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 (A) : Simple distillation can help in separating a mixture of propan-1-ol (boiling point 97^(@)C) and propanone (boiling point 56^(@)C). Reason (R) : Liquids with a difference of more than 20^(@)C in their boiling points can be separated by simple distillation.

Answer»

Both A and R are CORRECT and R is the correct EXPLANATION of A.
Both A and R are correct but R is not the correct explanation of A.
Both A and R are not correct.
A is not correct but R is correct.

Solution :R is the correct explanation of A.
Discussion
2.

Assertion (A) : Silicones are water repelling in nature. Reason (R) : Silicones are organosilicon polymers, which have (-R_(2)SiO-) as repeating unit.

Answer»

Both A and R are CORRECT and R is the correct EXPLANATION of A.
Both A and R are correct and R is not the correct explanation of A.
Both A and R are not correct.
A is not correct but R is correct.

Answer :A::B::C::D
Discussion
3.

Assertion (A) : Silicones are water repelling in nature. Reason (R) : Silicones are organosilicon polymers, which have (--R_2 SiO--)as repeating unit.

Answer»

Both Assertionand Reasonare correct and Reason is the correct explanation of Assertion.
Both Assertion and Reason are correct but Reason is not the correct explanation of Assertion.
Both Assertion and Reason are not correct
Assertion is not correct but Reason is correct

Solution :Silicones are the group of SILICON polymers, which have `R_2 SiO` as a REPEATING unit. Silicones being surrounded by non-polar alkyl GROUPS are water repelling in nature so Assertionand Reason both are correct but Reason is not the correct explanation of Assertion.
Discussion
4.

Assertion (A) : Silicons are water repelling in nature. Reason (R ) : Silicons are organosilicon polymers, which have (-R_(2)SiO-) as repeating unit.

Answer»

A and R both are correct R is the correct EXPLANATION of A
Both A and R are correct but R is not the correct explanation of A
A and R both are correct
A is not correct but R is correct

Solution :Silicones are a groups of organo silicon polymers which have `(R_(2)SiO)` as a repeating unit. This suggests that silicones are SURROUNDED by non-polar ALKYL groups that are water repelling in nature. They have WIDE applications. It is used for water proofing of fabrics.
Discussion
5.

Assertion (A) : Significant figures for 0.200 is 3 where as for 200 it is 1. Reason (R) : Zero at the end or right of a number are significant provided they are not on the right side of the decimal point .

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 the correct explanation of A.
A is true but R is false.
Both A and R are false.

Solution :ASSERTION is true but Reason is false. 0.200 contains 3 while significant figure while 200 contain only one significant figure because ZERO at end of right of a number are significant only if the right side of the DECIMAL point.
Discussion
6.

Assertion (A) : Secondary alcohol reacts faster with sodium than primary alcohol. Reason (R) : O-OH bond in secondary alcohol is less polar than that of primary alcohol.

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 a correct explanation of A.
A is true but R is FALSE.
A is false but R is true.

Answer :D
Discussion
7.

Assertion : A sample of 8.00 mole of chlorine gas in 94.00 litre tank at 27^(@)C leads to a pressure of 49.2 atmosphere according to ideal gas law Reason : The actual pressure of the sample of chlorine is nearly 20 atmoshpere less than the ideal pressure

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
A is false but R is true

Answer :B
Discussion
8.

Assertion (A) : Salt of Li are hydrated. Reason (R) : Lit have high hydrated fraction.

Answer»

Assertion (A) is true, REASON (R) is true. Reason (R) is a correct explanation for Assertion (A).
Assertion (A) is true, Reason (R) is true, Reason - (R) is not a correct explanation for Assertion (A).
Assertion (A) is true, Reason (R) is FALSE
Assertion (A) is false, Reason (R) is true.

Answer :A
Discussion
9.

Assertion (A) : Resorcinol turns FeCl_(3) Reason (R) : Resorcinol is trihydric phenol.

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 a correct explanation of A.
A is true but R is FALSE.
A is false but R is true.

Answer :B
Discussion
10.

Assertion (A) : Redox couple is the combination of oxidised and reduced form of a substance involved in an oxidation or reduction half cell. Reason ( R) : In the representation E_(Fe^(3+)//Fe^(2+))^(Ө)andE_(Cu^(2+)//Cu)^(Ө),Fe^(3+)//Fe^(2+)andCu^(2+)//Cu are redox couples.

