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 mixture of o-nitrophenol and p-nitrophenol can be separated by steam distillation. Reason : p-Nitrophenol is steam volatile while o-nitrophenol is not steam volatile.

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. Due to chelation, o-nitrophenol is steam VOLATILE while p-nitrophenol is not steam volatile.
Discussion
2.

Assertion(A) methaneis called marsh gas Reason (R ) decomposition of plant and animal matter in ain oxygen deficient environmentlikeswamps mashesand bogs prodluce methane gas

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 CORECT explantion of a
a is correct but r is worng
a is worng but r is correct

Answer :d
Discussion
3.

Assertion (A): Metals have high thermal conductivity. Reason (R): Due to thermal excitation of many electrons from the valence band to the conductance band, metals have high thermal conductivity.

Answer»

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

Solution :Both (A) and (R) are correct and (R) is the correct explanation of (A).
Discussion
4.

Assertion (A): Methane can't act as Lewis acidReason (R): The carbon can't expand it's octet by accepting electron pairs.

Answer»

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

Answer :D
Discussion
5.

Assertion (A): Metals have high thermal conductivity. Reason (R): Absence of band gap is the main reason for high thermal conductivity.

Answer»

1) Both (A) and (R) are CORRECT and (R) is the correct explanation of (A).
2) Both (A) and (R) are correct but (R) is not the correct explanation of (A).
3) (A) is correct but (R) is wrong.
4) (A) is wrong but (R) is correct.

Solution :Both (A) and (R) are correct but (R) is not the correct explanation of (A).
Discussion
6.

Assertion : A metal having negative reduction potential when dipped in the solution of its own ions has a tendency to pass into solution . Reason : Metals undergo reduction .

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 :A metal having negative reduction potentialhas high tendency to get oxidised and hence metal passes into the solution.
Discussion
7.

Assertion (A): Mass and volume are extensive properties Reason (R ): Mass/volume is also an extensive property

Answer»

A and R are true, R explains A
A and R are true, R does not explain A
A is true, but R is FALSE
A is false, but R is true

Solution :`("EXTENSIVE")/("extensive")`= intensive
Discussion
8.

Assertion (A): Lithium salt are more soluble than salts of other metals of group-I Reason (R): The high solubility of Li salts is due to strong solvation of small size of Li ion.

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

Answer :D
Discussion
9.

Assertion (A) : Liquids tend to have maximum number of molecules at their surface. Reason (R ) : Small liquid drops have spherical shape .

Answer»

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

Solution :Correct A. Liquids tend to have minimum number of molecules on the surface due to FORCE of surface TENSION.
Discussion
10.

Assertion (A) : Liquids tend to have maximum number of molecules at their surface.Reason (R ) : Small liquid drops have spherical shape.

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.
A is false but R is true.

Solution :ASSERTION is false but reason is true.
Liquid tend to lower the number of MOLECULES or surface tension at their surface, that.s why SHAPEOF the small liquid drops is spherical.
Discussion
11.

Assertion (A) : Light oil is washed with water and treated with NaOH to remove phenol Reason (R) : Phenol is a basic impurity.

Answer»

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

Solution :Phenol is acidic.
Discussion
12.

Assertion (A) LiF is the least soluble of all the lithium halides in water. Reasons (A) It is due to its very high lattice energy.

Answer»


SOLUTION :REFER A-level INFORMATION.
Discussion
13.

Assertion (A): LiF is less soluble in water. Reason (R): LiF has high lattice enthalpy and small size of Li^(+) and F^(-)

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

Answer :A
Discussion
14.

Assertion (A) Li resembles Mg. Li^(+) has same size as Mg^(2+).

Answer»


ANSWER :A
Discussion
15.

Assertion (A) Li is the weakest reducing agent among the alkali metals Reason (A) In alkali metals, ionisation energy decreases down the group.

Answer»


Solution :LI is the strongest reducing AGENT among the alkali METALS.
Discussion
16.

Assertion (A) : Last traces of moisture in EtOH can be removed by putting sodium wires in it. Reason (R) : Sodium reacts with water to produce H_(2).

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
17.

Assertion (A) : KO_(2) is paramagnetic. Reason (R ) : It has one unpaired electron in its pi*2p orbital.

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
18.

Assertion (A) : It is impossible to determine the exact position and exact momentum of an electron simultaneously. Reason (R) : The path of an electron in an atom is clearly defined

Answer»

SOLUTION :ASSERTION is true and reason is false. As per Heisenberg.s uncertainty principle, the EXACT POSITION and exact momentum of an electron cannot be determined simultaneously.So, the PATH of electron in an atom is not clearly defined.
Discussion
19.

Assertion (A) : Isotopes of a given element show the same type of chemical behavior. Reason (R ) : The chemical properties of an atom are governed by the number of electrons in the atom.

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
Both AAND R are false

ANSWER :A
Discussion
20.

Assertion (A): It is impossible to determine the exact position and exact momentum of an electron simutaneously Reason (R) : The path of an electron in an atom is clearly defined

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 :Correct R. The path of an electron in an atom is not CLEARLY defined because its position cannot be measured with absolute ACCURACY.
Discussion
21.

Statement-I: Ionization enthalpy of nitrogen is greater than that of oxygen.Statement-II: Nitrogen has exactly half filled electronic configuration which is more stable than electronic configuration of oxygen.

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 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

Answer :a
Discussion
22.

(A): Ionosphere contains gases in the ionised form which form the bases for wireless communication (R): The ions reflect back the radio waves to the earth.

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
23.

Assertion (A) : Ionisation energy (I.E_(1)) of Ga is less than Al. Reason (R) :Ga has a larger atomic size than Al.

