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 : Pure N_(2) is formed from Ba(N_(3))_(2) Reason : Thermal decomposition of NaN_(3) is used to inflate the air bags used for safety devices in same cases.

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 explanation : `Ba(N_(3))_(2)` UPON thermal decompositiongives PURE `N_(2)`.
`Ba(N_(3))_(2) overset("heat")to Ba+3N_(2)`.
Discussion
2.

Assertion[Pt(NH_3) _2Cl_2] is optically inactive Reason: It has a plane o symmetry.

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 :A
Discussion
3.

Assertion : pure iron when heated in dry air is converted with a layer of rust. Reason : Rust has the composition Fe_(3)O_(4)

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.
Assertion is truebut reason is false.
Both assertion andreason are false.

Answer :D
Discussion
4.

Assertion : pure iron when heated in dry air in converted with a layer of rust. Reason : Rust has the compostion Fe_(3)O_4

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.
assertion is true but reason is false.
both assertion and reason are false.

SOLUTION :Both are false
(i) Dry air has no reaction with IRON
(ii) Rust has the COMPOSITION `Fe_2O_3. x H_2O`.
Discussion
5.

Assertion : [Pt(NH_3) _2 Cl_2]is a hetuoleptic complex. Reason: NH_3 and C'^(-)are weak ligands.

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 :C
Discussion
6.

Assertion : Protons are more effective than neutrons of equal energy in causing artifical disintegration of atoms. Reason : Neutrons are neutral they penetrate the nucleus.

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 explanantion of the assertion
If assertion is true but reason is false
If assertion is false but reason is true

Solution :Neutrons are more effective than protons of equal energy in causing artificial disintegration of atoms. Neutrons are neutral they penetrate the nucleus and do not exert any REPULSIVE FORCE like positive charged protons.
Discussion
7.

Assertion : Proteins are polymers of alpha - amino acids Reason : Glycine is optically 'inactive amino acid.

Answer»

SOLUTION : Both (A) and (R) are TRUE but (R) does · not EXPLAIN (A)
Discussion
8.

Assertion: Proteins on hydrolysis produce amino acids. Reason : Amino acids contain NH_(2) and -COOH groups

Answer»

If both assertion and reason are true and the reason is the CORRECT explanation of the assertion.
If both assertion and reason are truebut 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 :PROTEINS on HYDROLYSIS GIVES `alpha`-amino ACID because amino acids are the building block of proteins. It is also fact that amino acids contain both `-NH_(2)` and -COOH group.
Here assertion and reason both are correct but reason is not a correct explanation of assertion.
Discussion
9.

Assertion :Propene reacts with HI in presence of peroxide give 1-iodopropane. Reason : 1^(@) free radical is less stable than 2^(@)free radical

Answer»


ANSWER :4
Discussion
10.

Assertion: Pressure exerted by gas in a container with increasing temperature of the gas. Reason : With the rise in temperature, the average speedof gas molecules increases.

Answer»

If both assertion and reason are TRUE and the reason is 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 :When the temperature INCREASE, the AVERAGE SPEED of gas molecules increases and by this increase the pressure of gas ALSO increases.
Discussion
11.

Assertion: Pressure does not have significant effect on solubility of solids in liquids Reason :Solids and liquids are highly incom pressible

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
12.

Assertion : Preservatives are added to food items Reason: Preservatives inhibit the growth of microorganisms.

Answer»

Assertion and REASON both are CORRECT statement but reason does not explain assertion
Assertion and reason both are correct and reason EXPLAINS the assertion
Both assertion and reason are WRONG statement
Assertion is correct statement reason is wrong statement

Solution :Reason is the correct explanation of assertion.
Discussion
13.

Assertion: Primary allylic halides show higher reactivity in S_(N^(1)) reactions than other primary alkyl halides. ltBrgt Reason: Intermediate carbocation in allyl halides is stabilised by resonance.

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 :Reason is the correct explanation for assertion.
Discussion
14.

Assertion: Presence of -NO_(2) group facilitates the nucleophilic substitution reactions in aryl halides. Reason: the intermediate carbanion is stabiliised due to the presence of -NO_(2) group.

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 :Reason is the correct explanation for assertion.
Discussion
15.

