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: Separation of Zr and Hf is difficult. Reason : Because Zr and Hf lie in the same graph of the periodic table.

Answer»

Both assertion and REASON are TRUE, and reason is the CORRECT EXPLANATION of the assertion.
Both assertion and reason are True, but reason is not the correct explanation of the assertion.
Assertion is not True, but reason is True.
Both assertion and reason are False.

Answer :b
Discussion
2.

Assertion : Separation of Zr and Hf is difficult. Reason : Because Zr and Hf lie in the same group of the periodic table.

Answer»

Both ASSERTION and reason are true and reason is the CORRECT EXPLANATION of the assertion .
Both assertion and reason are true but reason is not the correc explanation of assertion.
Assertion is not true for reason is true
Both assertion and reason are false.

Solution :Correct explanation . ZR and Hf have NEARLY the samesize.
Discussion
3.

Assertion : Semiconductors are solids with conductivities in the intermediate range from 10^(-6) to 10^4 "ohm"^(-1)"m"^(-1). Reason: Intermediate conductivity in semi conductor is due to partially filled valence band.

Answer»

Assertion and REASON both are correct statement 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. 

SOLUTION :The CONDUCTIVITY in semiconductors is due to small energy gap i.e., forbidden gap.
Discussion
4.

Assertion: Second E.A. for halogens is almost zero. Reason: Fluorine has maximum value of electron affinity.

Answer»

If both assertion and reason are TRUE annd the 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 the reason is FALSE
if assertion is false but the reason is true

Answer :C
Discussion
5.

Assertion. SeCl_(4) does not have a tetrahedral structure. Reason. Se in SeCl_(4) has two lone pairs.

Answer»

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

Solution :Correct reason. Se in `SeCl_(4)` is `sp^(3)` d hybridized and has ONE lone PAIR of electrorns.
Discussion
6.

Assertion: Sb(III) is not precipitated as sulphide when in its alkaline solution H_(2)S is passed. Reason: The concentration of S^(2-) ion in alkaline medium is inadequate for precipitation.

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 :Assertion is true but reason is false.
Sb(III) is a basic radical of IIB group for which group reagent is `H_(2)S` in presence of dilute HCl. It is NECESSARY to MAINTAIN the proper HYDROGEN ion concentration for the precipitation of IV group cations.
Discussion
7.

Assertion : Saturated hydrocarbons are chemically less reactive. Reason : All isomeric paraffins have same parent name.

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 and the 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 :LESS reactivity of saturated hydrocarbons are due to presence of SINGLE BONDS between carbon atoms.
Discussion
8.

Assertion : Sb (III) is not precipitated as sulphide when in its alkaline solution H_(2)S is passed. Reason : The concentration of S^(2-) ion in alkaline medium is inadequate for precipitation.

Answer»

If both ASSERTION and REASON are TRUE and 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.

Answer :A
Discussion
9.

Assertion : Same number of electron pairs are present in resonance structures. Reason : Resonance structures differ in the location of electrons around the constituent atoms.

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 and 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 :Resonance structures contain the same number of UNPAIRED electrons.
Discussion
10.

Assertion : Saline hydrides are non volatile, non conducting & crystalline solids. Reason : Saline hydrides are compounds of hydrogen with most of the p-block elements.

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 :C
Discussion
11.

Assertion. Saccharin is an artificial sweetener. Reason. It has a high calorific value.

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 reason . It has no CALORIFIC value
Discussion
12.

Assertion : S_(2)O_(7)^(2-) & Cr_(2)O_(7)^(2-)both exist. Reason : Both have same valence electrons

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 :`O^(-)-overset(O)overset(||)underset(O)underset(||)S-O-overset(O)overset(||)underset(O)underset(||)S-O^(-)" & "O^(-)-overset(O)overset(||)underset(O)underset(||)"Cr"-O-overset(O)overset(||)underset(O)underset(||)Cr-O^(-)`
Both having same STRUCTURE and same valance electrons
Discussion
13.

Assertion : Reverse current flows in charging of lead storage battery: Reason : During charging PbSO_(4) convery into Pb and PbO_(2)

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.

Answer :A
Discussion
14.

Assertion :- Rennin is a proteolytic enzyme. Reason :- It helps in digestion of milk protein.

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 Assertiion.
If Assertion is True but the Reason is False.
If both Assertion & Reason are False

Answer :A
Discussion
15.

Assertion : Reverse osmosis is used in the desalination of sea water. Reason : When pressure more than osmotic pressure is applied, pure water is squeezed out of the sea water through membrane.

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 :If a pressure large than the osmotic pressure is applied to the solution side, the pure SOLVENT flows out of the solution through semi-permeable membrane and this phenomenonis called as REVERSE osmosis.
Discussion
16.

Assertion : Refining of pendulum involves fractional distillation. Reason : Fractional distillation involves repeated distillation.

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 the assertion and reason both are false.

Solution :N//A
Discussion
17.

Assertion : Reduction of glucose with NaBH_(4) forms two products differing in configuration. Reason : A chiral carbon is formed due to reduction of keto group at C_(2).

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 :Reason is the correct explanation for assertion.
Discussion
18.

