Explore topic-wise InterviewSolutions in Current Affairs.

This section includes 7 InterviewSolutions, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.

1.

Assertion : K_w increases with increase in temperature. Reason : Concentration of H_3O+ and OH^- increases.

Answer»

(A) and ( R) are TRUE and ( R) is the correct explanation of (A)
Both (A) and ( R) are true but ( R) does not EXPLAIN (A)
(A ) is true but (R ) is false
Both (A) and ( R) are false

Answer :A
Discussion
2.

Assertion: K_(p)=K_(c) for all reaction. Reason: At constnat temperatue, the pressure of the gas is proportional to its concentration.

Answer»

If both assertin and REASON are TRUE and the reason is the CORRECT EXPLANATION of the assertion.
If both assertin and reason are true but reason is not the correct explanation of the assertion.
If assertin is true but reason is false.
If the assertion and reason both are false.

Discussion
3.

Assertion: KMnO_(4) is purple in colour due to charge transfer . Reason :There is no electron present in d-orbitals of maganese in MnO_(4)^(-))

Answer»

If both assertion and reason are true and the reason is the CORRECT explanation of assertion
If both assertion and reason are true and the reason is not the correct explanation of assertion
If assertion is FALSE but reason is true
If assertion is true but the reason is false

Answer :B
Discussion
4.

Assertion: KMnO_(4) has different equivalent wieghts in acid, neutral or alkaline medium. Reason: In different, change in oxidation number shown by maganese is altogether different.

Answer»

If both assertion and reason are TRUE and the reason is the CORRECT EXPLANATION of assertion
If both assertion and reason are true and the reason is not the correct explanation of assertion
If assertion is FALSE but reason is true
If assertion is true but the reason is false

Solution :
Discussion
5.

Assertion : Ketones are not easily oxidised Reason : The oxidation of unsymmetrical ketones is governed by Popoff's rule

Answer»

(A) and ( R) are true and ( R) is the CORRECT EXPLANATION of (A)
Both (A) and ( R) are true but ( R) does not explain (A)
(A) is true but ( R) is FALSE
Both (A) and ( R) are false

ANSWER :B
Discussion
6.

Assertion: KCN reacts with methyl chloride to give methyl isocyanide. Reason: CN^(-) is an ambident nucleophile.

Answer»

Assertion and reason both are correct and reason is correct explanation of assertion.
Assertion and reason both are wrong statements.
Assertion is correct but reason is wrong statement.
Assertion is wrong but reason is correct statement.

Solution :Correct assertion. HCN reacts with METHYL chloride to a give a MIXTURE of methyl CYANIDE and methyl isocyanide in which methyl cyanide PREDOMINATES.
Discussion
7.

Assertion: Ketones are less reactive than aldehydes. Reason: Ketones do not give Schiff's test.

Answer»

If both assertion and reason are TRUE and the reason is the CORRECT explanation of the assertion
If both assertion and reason are true but reason is not the correct explanation of the assertion
If assertion is true but reason is FALSE
If assertion is false but reason is true

Solution :The positive INDUCTIVE effect of two alkyl groups in ketones makes the carbon atom LESS positive and makes it less reactive in comparison to aldehydes.
Discussion
8.

Assertion K_2[Ni("EDTA") ] is more stable thanK_3[Al(C_2O_4) _3] Reason: Ni is a transition element whereas A1 is non-transition element.

Answer»

Both assertion and REASON are true and the reason is the CORRECT explanation of the ASSETION
Both the assertion and reason are true but the reason is not the correct explanation of the assertion.
Assertion is true but reason is false
Both assertion and reason are false.

Answer :B
Discussion
9.

Assertion: K_(2)Cr_(2)O_(7) is used as a primary standard in volumetric analysis. Reason: It has a good solubility in water.

Answer»

If both ASSERTION and REASON are true and the reason is the CORRECT explanation of the assertion.
if both assertion and reason are true but reason is not the correct explanation of the assertion.
If assertion is true but reason is false.
If the assertion and reason both are false.

Solution :Because it is not DELIQUESCENT.
Discussion
10.

Assertion. K_(2)Cr_(2)O_(7) is used as primary standard in volumetric analysis. Reason. It hasa good solubilityin water.