Assertion: Presence of a nitro group at ortho or para position increases the reactivity of haloarenes towards nucleophilic substitution. Reason: Nitro group, being an electron withdrawing group, decreases the electron density over the benzene ring.

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 :Reason is the correct explanation for the assertion.
Discussion
16.

Assertion : Potassium -di -chromate isa powerful oxidising agentacidicmedium Reason: The oxidationstate ofchromiumchangesfromCr^(6) +to Cr^(3+)

Answer»

bothassertionand reasonare truereasonis thecorrectexplanationof THEASSERTION .
bothassertinandreasonare truebutreasonis notcorrectexplanationof theassertion
Assertionis truebutreasonis FALSE
Bothassertionand reasonare false.

Answer :A
Discussion
17.

Assertion. Potassium ferrocyanide is diamagnetic whereas potassium ferricyanide is paramagnetic. Reason. Crystal field splitting in ferrocyanide ion is greater than that of ferricyanide ion.

Answer»

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

Solution :CORRECT R. In FERROCYANIDE, Fe is in oxidation state + 2 while in ferricyanide, Feis in oxidation state + 3. Higher the oxidation state of the metal, greater is the crystal FIELD splitting.
Discussion
18.

Assertion : Potassium and caesium are used in photoelectric cells. Reason : Potassium and caesium 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 nto the correct exaplation 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 of light due to low ionisation potential.
Discussion
19.

Assertion : Potassiumcan be used in lassaigne test. Reason : Potassium reactsvigorously.

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 reson 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 :In LASSAIGNE test POTASSIUM can not becaused in place of SODIUM as potassium reacts vigorusly and its USE causesexplosion.
Discussion
20.

Assertion : Polytetrafluoroethene is used in making non-stick cookwares. Reason : Fluorine has highest electronegativity.

Answer»

Assertion and REASON both are correct statements and reason does not EXPLAIN assertion.
Assertion and reason both are correct statements but reason EXPLAINS the assertion.
Both assertion and reason are wrong statements.
Assertion is correct STATEMENT and reason is wrong statement.

Solution :Correct explanation : Because of great chemical inertness and high THERMAL stability , teflon is used in making non-stick cookware.
Discussion
21.

Assertion : Positive ions will be wider than parent atoms. Reason : Nuclear charge pulls them closer.

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
Ifassertion is true but reason is false
If the assertion and reason both are false

Solution :Positive IONS will be smaller than parent atoms.
Discussion
22.

Assertion : Polysaccharides are called non-sugars. Reason : Carbohydrates which yield a large number of monosaccharide units on hydrolysis are called polysaccharides.

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 :POLYSACCHARIDES are not sweet in TASTE HENCE they are called non-sugars.
Discussion
23.

Assertion: Polypropylene is an addition polymer . Reason : Addition polymerization generally occurs among molecules which contain double bonds.

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.

ANSWER :A
Discussion
24.

Assertion : Polyproplyene is an addition polymer Reason : It result because of chain growth polymerisation

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 assertion and reason are both incorrect

Solution :correct reason . Propylene molecules have olefinic LINKAGES
Discussion
25.

Assertion: Polybutadiene is an example of chain growth polymer. Reason : Copolymerization of butadiene and styrene gives Buna-S.

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 explanation : During polymerization of butadiene , MOLECULES add to growing chain carrying a free RADICAL.
Discussion
26.

Assertion : Polymerides are bust used as fiber because of high tensile strength. Reason : Strong intermolecular forces (like hydrogen bonding within polyamides) lead to close tracking of chains and increase the crystalline character, hence, provide high tensile strength to polymers.

Answer»

ASSERTION and reason both are correct statement but reason does not explain assertion.
Assertion and reason both are correct statements and reason EXPLAINS the assertion.
Both assertion and reason are wrong statement.
Assertion is correct statement and reason is wrong statement.

ANSWER :b
Discussion
27.

Assertion : Poly hydroxy butyrate (PHB) is a biodegradable polymer Reason : These polymers are degraded by enzyme action.

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
28.

Assertion: PMMA is used for making lenses and light covers. Reason : It has excellent light transmission properties.

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.

ANSWER :A
Discussion
29.