Answer»

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

Answer :A
Discussion
11.

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

Answer»

if both ASSERTION and REASON are true and the reason is the correct EXPLANATION of the assertion.
if both assertion and reson 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 :Both assertion and reason are false.
there are reactions in which one of the PRODUCTS acts as catalyst (autocatalysiis) and no catalyst is added.
Discussion
12.

Assertion (A) Rb_(2)CO_(3)+2Coverset(Delta)rarr2Rb +3CO Reason (A) Rubidium cannot be produced by reduction with carbon.

Answer»


Solution :Reason. RUBIDIUM is volatile at the REACTION temperature and CO has the HIGHEST bond energy AMONG all the diatomic molecules.
Discussion
13.

Assertion (A): Rate of diffusion of H_2 gas is the highest. Reason (R) : Rate of diffusion of a gas is inversely proportional to molecular weight of the gas.

Answer»

A & R are true, R explains A 
A & R are true, R does not explain A 
A is true R is false 
A is false R is true 

SOLUTION :`H_2` is highest gas and `r alpha 1/(sqrtM)`.
Discussion
14.

Assertion (A) : Rain water normally has a pH of 5.6. Reason (R) : The presence of H_(2)SO_(4) and HNO_(3) produced from the oxides of sulphur and nitrogen lower the pH of rain

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) is true but (R) is FALSE
(A) is false but (R) is true

ANSWER :A
Discussion
15.

Assertion (A): Pure haloalkanes are colourless. Reason (R): Bromo and iodo alkanes are colour in the presence of light.

Answer»

Both (A) and (R) are TRUE.
(A) true but (R) FALSE.
(A) false but (R) true.
Both (A) and (R) are false.

Solution :Both (A) and (R) are true.
Discussion
16.

Assertion (A): Pure aniline is not obtained by steam distillation in reality Reason (R ): Due to steam distillation mix of water and aniline obtained in flask

Answer»

Statement (A) and Reason (R ) both are right. Statement (R ) is correct explanation of statement (A)
Statement (A) and Reason (R ) both are right, but (R ) is not correct explanation of statement (A)
Both Statement (A) and (R ) are wrong
Statement (A) is right but statement (R ) is wrong

Solution :In flask PURE aniline is present which is SEPARATED by seperating funnel. So pure aniline is obtained. Aniline is MIXTURE with water but by STEAM distillation pure aniline is obtained
Discussion
17.

Assertion (A): Propene CH_(3)CH= CH_(2) is a neutral molecule and it have three conjugate structures. Reason (R ): There C-H bond present in CH= CH_(2) of propane

Answer»

Statement (A) and Reason (R ) both are right. Statement (R ) is correct explanation of statement (A)
Statement (A) and Reason (R ) both are right, but (R ) is not correct explanation of statement (A)
Both Statement (A) and (R ) are wrong
Statement (A) is right but statement (R ) is wrong

Solution :Three hyperconjugation structure of propene are as under (I), (II) and (III)

There are three C-H bond in `CH= CH_(2)` in propene so, it is also correct

Three hyperconjugation structures are present three `C- H sigma`-bond in `CH_(3)` group NEED to `CH= CH_(2)`. So all `sigma` electron of three C-H bond migrate TOWARDS `SP^(2)` carbon and three `= C overset(oplus)(H)` structure form
Discussion
18.

Assertion. A process for which DeltaS _("system") gt 0 as well asDeltaH gt 0, passes from non-spontaneous to spontaneous state as temperature is increased. Reason.At higher temperature T DeltaSexceeds DeltaH.

Answer»

If both A and R are true,andR is the TRUEEXPLANATION of A.
If both A and R are true,but R is not the true EXPLANATION of A.
If A is true, but R is false
If both A and R are false.

Answer :a
Discussion
19.

Assertion (A) : Poisonous gases like SO_(2),Cl_(2),CH_(4) etc. from the atmosphere displace O_(2),N_(2) gases already adsorbed by the charcoal in the gas masks. Reason (R): A strongly adsorbed gas is displaced by a weakly adsorbed gas.

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
A is false but R is true

Answer :C
Discussion
20.

Assertion (A) : Poisonous gases can be diluted by the process of diffusion Reason (R): Ansil's alarm works on the principle of Graham's law

Answer»

A & R are true, R explains A 
A & R are true, R does not EXPLAIN A 
A is true R is FALSE 
A is false R is true 

Solution :Diffusion can be used to SEPARATE gases i.e., DILUTION.
Discussion
21.