Answer»

Solution :CORRECT R. `K_(2)Cr_(2)O_(7)` is not MUCH SOLUBLE in cold water. HOWEVER , it is obtained in pure stateandisnot hygroscopic in nature.
Discussion
11.

Assertion: K, Rb and Cs form superoxides. Reason: The stability of the superoxides increases from 'K' to 'Cs' due to decrease in lattice energy.

Answer»

If both assertion and Reason are true and the Reason is the correct explanation of the assertion.
If both assertion and Reason are true but the reason is not the correct explanation of the assertion
If assertion is true but reason is false
If both assertion and reason are false.

Solution :Superoxides are the species having an O-O bond and O in an OXIDATION state of `-(1)/(2)` (superoxide ION is `O_(2)^(-)`), Usually these are formed by active metals such as `KO_(2),RbO_(2)` and `CsO_(2)`. For the salts of larger anions (like `O_(2)^(-)`), lattice energy increases in a group. since, lattice energy is the DRIVING force for the formation of an ionic compound and its stability the stability of the superoxides from 'K' to 'Cs' also increases.
Discussion
12.

Assertion: K^(+) and NH_(4)^(+) ions have many similarities in their test Reason:Radius of K^(+) is almost equal to radius NH_(4)^(+)

Answer»

If both assertion and reason are true and the reason is the CORRECT EXPLANATION of assertion
If both assertion and reason are true and the reason is not the correct explanation of assertion
If assertion is false but reason is true
If assertion is true but the reason is false

Solution :IONICRADIUS of `NH_(4)^(+)` is almost equal to ionic RADIUS of `K^(+)`
Discussion
13.

Assertion: IUPAC name of the compound CH_(3)-underset(CH_(3))underset(|)(C)H-O-CH_(2)-CH_(2)-CH_(3) is Ethoxy-2-methylethane. Reason: In IUPAC nomenclature, ether is regarded as hydrocarbon derivative in which a hyddrogen atom is replaced by -OR or -OAr group [where R=alkyl group and Ar=aryl group].

Answer»

Assertion and reason both are correct and reason is correct EXPLANATION of assertion.
Assertion and reason both are WRONG statement.
Assertion is correct statement but reason is wrong statement.
Assertion is wrong statement but reason is correct statement.

Solution :Correct assertion. The IUPAC name of the compound.
`CH_(3)-underset(CH_(3))underset(|)(C)H-O-CH_(2)CH_(2)CH_(3)` is 1-(2-Propoxy)propane.
Discussion
14.

Assertion: K and Cs are sued in photoelectrical cells. Reason: K and Cs emit electrons on exposure to light.

Answer»

if both assertion and reason are TRUE and the reason is the CORRECT explanation of the assertion.
If both assertion and reason are true but reason is not the correct explanation of the assertion.
If assertion is true but reason is false
If the assertion and reason both are false.

Solution :K and Cs emit electrons on EXPOSURE to light hence, both are used in photoelectric cells. Here, assertion and reason are true and reason is a correct explanation.
Discussion
15.

Assertion: IUPAC name of K_3[Fe(CN)_6] is potassium hexacyanoferrate (II) Reason: K_3[Fe(CN)_6]is commonly called potassium ferricyanide

Answer»

Both ASSERTION & Reason are true ,Reason is the correct explanation of Assertion
Both Assertion & Reason are true, Reason is not correct explanation of Assertion
Assertion is true , Reason is FALSE
Assertion is false , Reason is false

ANSWER :D
Discussion
16.

Assertion: Isotonic solutions do not show osmosis. Reason:Isotonic solutions have equal osmotic pressure.

Answer»

Both Assertion and Reason are TRUE and Reason is the correct EXPLANATION of Assertion
Both Assertion and Reason are true and Reason is not the correct explanation of Assertion
Assertion is true but Reason is FALSE
Both Assertion and Reason are false

Answer :A
Discussion
17.

Assertion : Isotonic solution do not show the phenomenon of osmosis. Reason : Isotonic solution have equal osmotic pressure.

Answer»

If both assertion and REASON are true and the reason is the correct EXPLANATION of the assertion
If both the assertion and reason are true but reason is not the correct explanation of the assertion
If assertion is true but reason is false
If assertion is reason both are false.

