. work is done by the system equal to -71 J | |
| 3844. |
Select the correct set of statement/s:I. Work done by the surrounding in case of infinite stage expansion is more than single stage expansionII. Irreversible work is always greater than reversible work (with sign)III. On an ideal gas in case of single stage expansion and compression system as well as surrounding are restored back to their original statesIV. If gas is in thermodynamic equilibrium the expansion is taken from state A to state B, by four successive single stage expansions. Then we can plot 4 points on the P-V indicator diagram. |
| A. | II |
| B. | I, II, III, IV |
| C. | II, IV |
| D. | I, II, IV |
| Answer» B. I, II, III, IV | |
| 3845. |
Work for the following process ABCD on a monoatomic gas is |
| A. | \[W=-2\,{{P}_{0}}{{V}_{0}}ln\,2\] |
| B. | \[W=-2\,{{P}_{0}}{{V}_{0}}(1+ln\,2)\] |
| C. | \[W=-\,{{P}_{0}}{{V}_{0}}(1+ln\,2)\] |
| D. | \[W=-\,{{P}_{0}}{{V}_{0}}ln\,2\] |
| Answer» B. \[W=-2\,{{P}_{0}}{{V}_{0}}(1+ln\,2)\] | |
| 3846. |
For the reaction, \[C+{{O}_{2}}\to C{{O}_{2}};\,\Delta H=-393\,J\] \[2Zn+{{O}_{2}}\to 2ZnO;\,H=-412\,J\] Which one is correct? |
| A. | Carbon can reduce ZnO to Zn |
| B. | Oxidation of carbon is not feasible |
| C. | Oxidation of Zn is not feasible |
| D. | Z'n liberates more heat than carbon during oxidation |
| Answer» E. | |
| 3847. |
A gaseous compound A reacts by three independent first order processes (as shown in figure) with rate constant \[2\text{ }\times {{10}^{-3}}\], \[3\text{ }\times {{10}^{-3}}\] and \[1.93\text{ }\times {{10}^{-3}}\]\[{{\sec }^{-1}}\] for products B, and D respectively. If initially pure A was taken in a cloy container with P = 8 atm, then the partial pressure of B (in atm) after 100 sec from start of experiment |
| A. | 0.288 |
| B. | 0.577 |
| C. | 1.154 |
| D. | none of these |
| Answer» D. none of these | |
| 3848. |
\[2A\to B+C\]. It would be a zero-order reaction when |
| A. | the rate of reaction is proportional to square of conc. of A |
| B. | the rate of reaction remains same at any conc. of A |
| C. | the rate remains unchanged at any conc. of B and |
| D. | the rate of reaction doubles if conc. of B is increase to double. |
| Answer» C. the rate remains unchanged at any conc. of B and | |
| 3849. |
In a first-order reaction, the concentration of the reactant decreases from 0.8 M to 0.4 M in 15 minutes. The time taken for the concentration to change from 0.1 M to 0.025 M is |
| A. | 60 minutes |
| B. | 15 minutes |
| C. | 7.5 minutes |
| D. | 30 minutes |
| Answer» E. | |
| 3850. |
The rate of the reaction, \[3A+2B\to \] Products is given by the rate expression: Rate k = [A]\[{{[B]}^{2}}\]. If A is taken in excess, the order of the reaction would be |
| A. | 3 |
| B. | 2 |
| C. | 1 |
| D. | 5 |
| Answer» C. 1 | |