Assertion (A) : Picric acid does not contain -COOH groups. Reason (R) : Picric acid is trihydric trinitrophenol.

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 a correct explanation of A.
A is true but R is false.
A is false but R is true.

Answer :B
Discussion
22.

Assertion (A): Photochemical smog is oxidising in nature. Reason (R) : Photochemical smog contains NO_2 and O_3, which are formed during the sequence of reactions.

Answer»

Both (A) and (R) are correct and (R) is the correct explanation of (A).
Both (A) and (R) are correct but (R) is not the correct explanation of (A).
Both (A) and (R) are not correct.
(A) is not correct but R is correct.

Solution :A variety of pollutants are emitted into the earth.s troposphere when fossil fuel burnt. TWO of the pollutants that are emitted hydrocarbons (unburnt fuels) and nitric oxide (NO).
When these pollutants builds up to sufficiently high levels, a chain reaction occurs from their interaction with sun light in which `NO_2`OXIDISES to `NO_2`. This `NO_2` in turns absorbs ENERGY from sunlight and breaks up into nitric oxide and free oxygen atom.
Discussion
23.

Assertion (A) : Photochemical smog is oxidising in nature Reason (R) : Photochemical smog contains NO_2 and O_3 which are formed during the sequence of reaction

Answer»

Both ASSERTION and Reason are correct and is the correct EXPLANATION of Assertion
Both Assertion and Reason are correct but REASONIS not the correct explanation of Assertion
Both Assertion and Reason are not correct
Assertion is not correct but Reason is correct

Answer :A
Discussion
24.

Assertion (A) : Phenol undergoes Kolbe's reaction whereas ethanol does not. Reason (R) : Phenoxide ions is more basic than ethoxide ion.

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 a correct explanation of A.
A is true but R is false.
A is false but R is true.

Answer :C
Discussion
25.

Assertion (A) : Phenol is strongly acidic than ethanol. Reason (R) : Phenoxide ion is more stabilized by resonance than ethoxide ion.

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 a correct explanation of A.
A is true but R is FALSE.
A is false but R is true.

Answer :A
Discussion
26.

Assertion (A) : Phenol is more reactive than toluence towardS_(E) reaction . Reason (R): underset(* *)overset(* *)(O)H group shows +R and _I both effect .

Answer»

Both A and R are TURE and R is the correct explanation of A .
Both A and R are TRUE but R is not correct explanation of A.
A is truebut R is FALSE
Both A and R are false

SOLUTION :N/A
Discussion
27.

Assertion (A) : Phenol is more acidic than aliphatic alcohols. Reason (R): The phenoxide ion is more stabilized than phenol by resonance effect and hence resonance favours ionization of phenol to form H^(+) and shows acidity.

Answer»

Both(A) and (R) are CORRECT and (R) is the correct EXPLANATION of (A).
Both (A) and (R) are correct but (R) is not the correct explanation of (A).
(A) is correct but (R) is WRONG
(A) is wrong but (R) is correct

Solution :Both(A) and (R) are correct and (R) is the correct explanation of (A).
Discussion
28.

Assertion (A) : Phenol is less acidic than benzoic acid. Reason (R) : Phenoxide has less number of resonating structures that benzyl carboxylate ion .

Answer»

Both A and R are ture and R is the CORRECT EXPLANATION of A .
Both A and R are true but R is not correct explanation of A.
A is true STATEMENT but R is false
Both A and R are false

SOLUTION :N/A
Discussion
29.

Assertion (A) : Phenol forms 2,4,6-tribormophenol on treatment with excess bromine water. 2,4,6-Troboromophenol is less soluble in water than phenol.

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 a correct explanation of A.
A is true but R is false.
A is false but R is true.

Answer :B
Discussion
30.

Assertion (A) : Phenol and alcohol can be distinguished by NaOH. Reason (R) : Alcohol is a very weak acid as compared to phenol.

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 a correct explanation of A.
A is true but R is FALSE.
A is false but R is true.

Answer :A
Discussion
31.

Assertion (A) : Permanent hardness of water is removed by treatment with washing soda. Reason (R): Washing soda reacts with soluble magnesium and calcium sulphate to form insolublecarbonates.

Answer»

STATEMENTS A and R both are CORRECT and R is the correct EXPLANATION of A.
A is correct but R is not correct
A and R both are correct but R is not the correct explanation of A.
A and R both are false.