Solution :It is true that ISOTONIC solution doesn't SHOW the phenomenon of osmosis.Isotonic solution are those solution which have same osomotic pressure.Here both assertion and reason are true but reason is not correct explanation.
Discussion
18.

Assertion : Isotonic solution do not show the phenomenon of osmosis. Reason : Isotonic solutions have equal osmotic pressure.

Answer»

If both ASSERTION and reason are true and the reason is the CORRECT explanation of the assertion.
If both assertion and reason are true but reason is not the correct explanation of the assertion.
If assertion is true but reason is false.
If the assertion and reason both are false.

Solution :It is true that isotonic solution doesn't SHOW the phenomenon of osmosis. Isotonic solutions are those solution which have same osmotic pressure. Here both assertion and reason are true but reason is not correct explanation.
Discussion
19.

Assertion Istonic solution donot show any osmosis when placed side by side. Reson : Isotnic solutions have same solute concentration.

Answer»

If both ASSERTION are reason are correct and reason is correct explanation for assertion.
If both assertion and reason are CORRCT but reason is not correct explanation for assertion.
If assertion is corrct but reason is incorrect.
If assertion and reason both are incrrect.

SOLUTION :Correct Reason. ISOTONIC solution have same molar CONCENTRATION of the solute.
Discussion
20.

Assertion. Isoelectric point is the pH at which colloidal particles can move towards either of the electrodes. Reason. At the isoelectirc point, colloidal particles may carry positive or negative charge.

Answer»

If both ASSERTION and reason are ture, and reason is the trure EXPLANATION of the assertion.
If both assertion and reason are true, but reason is not the true explanation of the assertion.
If assertion is true, but reason is FALSE.
If both assertion and reason false.

SOLUTION :Correct A. ISOELECTRIC points is the pH at which the colloidal particles fo not move towards cathode or anode.
Correct R. At the isoelectric point, colloidal particles do not carry any charge.
Discussion
21.

Assertion : isotonic solution do not show the phenomenon of osmosis. Reason : Isotonic solution have equal osmotic pressure

Answer»

If both the ASSERTION and REASON are true and reason is a true explanation of the assertion.
If both the assertion and reason are true but reason is not the correct explanation of the assertion
If assertion is true but reason is false
If assertion is false but reason is true.

SOLUTION :It is true that isotonic solution doesn't show the PHENOMENON of osmosis.Isotonic solution are those solution which have same osomotic pressure.Here both assertion and reason are true but reason is not correct explanation.
Discussion
22.

Assertion : is named as tetrakis (ethylene- diammine) mu-"hydroxo"-mu-"imido dicobalt (III) ion". Reason : In naming polynuclear complexes i.e., containing two or more metal atoms joined by bridging ligands, the word mu is added with hyphen before the nane of such ligands.

Answer»

If both ASSERTION and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false.

Solution : is named as tetrakis (ethylenediammine)-`mu`-hydroxo-`mu`-imido dicobalt (III) ion. For more than one bridging group the WORD u is repeated before cach bridging group.
Discussion
23.

Assertion: is less acidic than Reason: -F exerts better+mesomeric effect than -Cl.

Answer»

If both assertion and REASON are TRUE and the Reason is the correct explanation of the assertion.
If both assertion and Reason are true but the reason is not the correct explanation of the assertion
If assertion is true but reason is false
If both assertion and reason are false.

Solution :`-F` has STRONGER +M effect than -CL, thus,

is less ACIDIC than
Discussion
24.

Assertion : Ionisation enthalpy is always negative. Reason : Energy is always released when electrons are removed.

Answer»

If both assertion and REASON are TRUE and the reason is the correct explanation of the assertion
If both assertion and reason are true but reason is not a correct explanation of the assertion
If assertion is true but reason is false
If the assertion and reason both are false

Solution :Both assertion and reason are false.
Ionisation ENTHALPIES are always positive. Energy is always absorbed when ELECTRONS are removed from an atom.
Discussion
25.

Assertion : Ionic reactions are not instantaneous. Reason : Oppositely charged ions exert strong forces.