Assertion : Reducing power of Nascent hydrogen much greater then simple atomic hydrogen. Reason : Nascent hydrogen more above in electrochemical series than simple atomic-hydrogen

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 :D
Discussion
19.

Assertion : Receptors are crucial to body's communicational process. Reason : Receptorsare proteins.

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 :Neurotransmitter are small molecules whichbind to the receptor for a VARY short TIME to transfermessage to it and depart quickly unchangedafter transferring the MESSAGE . The receptor then forwards the message inside the cell.
Discussion
20.

Assertion : Receptors are crucial to body's communication process Reason: Receptors are proteins.

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 :Correct explanation. NEUROTRANSMITTERS are small molecules which bind to the receptor for a veryshort TIME to transfer message to it and depart quickly unchanged after transferring the message. The receptor then forwards the message inside the cell.
Discussion
21.

Assertion : Receptor proteins show selectivity for one chemical messenger over the other. Reason: Chemical messenger binds to the receptor site and inhibits its natural function.

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 : Correct reason. Chemical messenger binds the RECEPTOR site and gives the message to the cell without entering the cell.
Discussion
22.

Assertion: Reason : Salicylate ion is a weaker base than para hydroxy benzoated due to stablization by intramolecular hydrogen bonding.

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
23.

Assertion: Reason : Nitric acid, a strong oxidizing agent Phenol in to para benzoquinone

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
24.

Assertion : Reason : Aromaticity in three rings gives more stability than two rings

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 :D
Discussion
25.

Assertion: Reason:

Answer»

If both assertion and REASON are true and the reason is the correct explanantion of the assertion.
If both assertion and reason are true but reason is not the correct explanantion of the asseriton.
If assertion is true but reason is false.
If assertion if false but reason is ture.

Solution :(i)
(ii)
Reaction (iii) is FASTER than (i), HENCE the assertion is false because `-I` power of `O` ATOM destabilises the
But reason `(R )` is true.
Discussion
26.

Assertion : Reaosn :

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 the assertion and reason both are false

Solution :It is true that a beam of ELECTRONS DEFLECTS more than a beam of `alpha`-particles in an electric FIELD. It is also true that electrons have `-ve` while `alpha-`particles have +ve CHARGE. Here both are true but reason is not a correct explanation.
Discussion
27.

Assertion. Reaction of SO_(2) and H_(2)S in the presence of Fe_(2)O_(3) catalyst gives elemental sulphur. Reason. SO_(2) is a reducing agent.

Answer»

If both assertion and REASON are true, and reason is the CORRECT explanation of the assertion.
If both assertion and reason are ture, but reason is not the correct explanantion of the assertion.
If assertion is true, but reason is FALSE.
If both assertion and reason are false

Solution :Correct reason. `SO_(2)` acts as an oxidising AGENT, thus oxidises `H_(2)S` to elemental S.
Discussion
28.

Assertion: Reaction of alcohols with SOCl_(2) is catgalysed by the presence of a tertiary amine (R_(3)N). Reason: Tertiary amine promotes the reaction by reacting with the by product HCl.

Answer»

If both ASSERTIONN 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: Reaction of alcohol with SOCl_(2) is catalysed by the presence of a tertiary amine (R_(3)N). Reason: Tertiary amine promotes the reaction by reacting with the by product HCl.

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
30.

Assertion : Rayon is a semi synthetic polymer and is taken as a bettter choice than cotton fabric. Reason : Mechanical and aesthetic properties of cellulose can be improved by acetylation.

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
31.

Assertion : Rate of reaction increases with increase in temperature. Reason : Number of effective increases with increase in temperature.

Answer»

If both ASSERTION and REASON are TRUE and reason is the CORRECT EXPLANATION of assertion.
If both assertion and reason are true butreason 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
32.

Assertion : rate of reaction doubles when the concentration of the reactant is doubles if it is a first order reaction.

Answer»

Both ASSERTION and reason are true and reason is the correct EXPLANATION of assertion.
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 :For a first reaction, when the CONCENTRATION of reaction is doubled , then the rate of reaction ALSO doubled .
Rate constant is independent of concentration and is a constant at a constant temperature , i.e., it depends on the temperature and HENCE , it will not be doubled and when the concentration of the reactant is doubled .
Discussion
33.

Assertion : rate of reaction doubles when the concentration of the reactant is doubles if it is a first order reaction. Reason : rate constant also doubles

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 :HINT : For a first reaction, when the concentration of REACTANT is doubled, then the rate of reaction also doubled.
Rate constant is indepened of concentration and is a constant at a constant temperature i.e., it DEPENDS on the temperature and hence, it will not be doubled and when the concentration of the reactant is doubled.
Discussion
34.

Assertion: Rate of reaction doubles when the concentration of the reactant is doubled if it is a first order reaction. Reason: Rate constant also becomes double.

Answer»

If both assertion and reason are 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 :c) Correct reason. RATE constant REMAINS constant for the reaction and is INDEPENDENT of the INITIAL CONCENTRATION of the reason.
Discussion
35.

Assertion : Rate of Ether formation with methanol at c-1 more than at c-2 in Reason : Carbocation At Cl more resonance stablised then at C2

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
36.

