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 : Dimethylsulphide is commonly used for the reduction of an ozonide of an alkene to get the carbonyl compounds Reason : It reduces the ozonide giving water soluble dimethyl sulphoxide and excess of it evaporates

Answer»

ASSERTION is TRUE, Reason is True, Reason is a CORRECT explanation for Assertion.
Assertion is True, Reason is True, Reason is NOT correct explanation for Assertion.
Assertion is True, Reason is FALSE.
Assertion is False, Reason is True

Answer :A
Discussion
2.

Assertion : Dihydrogen is inert at room temperature. Reason : The H - H bond dissociation enthalpy is the highest for a single bond between two atoms of any element.

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
3.

Assertion. Dihydrogen oxidises sodium to sodium hydride. Reason. Hydrogen can act only as a reducing agent.

Answer»


SOLUTION :Correct reason. HYDROGEN acts as oxidising AGENT towards highly electropositive METALS like NA, Ca , etc.
Discussion
4.

Assertion. Different gases at the same conditions of temperature and pressure have same root mean velocity. Reason. Root mean square velocity lies between average velocity and most probable velocity.

Answer»


Solution :Correct A. RMS also depends upon the nature (MOLECULAR MASS) of the GAS (u`=SQRT(3RT//M)`
Correct R. `alpha:v:u=1:1.128:1.224(u GT u gtalpha)`
Discussion
5.

Assertion : Different gases at the same conditions of temperature and pressure have same root mean square speed Reason : Average K.E. of a gas is directly proportional to temperature in kelvin

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 :D
Discussion
6.

Assertion. Diamondis the hardest possible substanceand is a network covalent solid. Reason. All the C atoms in diamondare sp^(3)hybridised.

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

Answer :A
Discussion
7.

Assertion : Diamond is hard solid substance with network like arrangement. Reason : In diamond each carbon atom undergoes sp^3 hybridisation.

Answer»

STATEMENT ASSERTION and Reason both are right. Statement Reason is CORRECT explanation of statement Assertion.
Statement Assertion and Reason both are right , but Assertion is not correct explanation of statement Assertion.
Statement Assertion is right but statement Reason is wrong
Both statement Assertion and Reason are wrong .

SOLUTION :Statement Assertion and Reason both are right. Statement Reason is correct explanation of statement Assertion.
Discussion
8.

Assertion Diamond and graphite do not have same crystal structure. Reason(R)Diamond is crystalline while graphite is amorphous.

Answer»

Both A and R are TRUE and R is THECORRECT explanation of A
Both A andR 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
9.

Assertion. Degree of ionization of weak electrolyte increases with dilution. Reason. Degree of ionization is inversely proportional to molar concentration.

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

Solution :Correct R. DEGREE of IONIZATION of a weak electrolyte is inversely proportional to the square root of molar CONCENTRATION (Ostward dilution LAW).
Discussion
10.

Assertion: Deep electric chosk causes death of of an animal. Reason: Electric shock coagulate the blood.

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 fact that deep ELECTRIC shock causes death of an ANIMAL and the reason for this is that blood is coagulated by electric shock. Therefore, ehere both assertion and reason are true.
Discussion
11.

Assertion. Decrease in free energy causesspontaneous reaction. Reason. Spontaneous reactions are invariably exothermic reactions.

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 :C
Discussion
12.

Assertion : Decomposition of potassium chlorate is an example of redox reaction . Reason : There is no change in the oxidation number of potassium in decomposition of potassium chlorate.

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 :DECOMPOSITION of potassium chloratecan be represented as :
`overset(+1)(2K)overset(+5)(Cl)overset(-2)O_(3(s))overset(DELTA)rarroverset(+1)(2K)overset(-1)(Cl)_((s))+3overset(0)(O)_(2(g))`
`overset(+5)(Cl)` is reduced to `overset(-1)(Cl) ` and `overset(-2)(O)` isoxidised to `overset(0)O_(2)`, HENCE REACTION is a redox reaction.
Discussion
13.

Assertion. Decomposition of H_(2)O_(2) is a disproportionation reaction. Reason. H_(2)O_(2) molecule simnultaneously undergoes oxidation and reduction reactions.