Answer»

If both assertion and reason are TRUE and reason is the correct explanation of the assertion
If both assertion and reason aretrue but reason is not the correct explanation is true but reason is false.
If the assertion and reason both are false.
If assertion is false but reason is true

Solution :It is fact that ionic REACTIONS are instantaneous due to the fact that oppositely charged ions exert STRONG forces and combine IMMEDIATELY.
Discussion
26.

Assertion : Insulin is a glubular protein. Reason : Gloubular proteins are water soluble.

Answer»

If both ASSERTION and reason are TRUE , and is the true explanation of the assertion.
If both assertion and reason are true, but reason is not the true explanation of the assertion.
If ASSERATION is true , but reason is FALSE.
If both assertion and reason are false.

ANSWER :A
Discussion
27.

Assertion: Intermolecular dehydration is not useful for the perparation of unsymmetrical ethers from primary alcohols Reason: The reaction leads to a mixture of products.

Answer»

Assertion is TRUE, Reason is true, Reason is a CORRECT explanation for Assertion
Assertion is true, Reason is true, Reason is not a correct explanation for Assertion
Assertion is true, Reason is false
Assertion is false, Reason is true

Answer :A
Discussion
28.

Assertion :Iodination of alkanes is reversible Reason:Iodination is carried out in presence of iodic acid

Answer»

If both assertion and reason are true and the reason is the correct explanation of the assertion
If both assertion and reason are true butreason is not the correct explanation of the assertion
if assertion is true but reason is false
If the assertion and reason both are false

Solution :Iodination is REVERSIBLE since FORMED HI is a strong reducing agent and REDUCES the ALKYL iodide back to alkane.
`CH_4+I_2 hArr CH_3I+HI`
Discussion
29.

Assertion : Instantaneous rate of reaction is equal to dx/dt . Reason : It is the rate of reaction at any particular instant of time

Answer»

If both assertion and reason are true and the reason is the correct explanation of the assertion
If both assertion and reason are true but reason is not the correct explanation of the assertion
If assertion is true but reason is FALSE
If assertion and reason both are false .

Solution :Instantaneous rate of reaction is EQUAL to SMALL change ini concentration (dx) during a small interval of TIME (DT) at that particular instant of time divided by the time interval .
Discussion
30.

Assertion Increasing temperature of a volatile liquid increases itsvapour pressure. Reason Increase in temperatureincreases the average kinetic energy of molecules in the vapour phase hence they collide to the surface of liquid with greater force.

Answer»

Both assertion and reason are CORRECT and reason is the correct EXPLANATION of the assertion,
Both assertion and reason are correct but reason is not the correct explanation of assertion.
Assertion is correct but reason is WRONG.
Assertion is wrong but reason is correct.

Answer :B::C::D
Discussion
31.

Assertion: Indigo is an indigoid dye. Reason: Indigo contains an azo (-N=N-) group

Answer»

Both A and R and true and R is the CORRECT expalantion of A
Both A and R are true but R is not a correct explanation of A
A is true but R is false
A is false but R is true

ANSWER :C
Discussion
32.

Assertion. Increasing pressure on pure water decreases its freezing point. Reason. Density of water is maximum at 273 K.

Answer»

If both ASSERTION and reason are true, and reason is the true explanation of the assertion.
If both assertion and reason are true, but reason is not the true explanation of the assertion.
If assertion is true, but reason is false.
If both assertion and reason are false.

Solution :Correct R. Density of WATER is maximum at `277K(4^(@)C)`.
Discussion
33.

Assertion: Increasing order of covalent character among given compounds is HgCl_(2)ltCdCl_(2)ltZnCl_(2) Reason: Order of size of cations is Zn^(2+)ltCd^(2+)ltHg^(2+) .

Answer»

If both ASSERTION and REASON are TRUE and the reason is the CORRECT explanation of assertion
If both assertion and reason are true and the reason is not the correct explanation of assertion
If assertion is false but reason is true
If assertion is true but the reason is false

Answer :D
Discussion
34.

Assertion : Increase in temperature, decreases conductance Reason : This is due to the increase in the attractive forces between the oppositely charged ions

Answer»

(A) and (R) are true and (R) is the CORRECT explanation of (A)
Both (A) and (R) are true but (R) does not EXPLAIN (A)
(A) is true but (R) is false
Both (A) and (R) are false

Answer :D
Discussion
35.