Assertion : Polyamides are best used as fibres because of high tensile strength. Reason : Strong intermolecular forces (like hydrogen bonding within polyamide) lead to close packing of chains and increase the crystalline character, hence , provide high tensile strength of polymers.

Answer»

ASSERTION and reason both are correct statements and reason does not explain assertion.
Assertion and reason both are correct statements but reason explains the assertion.
Both assertion and reason are WRONG statements.
Assertion is correct STATEMENT and reason is wrong statement.

SOLUTION :Reason is the correct EXPLANATION of assertion.
Discussion
30.

Assertion : pK_(a) value of acetic acid is lower than that of phenol Reason : Phenoxide ion is more resonance stabilised than acetate ion

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 :C
Discussion
31.

Assertion : Pig iron can be moulded into a variety of shapes. Reason : Zinc is obtained hydrometrically from low grade ores.

Answer»

Both A and R are correct statement, and R is the correct explanation of the A.
Both A and R are correct statement, but R is not the correct explanation of the A.
Assertion is correct, but REASON is INCORRECT statement.
Assertion is correct, but Reason is correct statement.

Answer :C
Discussion
32.

Assertion : Physisorption of a gas adsorbed at low temperature may change into chemisorption at a high temperature. Reason : Usually low pressure is also favourable for chemisorption

Answer»

If both assertion and reason are true and reasonis 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 :Usually high pressure is ALSO FAVOURABLE for chemisorption .
Discussion
33.

Assertion. Physical adsorption of molecules on the surface requires activation energy. Reason. Because the bonds of adsorbed molecules are broken.

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. Activation energt is NEEDED for CHEMICAL adsorption and not for PHYSICAL adsorption.
Correct R. Breaking of bonds ALSO takes place only on chemical adsorption.
Discussion
34.

Assertion : Physical adsorption increases with increase in temperature. Reason : Physical adsorption is an endothermic process.

Answer»

If both assertion and REASON are true and reasonis 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 :Physical adsorption is an exothermic process.
Solid + GAS `hArr` Gas/Solid + Heat
So according to Le-Chatelier PRINCIPLE it will decrease with increasing temperature.
Discussion
35.

Assertion: Photochemical smog is oxidising in nature. Reason: Photochemical smog contains NO_(2) and O_(2), whichare formed during the sequences of reastions.

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 true but the reason is false
If assertion is false but reason is true

Answer :A
Discussion
36.

Assertion: Phosphorus tribromide is ofter preferred as a reagent for the transformation of an alcohol to the corresponding alkyl bromide Reason: The net result is conversion of 3mol of alcohol to alkyl bromide by 1 mol of phosphorus tribromide

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
37.

Assertion: Phenoxiede ion treatment with active alkyl halide (e.g., CH_(2)=CH-CH_(2)Cl) gives two products viz. O-substituted and C-substituted. Reason: Phenoxide ion is an ambidennt nucleophile.

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 :
THUS, it gives TWO products, i.e., O-substituted and C-substituted with active ALKYL halide.
Discussion
38.

Assertion: Phosphoruchlorides (tri and penta) are preferred over thionyl chloride for the preparation of alkyl chlorides from alcohols. Reason: Phosphorus chlorides give pure alkyl halides.

Answer»

Assertion and reason both are correct and reason is correct explanaion 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 :(b) Correct Assertion: Thionyl chloride is PREFERRED over PHOSPHORUS chlorides (tri and PENTA) for the PREPARATION of alkyl chlorides from alcohols.
Correct reason: Thionyl chloride GIVES pure alkyl chloride.
Discussion
39.

Assertion: Phenoxide ion on treatment with active alkyl halide (e.g., CH_(2)=CH_(2)-CH_(2)Cl) gives two products, viz. , O-substituted annd C-substituted. Reason: Phenoxide ion is an ambident nuleophile.

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 o the assertion.
if assertion is true, but reason is false.
If both assertion and reason are false.

Answer :A
Discussion
40.

Assertion : Phenolundergoes Kolbe's reaction whereasethanoldoes not . Reason :Phenoxideion is more basicthan ethoxide ion .

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 for assertion.
If assertion is correct but reason is incorrect.
If both assertion and reason are incorrect.