Answer»


SOLUTION :CORRECT EXPLANATION. The EXTENT extent of H-bonding in `H_(2)O_(2)` is higher than that in `H_(2)O`.
Discussion
14.

Assertion : Decomposition of hydrogen peroxide is anexample of disproportionation reaction. Reason : In a disproportionation reaction, an element in one oxidation state is simultaneously oxidised and reduced .

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
15.

Assertion: Decolourisation of KMnO_(4) solution is used as a test for unsaturation. Reason: Alkenes on reaction with cold, dilute aqueous solution of potasssium permanganate produce vicinal glycols.

Answer»

If both assertion and reson 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 :
Discussion
16.

Assertion: D-mannose is the C_(2) -epimer of glucose. Reason: Glucose and D-mannose differ in configuration at C_(2).

Answer»

Both A and R are TRUE and R is the CORRECT EXPLANATION of A
both A and R 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 :A
Discussion
17.

Assertion. Cyclopentadienyl anion is much more stable than allyl anion. Reason. Cyclopentadienyl anion is aromatic in character

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
18.

Assertion: Cyclopentadienyl anion is aromatic in nature. Reason: Cyclopentaddienyl anion has six pi electrons.

Answer»

If both ASSERTION and reson 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 :
A COMPOUND is aromatic if it is planar, having COMPLETE delocalisationn of the `pi` electrons in the ring and has (4n+2)`pi`electrons in the ring where n is an integer.
Discussion
19.

Assertion : Cyclic silicates, three corners of each SiO_(4) tetrahedron are shared while in chain silicates only two are shared while in chain silicates only two are shared with other tetrahedron.

Answer»

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

Solution :Cyclic silicate and chain silicate both have same GENERAL formula `(SiO_(3))^(2-)`. In cyclic silicates oxygen atom is shared per tetrahedral and the basic unit is `Si_(3)O_(9)^(6-)` chain silicates involving sharing of two oxygen atoms by each tetrahadral having basic unit `(SiO_(3))_(n)^(2n-)`.
Discussion
20.

Assertion : CuSO_(4).5H_(2)O has one hydrogen-bonded molecule of water. Reason : The four molecules of water are coordinated in CuSO_(4).5H_(2)O.

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
21.

Assertion.CsCl has body-centred cubic arrangement.Reason . CsCl has oneCs^(+) ion and 8 Cl^(-)ions in its unit cell.

Answer»


SOLUTION :Correct R. CsCl has one ` CS^(+)`ION and one `Cl^(-)` ion in its unit CELL.
Discussion
22.

Assertion : Critical temperature of CO_(2) is 304K, it can be liquefied above 304K. Reason : For a given mass of gas, volume is to directly proportional to pressure at constant temperature

Answer»

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

Answer :D
Discussion
23.

Assertion copper suphate solution isnot stored ina zinc vessel Reaseon zinc forms complex with CuSO_(4)

Answer»

If both assertion and REASN 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 zinc DISSOLVE while copper gets DEPOSITED
Discussion
24.

Assertion : Copper sulphate solution is not stored in zinc vessel. Reason : Zinc forms complex with copper sulphate .

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 :c
Discussion
25.

Assertion :Copper is unable to displace H_2 form dil. H_2 SO_4 Reason:The standard electrode potential for Cu^(2+)//Cu system is greater than that of H^+//1/2 H_2 system.

Answer»

If both ASSERTION 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 :A
Discussion
26.

Assertion : Conversion of potassium ferrocyanide to potassium ferricyanide is an oxidation process. Reason : Oxidation is the addition of oxygen/electronegative element to a substance or removalof hydrogen/electropositive element from a substance.

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
27.

Assertion. Conformers are impractical to separate Reason. Conformers have negligibly small difference in their potential energy

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
28.

Assertion : concentrationof thereactant and product does not change with time at equilibrium for a a chemical reaction. Reason : The rate of a reaction is zero at equilibrium .

Answer»

if both ASSERTION and REASON are CORRECT and reason is CORRECTEXPLANATION 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 boht are incorrect.