Assertion:Increase in temperature increases vapour pressure of a liquid Reason :Volume of a solution increases by increasing the temperature.

Answer»

Both Assertion and REASON are true and Reason is the CORRECT explanation of Assertion
Both Assertion and Reason are true and Reason is not the correct explanation of Assertion
Assertion is true but Reason is FALSE
Both Assertion and Reason are false

ANSWER :B
Discussion
36.

Assertion : Increase in temperature, increases chemisorption first and then decreases Reason : Due to the formation of a activated complex followed by desorption.

Answer»

(A) and (R) are true and (R) is the CORRECT explanation of (A)
Both (A) and (R) are true but (R) does not explain (A)
(A) is true but (R) is false
Both (A) and (R) are false

Answer :A
Discussion
37.

Assertion: In vulcanisation of rubber, sulphur cross links are introduced Reason: Vulcanisation is a free radical initiated chian reaction.

Answer»

If both assertion and reason are true and the reason is the correct explanation of the assertion.
If both assertion and reason are true but reason is not the CORRET explanation of the assertion.
if assertion is true but reason is FALSE
if the assertion and reason both are false

Solution :Vulcanisation is a process of teating natural rubber with SULPHUR or some compounds of sulphur under HEAT so as to modify its properties. This cross-linking give mechanical strength to the rubber.
Discussion
38.

Assertion: In vulcanisation of rubber , sulphur cross links are introduced. Reason: Vulcanisation is a free radical intiated chain reaction.

Answer»

If both assertion and reason are trueand reason is the CORRECT explanationof assertion .
If both assertion and reason are true but reason is not the correct explanationof assertion .
If assertion is true but reason is false.
If both assertion and reason are false.

SOLUTION :Vulcanisation is a process of treating natural rubber with sulphur or some compounds of sulphur under heat so as to modify its properties. This corss-linking gives MECHANICAL STRENGTH to the rubber .
Discussion
39.

Assertion: In the reaction of but-1-ene with HBr, 1-bromobutane is obtained in the presence of a peroxide. Reason: The reaction involves the formation of a primary free radical.

Answer»

If both assertion and REASON are CORRECT and reason is correct explanation for assertion
If both assertion and reason are correct but reason is not correct explanation for assertion.
If assertion is correct but reason is incorrect.
if both assertion and reason are incorrect.

Solution :Correct reason. The REACTION invovles the formation of a secondary free RADICAL.
Discussion
40.

Assertion: In the reaction N_(2) + 3H_(2) rarr 2NH_(3), the rate of reaction is different in terms of N_(2), H_(2) and NH_(3). Reason: Rate of disapperenace of N_(2) and H_(2) and rate of formation of NH_(3) are not equal to each other.

Answer»

If both ASSERTION and reason are TRUE and the reason is the CORRECT EXPLANATION of the assertion.
If both assertion and reason are true but the reason is not the correct explanation of the assertion.
If assertion is true but reason is FALSE.
If assertion is false but reason is true.

Solution :Correct statement -I: The rate of reaction is same in terms of different reactants and products.
Discussion
41.

Assertion: In the reaction of tert-butyl bromide with aq. KOH, rate becomes double by increasing the concentration of both aq. KOH and tert-butyl bromide Reason: Rate of reaction is, rate = kſtert butyl bromide) [OH^(-)].

Answer»

Assertion and REASON both are CORRECT statements and reason is correct explanation for assertion.
Assertion and reason both are correct statements but reason is not correct explanation for assertion.
Assertion is correct STATEMENT but reason is wrong statement.
Assertion is wrong statement but reason is correct statement.

Answer :B
Discussion
42.

Assertion : In the reaction , I_2+I^(-) to I_3, I_2 acts as a Lewis base. Reason : In this reaction I_2 donates a electron pair to I^-.

Answer»

(A) and ( R) are TRUE and ( R) is the correct EXPLANATION of (A)
Both (A) and ( R) are true but ( R) does not EXPLAIN (A)
(A ) is true but (R ) is false
Both (A) and ( R) are false

Answer :D
Discussion
43.

Assertion : In the reaction, (1)/(2)O_(2)+F_(2)rarrOF_(2) Fluorine is oxidant. Reason :- Fluorine cannot show positive oxidation state.