Solution :Correct reason : The CONJUGATE base phenoxide ion is more resonance stabilised than ethoxide ion and can participate in the ELECTROPHILIC substitution more readily than ethoxide ion.
Discussion
41.

Assertion: Phosphorus chlorides (tri and penta) are preferred over thionyl chloride for the preparation of alkyl chlorides from alcohols. Reason: Phosphorus chlorides give pure alkyl halides.

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 statement. Thionyl chloride is preferred over phosphorus chlorides (tri and penta) for the PREPARATION of alkyl chlorides from ALCOHOLS.
Correct reason. Thinyl chloride GIVES pure alkyl chlorides.
Discussion
42.

Assertion: Phenol undergoes Kolbe's reaction but ethanol does not. Reason Phenol is more acidic than ethanol.

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
43.

Assertion : Phenol is more reactive than benzene towards electrophilicsubstitution-reaction Reason : In the case of phenol, the intermediated carbocation is more resonance stabilised

Answer»

Both assertion and REASON are correct and reason is the correct explanationof the assertion.
Both assertion and reason are correct, but reason is not thecorrect explanation of the assertion
Assertion is correct , but reason is incorrect
Assertion is incorrect , but reason is correct

Solution :In phenol , -OH group is attached with C-atom of benzene ring. OH-group SHOWS + M EFFECT so, it is able to ACTIVATE the benzene ring as follows

Thus, the electron density of ortho and para-position is higher in comparison to benzene. Hence electrophile MUST be attached on o/p position.

The more stabilized carbanion and thus facilitate attack of electrophile
Discussion
44.

Assertion: Phenols give o- and p-nitrophenol on nitration with conc. HNO_(3) and H_(2)SO_(4) mixture. Reason: -OH group in phenol is o-, p-directing.

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. Phenols give o- and p-nitrophenols on nitration with DIL. `HNO_(3)` at 298K.
Discussion
45.

Assertion: Phenol reacts with CH_(3)l in presence of NaOH to form methoxybenzene. Reason: Phenoxide is better nucleophile than phenol.

Answer»

If both assertion and reason are true and reason is the CORRECT EXPLANATION of assertion.
If both assertion and RESON 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.

Answer :A
Discussion
46.

Assertion : Phenol is more reactive than benzene towards electrophilic substitution reaction Reason : In the case of phenol, the intermediate arenium ion ismore stabilized by reasonance.

Answer»

if both assertion and REASON are true and reason is the correctexplanationof assertion.
if both assertion and reason are true but reason is not the CORRECT EXPLANATIONOF asserton.
assertion is true but reason is false
both assertion and reason are false.

Solution :if both assertion and reason are true and reason is the correctexplanationof assertion.
Discussion
47.

Assertion : Phenol undergo Kolbe reaction, ethanol does notReason: Phenoxide ion in more basic than ethoxide ion.

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 correct that SODIUM phenoxide (sodium SALT of phenol) and `CO_(2)` on heating from sodium salicylate. This is known as Kolbe's reaction. ETHANOL does not respond to this reaction. Therefore, assertion is true. But the reason that phenoxide ion is more basic than ETHOXIDE ion is not correct.
Discussion
48.

Assertion: Phenol is more reactive than benzene towards electrophilic substitution reaction. Reason: In the case of phenol, the intermediate arenium ion is more stabilized by resonance.

Answer»

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

ANSWER :A
Discussion
49.

Assertion : Phenol is more acidic than ethanol Reason : Phenoxide ion is resonance stabilized

Answer»

if both assertion and reason are TRUE and reason is the correctexplanationof assertion.
if both assertion and reason are true but reason is not the CORRECT explanationof asserton.
assertion is true but reason is false
both assertion and reason are false.

Solution :if both assertion and reason are true and reason is the correctexplanationof assertion.
Discussion
50.

Assertion. Phenol is a disinfectant. Reason. Disinfectants are used to stop infection of the wounds.

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 assetion.
If assertion is true, but reason if false
If both assertion and reason are false.

Solution :Correct R. DISINFECTANTS are USED in kill microorganisms present in drains, TOILETS etc. Antiseptics are used to stop INFECTION of the wounds.
Discussion