Solution :Reason is the correct explanation for assertion.
Discussion
29.

Assertion : Concentration of H_(2)O_(2) is expressed in volume. Reason : Volumestrength of H_(2)O_(2) = Normality xx 5.6.

Answer»

If both ASSERTION and REASON are CORRECT, and Reason is the correct EXPLANATION of Assertion.
If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.
If Assertion is correct, but Reason is INCORRECT.
If Assertion is incorrect, but Reason is correct.

Solution :N//A
Discussion
30.

Assertion : Compressibility factor (Z) is the ratio of actual molar volume of a gas to the molar volume of it , if it were an ideal gas at that temperature and pressure .Reason : At high pressure all the gases have Z lt 1 and can be easily compressed .

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 notthe correct explanation of assertion .
If assertion is true but reason is false .
If both assertion and reason are false .

Solution :At high PRESSURE all the gases have Z gt 1 and are DIFFICULT to compress.
Discussion
31.

Assertion : Compressibility factor for ideal gas is one. Reason : For an ideal gas PV = nRT equation is obeyed.

Answer»

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

Solution :Reason is the correct explanation for assertion.
Discussion
32.

Assertion : Compounds with difference in their boiling points by about 30^(@)C can be separated by simple distillation. Reason : All liquid mixtures can be separated by distillation method.

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. Only those liquid MIXTURES can be separated by distillation method in which at least ONE constituent is of VOLATILE NATURE.
Discussion
33.

Assertion. Compressibility factor for hydrogen varies with pressure with positiveslope at all pressures. Reason. Even at low pressures, repulsive forces dominate in hydrogen gas.

Answer»


Solution :Assertion is correct as seen from the plot in Fig. 5.33 (a), PAGE 5/47. Reason is the correct explanation because for `H_(2)` at 273 K, `Z gt 1` which means that it is difficult to compress the gas as compared to ideal gas. This implies that repulsive FORCES dominate.
Discussion
34.

Assertion. Colouredcations can be identifiedby boraxbead test. Reason. Transparent bead (NaBO_(2) + B_(2)O_(3))forms colouredbeadwith coloured cation.

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

Answer :A
Discussion
35.

Assertion : CO_(4)^(-) does not snow disproportionation reaction. Reason : In ClO_(4)^(-) , chlorine is present in its highest oxidation state .

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
36.

Assertion : CO_2 is gas at room temperature but SiO_2 is solid at room temperature. Reason : CO_2 possess C=O bond but SiO_2 does not possess Si=O bond.

Answer»

STATEMENT Assertion and Reason both are right. Statement Reason is CORRECT EXPLANATION of statement Assertion.
Statement Assertion and Reason both are right , but Assertion is not correct explanation of statement Assertion.
Statement Assertion is right but statement Reason is wrong
Both statement Assertion and Reason are wrong .

SOLUTION :Statement Assertion and Reason both are right , but Assertion is not correct explanation of statement Assertion.
Discussion
37.

Assertion : CO_(2) is a gas at room temperature while SiO_(2) is a crystalline solid. Reason : SiO_(2) is a network of silicon and oxygen atoms joined by multiple bonds

Answer»


Solution :`SiO_(2)` is a three-dimensional NETWORK solid in which each SI atom is covalently bonded in a TETRAHEDRAL MANNER to FOUR O atoms.
Discussion
38.

Assertion : CO_2 has stronger intermolecular forces than CH_4. Reason : Critical temperature of CO_2 is more.

Answer»

A and R both are CORRECT, and R is correct EXPLANATION of A.
A and R both are correct, but R is not correct explanation of A.
A is TRUE but R is FALSE.
A is false but R is true.

Answer :A
Discussion
39.

Assertion. CO_(2) above 31^(@)C and 600 pressure is used for removing caffeine from coffee beans. Reason. CO_(2) is gaseous in nature.

Answer»


Solution :CORRECT explanation. `CO_(2)` above `31.1^(@)C` and 600 bar pressure acts as a supercritical fluid which dissolves MANY organic substances like caffeine. Dissolution is not due to `CO_(2)`being gaseous in nature.
Discussion
40.