Assertion : Rate of reaction CD_(4)+Cl_(2)rarr" Slow"CH_(4)+Cl_(2)rarr"Fast." Reason : Due to isotopic effect.

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 :A
Discussion
37.

Assertion: Rate of constant increases with the increase in temperature. Reason: Number of collisions increase with the increase in temperatures.

Answer»

If both ASSERTION and REASON are 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: Rate of reaction INCREASES with increases in TEMPERATURE because the number of effective COLLISIONS increase.
Discussion
38.

Assertion : Rate constants determined from Arrhenius equation are fairly accurate for simple as well as complex molecules. Reason : Reactant molecules undergo chemical change irrespective of their orientation during collision.

Answer»

Both assertion and reason are correct and the reason is correct explananation of assertion.
Both assertion and reason are correct but reason does not EXPLAIN assertion.
Assertion is correct but reason is incorrect.
Both assertion and reason are incorrect.

Solution :Correct Reason. Arrhenius equation is APPLICABLE to collisions between SIMPLE as well as COMPLEX molecules.
Discussion
39.

Assertion : Rate constant of zero order reaction has same units as the rate reaction. Reason : Rate constant of zero order reaction does not depend upon unit of concentration.

Answer»

Both ASSERTION and reason are TRUE and reason is the correct explanation of assertion.
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.

ANSWER :C
Discussion
40.

Assertion: Rate constant k is equal to Arrhenius parameter if it involves free radical mechanism. Reason: E_(a)=0 for the free radical combinations.

Answer»

If both assertion and reason are 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 :a) Reason is the correct explanation for assertion.
`(k=Ae^(-Ea//RT))` If `E_(a)=0`, then k=A
Discussion
41.

Assertion : Rate constant determined from Arrhenius equation are fairly accurate for simple as well as complex molecule. Reason : Reactant molecules undergo chemical change irrespective of their orientation during collision.

Answer»

Both assertion and reason are TRUE and reason is the CORRECT explanation of assertion.
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.

Answer :C
Discussion
42.

Assertion : Radioactive heavy nuclei decay by a series of alpha- and //or beta-emission, to form a stable isotope of lead Reaosn : Radioactivity is a physical phenomenon

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 the assertion and reason both are false

Solution :At onetime, it was believed that actinium series starts with `Ac -227` but now it is well KNOWN that it starts with `U - 235 and Ac -227` is one of the main products
Discussion
43.

Assertion: R-C -= O^(+) is more stable than R- C^(+) = O. Reason: Resonance in carbonyl compound provides C^(+) and O^(-).

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 :Both carbon and oxygen are NONMETALS and TRY to complete their octet. In `R-C-=O^(+)` each has complete octet whereas in `R-C^(+)=O`, carbon atom has in complete octet.
Discussion
44.

Assertion: Quasi-crystals form when certain molten alloys cool very slowly. Reason: quasi-crystals have shorts-range as well as long-range order in their arrangement.

Answer»

If both ASSERTION and reason are TRUE and the reason is the CORRECT EXPLANANTION 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.

Answer :B
Discussion
45.

Assertion :- Q_("Surr") is zero for adiabatic process Reason :- Final state of the system remains unchanged in adiabatic process.

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 :C
Discussion
46.

Assertion: Pyrrole is more basic than pyridine. Reason: In pyrrole, nitrogen is sp^(3)-hybridized.

Answer»

If both assertion and reason are true, and reason is the true explanation of the assertion.
If both assertion and reason are ture, 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 assertion: Pyrrole is less basic than pyridine.
Correct reason: In pyrrole, NITROGEN is `sp^(2)` HYBRIDIZED and the LONE pair of electrons on N is involved in aromatic SEXTET formation.
Discussion
47.

Assertion : Pyrrole is an aromatic heterocycliccompound Reason : It has cyclic delocalised 6 pi electrons

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 assertion and reason both are false

Solution :Pyrrole is a heterocyclic compound having five membered ring. It has `6pi`-electrons . As `4PI`-electrons in the ring and `2pi`-electrons donated by nitrogen atom PRESENT in the ring .
Discussion
48.

Assertion: Purine bases present in DNA are adenine and guanine. Reason: The base thymine is present in RNA while base uracil is present in DNA.

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.

Answer :C
Discussion
49.

Assertion : Pure water obtained from different sources such as river, well, spring, sea etc. always contains hydrogen and oxygen combined in the ratio 1:8 by mass. Reason : A chemical compound always contains elements combined together in same proportion by mass, it was discovered by French chemist, Joseph Proust (1799).

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 :Pure water always contains HYDROGEN and oxygen in the RATIO `1 : 8` by mass. This is in acceleration with the law of constant composition.
Discussion
50.

Assertion. Pure water obtained from different sources such as sriver, well, spring, sea etc. always contains hydrogen and oxygen in the ratio of 1:8 by mass. Reason. Total mass of reactants and products during chemical or physical change is always the same.

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 :Both Assertion and Reason are CORRECT STATEMENTS but Reason is not the correct explanation. The correct explanation is BASED on law of constant composition.
Discussion