Answer»

If both Assertion & REASON are True & the Reason is a correct EXPLANATION of the Assertion.
If both Assertion & Reason are True but Reason is not a correct explanation of the Assertion.
If Assertion is True but the Reason is False.
If both Assertion & Reason are False.

Answer :B
Discussion
44.

Assertion : In the presence of alkalineKMnO_(4) 4-methylacetophenone is oxidised to benzoic acid. Reason : Keto group is oxidised to -COOH group.

Answer»

If both assertion and REASON are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.

Solution :Alkaline `KMnO_(4)` will OXIDISE both, `-CH_(3) and -COCH_(3)` GROUPS to `-COOH` group.
HENCE benzene-1, 4-dicarboxylic acid (terephthalic acid) will be formed.
Discussion
45.

Assertion : In the manufacturing of iron from hematite, silicon dioxide is added as flux. Reason : Lime stone is used as acidic flux in many case.

Answer»

Both (A) and (R ) are TRUE and (R ) is the CORRECT EXPLANATION of (A).
Both (A) and (R ) are true and (R ) is not the correct explanation of (A).
(A) true but (R ) false.
Both (A) and (R ) are false.

Answer :D
Discussion
46.

Assertion In the equation HCl+H_(2)OhArrH_(3)O^(+)+Cl^(-) HCl is a strong acid and Cl^(-) is a weak base while in the equation CH_(3)COOH+H_(2)OhArrCH_(3)COO^(-)+H_(3)O^(+) CH_(3)COOU is a weak acid and CH_(3) and CH_(3)COO^(-)is a strong base. Reason The stronger an acid, the weaker must be its base and vice-versa.

Answer»

Both A and R are TRUE and R is the CORRECT EXPLANATION of A
Both A and R are true but R is not a correct explanation of A
A is true but R is false
Both A and R arefalse.

Answer :A
Discussion
47.

Assertion : In the electrolytic reduction of Al_(2)O_(3), cryolite is used. Reason : Cryolite is an ore of aluminium.

Answer»

If both assetion and reason are CORRECT, and reason is the CORRECT EXPLANATION of the ASSERTION
If both assertion and reason are CORRECT, but reason is NOT the CORRECT explanation of the assertion
If assertion is CORRECT but reason is INCORRECT
If assertion is INCORRECT but reason is CORRECT

Answer :B
Discussion
48.

Assertion: In the electrolysis of aqueous NaCl, Na is preferentially discharged at the mercury cathode forming sodium amalgam. Reason: It is due to the fact that hydrogen has high overvoltage at mercury cathode.

Answer»

If both assertion and REASON are TRUE, and reason is the true explanation of the assertion
if both assertion and reason are true, but reason is not the true explanation of the assertion.
if assertion is true, but reason is false.
If both assertion and reason are false.

Solution :R is the CORRECT explanation of A.
Discussion
49.

Assertion :In the brown ringtest for mixture through westart with Fe^(II)SO_(4) , we end upwith [Fe(H_(2)O)_(3)NO]SO_(4) inwhichiron is in the +1 oxidationstates Reasion : No transfers its odd electronsto iron (II)

Answer»

If both (A) and (B) are CORRECT and (R ) is the correct explqanation of (A)
If both (A) and (B) are correct but (R ) is not the correct explqanation of (A)
If (A) is correct ,but (R ) is INCORRECT
If (A) is incorrect ,but (R ) is correct

Answer :a
Discussion
50.

Assertion: In the electrolysis of aqueous NaCl, Na is preferentially discharged at mercury cathode forming sodium amalgam. Reason: It is due to the fact that hydrogen gas a high over voltage at mercury cathode.

Answer»

if both ASSERTION and reason are true and the reason is the correct explanation of the assertion.
If both assertion and reason are true but reason is not the correct explanation of the assertion.
If assertion is true but reason is false
If the assertion and reason both are false.

Solution :In the electrolysis of aq. NaCl, sodium is PREFERENTIALLY DISCHARGED at the mercury cathode forming sodium amalgam (Na-Hg) DUE to the fact that hydrogen has a HIGH over voltage at mercury cathode.
Discussion