Assertion : CO is highly poisonous substance. Reason : CO can form stable complex with hemoglobin in blood

Answer»

STATEMENT Assertion and Reason both are RIGHT. Statement Reason is CORRECT explanation of statement Assertion.
Statement Assertion and Reason both are right , but Assertion is not correct explanation of statement Assertion.
Statement Assertion is right but statement Reason is WRONG
Both statement Assertion and Reason are wrong .

Solution :Statement Assertion and Reason both are right. Statement Reason is correct explanation of statement Assertion.
Discussion
41.

Assertion. CO and NO both combine with hemoglobin Reason. NO has more affinity than CO towards haemoglobin.

Answer»

If both ASSERTION and REASON are true and Reason is the correct EXPLANATION of Assertion.
Both Assertion and Reason are true but REASONIS not the correct explanation of Assertion
If Assertion is true but Reason is false
If both Assertion and Reason are false

Solution :Both Assertion and Reason are correct but is not the correct explanation of Assertion
Discussion
42.

Assertion : CO_(2) gas stronger intermolecular forces than CH_(4) Reason : Critical temperature of CO_(2) is more.

Answer»

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

Solution :Correct reason : Reason is the correct explanation for assertion.
Discussion
43.

Assertion: cis-form of alkene is found to be more polar than the trans-form. Reason: Since the groups are in opposite directions in the trans-form, the dipole moments of bonds cancel each other making trans-form almost non-polar.

Answer»

If both assertion and reson 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 :
Discussion
44.

Assertion. Chlorine whensolidifies doe not have zero entropy even at absolute zero. Reason. Chlorine is a pungent smelling gas and it is difficult to solidify it.

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 :B
Discussion
45.

Assertion. Chlorine reacts more rapidly with H_(2) than with D_(2). Reason. D-Cl bond is stronger than H-Cl bond.

Answer»


SOLUTION :CORRECT explanation. Due to isotope effect, RATE of reaction of `Cl_(2)` with `D_(2)` is SLOWER than that with `H_(2)`.
Discussion
46.

Assertion: CH_(3)-underset(COOC_(2)H_(5))underset(|)C=CH-COOH is 3-carbethoxy -2- butenoicacid. Reason: The principal functional group gets lowest number followed by double bond (or) triple bond.

Answer»

both the assertion and REASON are true and the reason is the correct explanationof assertion
both the assertion and reason are true and the reason is not the correct explanationof assertion
assertion is true but reason is false
both the assertion and the reason are false

Answer :A
Discussion
47.

Assertion: Cesium is the most electropositive element. Reason: Cs has lowest electron affinity.

Answer»

Both A and B TRUE and R is the CORRECT EXPLANATION 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
48.

Assertion : Cathode rays do not travel in straight lines. Reason : Cathode rays penetrate through thick sheets.

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 isnot the correct explanation of the assertion
If assertion is true but reason is false
If the assertion and reason both are false

Solution :We KNOW tha cathode rays cast shadows of solid objects placed in their path. During experiment PERFORMED on these rays, fluorescene (flash of light) is observed in the region, outside the shadow. This shows that cathode rays travel in straight lines. We also know that cathode rays penetrate through a thin sheet of metals but are stopped by thick sheets. Therefore both Assertion and Reason are false.
Discussion
49.

Assertion. Cathode rays originate from the cathode and move towards andoe. Reason. Electrons present in the material of the cathode are continuously emitted on applying high voltage

Answer»

If both assertion and reason are true, and reason is the true EXPLANATION of the arrertion
If both assertion and reason are true, but reason is not the true explanation of the assertional
If assertion is true, but reason is false
If both assertion and reason are false

Solution :Correct A. Cathode rays do not ORIGINATE from cathode but are produced by the knock out of ELECTRONS of the atoms of the gas PRESENT in the discharge tube.
Correct R. Electrons are CONTINUOUSLY produced from the atoms of the gas present in the discharge tube.
Discussion
50.

Assertion: Carbondioxide is an of the important greenhouse gas.Reason: It is largely produced by respiratory function of animals and plants.

Answer»


ANSWER :B
Discussion