Solution :(a) R is the correct explanation of A.
Discussion
32.

Assertion (A) :P^(H)of an aqueous solution of acetic acid remians unchanged on the addition of sodiumacetate. Reason ( R ) : Dissociation of acetic acid is supressed by the addition of soidum acetate due to commonion effect.

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 ) is true but (R ) is false
(A ) is false but (R ) is true

Solution :Common ION EFFECT decreases DISSOCIATION
Discussion
33.

Assertion (A): Permanent hardness of water is removed by treatment with washing soda. Reason (R) : Washing soda reacts with soluble magnesium and calcium sulphate to form insoluble carbonates.

Answer»

Statements (A) and R both are CORRECT and (R) is the correct explanation of (A)
(A) is correct but (R) is not correct
(A) and R both are correct but (R) is not the correct explanation of (A)
(A) and (R) both are false

Solution :Statements of assertion and REASON both are correct and reason is the correct explanation of assertion.
`Na_2CO_3+ UNDERSET"(form hard water)"underset(CaSO_4)underset"or"(MgSO_4) to Na_2SO_4 + underset"(insoluble)"underset(CaCO_3) underset"or"(MgCO_3)`
Discussion
34.

Assertion (A) : Pent-1-ene and pent-2-ene are position isomers. Reason (R) : Position isomers differ in the position of funtional group or a substituent.

Answer»

Both A and R are CORRECT and R is the correct EXPLANATION of A.
Both A and R are correct but R is not the correct explanation of A.
Both A and R are not correct.
A is not correct but R is correct.

Solution :R is the correct explanation of A.
Discussion
35.

Assertion (A): Pent-1-ene and pent-2-ene are position isomers. Reason (R): Position isomers differ in the position of functional group or substituent.

Answer»

Both ASSERTION and REASON are CORRECT and reason is the correct EXPLANATION of 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 :A
Discussion
36.

Assertion (A): Pent-1-ene and pent-2-ene are position isomers Reason (R ): Position isomers differ in the position of functional group or a substituent.

Answer»

Both (A ) and (R ) are CORRECT and (R ) is the correct explanation of (A)
Both (A) and R are correct but (R ) is not the correct explanation of (A)
Both (A) and (R ) are not correct
(A) is not correct but (R ) is correct

Solution :`OVERSET(5)( C)H_(3)- overset(4)(C )H_(2)- overset(3)(C )H_(2) - overset(1)(C )H= overset(1)(C )H_(2)` pent-1-ene
`overset(5)(C )H_(3)- overset(4)(C )H_(2)- overset(3)(C )H= overset(2)(C )H- overset(1)( C)H_(3)` pent-2-ene
These both structure CONTAINING `C_(6)H_(10)` molecular formula and same functionation group .allcene. but the position of function group is different, therefore they are position isomers. In it the position of `pi`-BOND is different
Discussion
37.

Assertion (A) : paraffin is the older name for the alkane group family of compounds . Reason (R ): This name comes from the Latin which means 'little activity'.

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 :A::B::C::D
Discussion
38.

Assertion (A) : p-Nitrophenol has a higher melting point than o-nitrophenol. Reason (R) : o-Nitrophenolexhibits intermolecular hydrogen bonding.

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 a correct explanation of A.
A is true but R is FALSE.
A is false but R is true.

Answer :C
Discussion
39.

Assertion (A): Paper chromatography is a type of partition chromatography. Reason (R ): In it paper is as a stationary phase and solute is as a mobile phase

Answer»

Statement (A) and REASON (R ) both are right. Statement (R ) is CORRECT explanation of statement (A)
Statement (A) and Reason (R ) both are right, but (R ) is not correct explanation of statement (A)
Both Statement (A) and (R ) are wrong
Statement (A) is right but statement (R ) is wrong

Solution :Because the solvent RISES up the paper by capillary ACTION. Different components are in different partition
Discussion
40.

Assertion (A): Ozone is destroyed by solar radiation in upper stratosphere. Reason (R): Thinning of the ozone layer allows excessive UV radiations to reach the surface of earth

Answer»

Both ASSERTION and Reason are correct and is the correct explanation of Assertion
Both Assertion and Reason are correct but REASONIS not the correct explanation of Assertion
Both Assertion and Reason are not correct
Assertion is not correct but Reason is correct

SOLUTION :Correct A. Ozone is DESTROYED by chlorofluorocarbons and nitric oxide.
Discussion
41.

Assertion (A): Oxygen plays a key role in the troposphere. Reason (R): Troposphere is not responsible for all biological activities

Answer»

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

Solution :(A) is correct but( R) is not correct
Discussion
42.

Assertion (A) : Ozone is destroyed by solar radiation in upper stratosphere. Reason (R): Thinning of the ozone layer allows excessive UV radiations to reach the surface of earth.

Answer»

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

Solution :Ozone layer is found in the stratosphere. The depletion of ozone layer (creation of ozone hole) is taking place due to REACTION with NO. Which produced from natural sources or human activity or in the exhaust gases of engines of supersonic planes or by reaction with chlorofulorocarbons (CFC.s) called freons. Freons produced from AEROSOL SPRAYS used in PROPELLANTS or from refrigerators where they are used as coolants.
The ozone hole allows the UV radiations to pass through and reach us, increasing chances of skin cancer.
Discussion
43.

Assertion (A) : One atomic mass unit is defined as one twelfth of the mass of one carbon-12 atom. Reason (R) : Carbon - 12isotope is the most abundant isotope of carbon and has been chosen as standard.

Answer»

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

Solution :ATOMIC masses of the elements obtained by comparing with the mass of carbon comes out to be close to whole number value.
Discussion
44.

Assertion (A) : o-Phenol sulphonic acid on heating at 100^(@)C changes to p-phenol sulphonic acid. Reason (R) : Sulphonation of phenol is a reversible process.

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 a correct explanation of A.
A is true but R is FALSE.
A is false but R is true.

Answer :A
Discussion
45.

Assertion (A): Nowadays chloroform is not used as an anaesthetic. Reason (R): Chloroform undergoes oxidation in the presence of light and air to form highly poisonous phosgene.

Answer»

Both (A) and (R) are CORRECT and (R) is the correct EXPLANATION of (A).
Both (A) and (R) are correct but (R) is not the correct explanation of (A).
(A) is correct but (R) is WRONG
(A) is wrong but (R) is correct.

SOLUTION :Both (A) and (R) are correct but (R) is not the correct explanation of (A).
Discussion
46.

Assertion (A): Nitration of benzene with nitric acid requires the use of concentrated sulphuric acid. Reason (R):The mixture of concentrated sulphuric acid and concentrated nitric acid produces the electrophile, NO_2^+.

Answer»

Both ASSERTION and REASON are correct and REASONIS the correct explanation of Assertion.
Both Assertion and Reason are correct butReasonisnot the correct explanation of Assertion.
Both Assertion and Reason are not correct
Assertion is not correct but Reason is correct.

SOLUTION :Both Assertion and Reason are correct and Reasonis the correct explanation of Assertion.
Discussion
47.

Assertion (A) : Nitration of benzene with nitric acid requires the use of concentrated sulphuric acid. Reason (R) : The mixture of concentrated sulphuric acid and concentrated nitric acid produces the electrophilic NO_(2)^(+).

Answer»

Both A and R are correct and R is the correct explanation of A.
Both A and R are correct and R is not the correct explanation of A.
Both A and R are not correct.
A is not correct but R is correct.

Solution :In NITRATION, benzene is treating with nitrating mixture, i.e., conc. `HNO_(3)` and `H_(2)SO_(3)` and `H_(2)SO_(4)` HELPS in furishing (Electrophile)
Discussion
48.

Assertion (A) Na+KCloverset(900^(@)C)rarrNaCl +K Reasons (A) Na is more reactive than K

Answer»


SOLUTION :Reason. Potassium is volatile at the REACTION TEMPERATURE (INFACT K is more reactive than Na).
Discussion
49.

Assertion(A): molecular crystals are generally good electrical insulators . Reson ® :the exiestence of discresnt molecules implies that the electraons tend to be locialized about specific set of nuclei consequently there are no charged particles m either ions & electrons.

Answer»

if both (A) and ® are CORRECT , and ® is correct explanartion of (A
if both (A) and® are correct , but ® is nmot the correct explanation of
if (A) is correct , but ® is INCORRECT.
if both (A) and ® are icorrect .

Answer :C
Discussion
50.

Assertion (A) Molar mass of D_(2)O is more than that of protium oxide. Reason (R ) Boiling point of protium oxide is higher than that of D_(2)O.

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 fales
A is fales but R is true.

Solution :Correct ASSERTION, Reason WRONG.
Discussion