Answer»

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

Solution :`IE_(1)` of GA is more than Al, and atomic size of Ga is less than Al. It is due to poor shielding of f-electrons.
Discussion
24.

Assertion (A) : Introduction of catalyst does not affect position of equlibrium. Reason (R): For a reversible reaction, presence of a catalyst influences both forward & backward reaction reacts to same extent.

Answer»

both A & R are true, R is the correct EXPLANATION of A
both A & R are true, R is not correct explanation of A
A is true, R is false
A is false, R is true

Solution :Catalyst influence `K_(F)` and `K_(p)` to same extent
Discussion
25.

Assertion (A) : In water, orthoboric acid acts as a weak monobasic acid. Reason (R) : In water orthoboric acid acts as a proton donor.

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
26.

Assertion (A) :In water ,HCl and HNO_3 have same strength . But their strength in acetic acid are different . Reason ( R ): Acetic acid is stronger acid that water.

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

SOLUTION :Levelling effect in `H_2O `but DIFFERENTIATED in`CH_3 COOH`
Discussion
27.

Assertion (A) : Increasing order of acidity of hydrogen halides is HF lt HCl lt HBr lt HI. Reason (R) : While comparing acids formed by the elements belonging to the same group of periodic table, H-A bond strength is a more important factor in determining acidity of an acid than the polar nature of the bond.

Answer»

Both A and Rare trueand R is the CORRECT explanation of A.
Both A and Rare truebutR is NOTTHE correct explanation of A.
A is TRUE but R is false.
Both A and R are false.

Answer :A
Discussion
28.

Assertion (A) : Increasing order of acidity of hydrogen halides is HF lt HCl lt HBr lt HI Reason (R) : While comparing acids formed by the elements belonging to the same group of periodic table, H - A bond strength is a more important factor in determining acidity of an acid than the polar nature of the bond.

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 :Both assertion and reason are correct and reason is the correct explanation of assertion. In the hydrogen halides, the HI is strongest acid while HF is the weak acid. It is because while COMPARING acids formed by the elements belonging to the same GROUP of periodic table, H-A bond strength is a more IMPORTANT factor in DETERMINING ACIDITY of an acid than the polar nature of the bond.
Discussion
29.

Assertion (A): In the resonance structure of nitrobenzene, Nitro group accept the bonding electron pair pi-bond from benzene Reason (R ): In the resonance structure of nitrobenzene negative charge is not present on ortho and para position

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 nitro group oxygen is attach with nitrogen. ELECTRONEGATIVITY of oxygen `gt` nitrogen so in nitrogroup bonding electron pair of `pi`bond of N=O migrated due to RESONANCE at this time electron pair of alternate `pi`bond of benzene comes out of ring

No electron pair on N so it get from aromatic ring

No, `e^(-)` pair on N of `-NO_(2)`, so it is not capable to gave `e^(-)` pair therefore it get `e^(-)` pair from aromatic ring.
Right: The NEGATIVE charge is not PRESENT at ortho -para position of `-NO_(2)` in nitrobenzene because in resonance structures of nitrobenzene, He ortho -para position are positive charge

In above resonance structures of nitrobenzene (II), (III) and (IV) the positive charge present at o-p position but negative charge is not present
Discussion
30.

Assertion (A): In the resonance structure of aniline the NH_(2) group donate electron pair of nitrogen to the benene ring Reason (R ): In aniline artho and para position of -NH_(2) group possess negative charge

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 amino group hydrogen is attach with N. The electronegativity of nitrogen is more than hydrogen. So the non-bonding ELECTRON pair on nitrogen MOVE TOWARDS the aromatic contain so electron pair of N SHIFT in benzene ring.
Discussion
31.

Assertion (A) : In the reaction between potassium permanganate and potassium iodide, permanganate ions act as oxidising agent. Reason ( R) : Oxidation state of manganese changes from +2 to +7 during the reaction.

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 :`10KI+overset(+7)(2KMnO_(4))+8H_(2)SO_(4)tooverset(+2)(2MnSO_(4))+6K_(2)SO_(4)+8H_(2)O+5I_(2)`
Oxidation STATE of MN decreases from +7 to +2.
Discussion
32.

Assertion (A) : In the reaction between potassium permanganate and potassium iodie permangnate ions act as oxidising agent Reson (R ) : oxidation state of manganese changes form +2 to +7 during the reaction

Answer»

both a and r are ture and r is the correct EXPLANTION of a
both a and r are ture but r is not the correct xplanatio of a
a is true but r is flase
both a nad r are flase

Solution :Correct R oxidation STATE of MN decreases form +7 to +2
Discussion
33.

Assertion (A) In the electrolysis of aqueous NaCl, Na is preferentially discharged at the mercury cathode forming sodium amalgam. Reasons (A) It is due to the fact that hydrogen has a high over voltage at mercury cathode.

Answer»


SOLUTION :REFER A-level INFORMATION.
Discussion
34.

Assertion (A): In the dissociation of PCl_5 at constant pressure and temperature addition of helium at equilibrium increases the dissociation of PCl. Reason (R) : Helium removes Cl_2 from the field of action.

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 :Assertion is true but reason is false.
`PCl_5 to PCl_3 +Cl_2`
At constant pressure, when helium is added to the equilibrium, VOLUME increases. Thus, in order to maintain the K constant, degree of dissociation of `PCl_5` increases. Helium is unreactive TOWARDS chlorine gas.
Discussion
35.

Assertion (A): In the dissociation of PCI_5 at constant pressure and temperature addition of helium at equilibrium increases the dissociation of PCI_5 Reason (R) : Helium remove Cl_2 from the field of aciton.

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 :(A) is wrong but (R) is correct
Discussion
36.

Assertion (A) : In the dissociation of PCl_(5) at constant pressure and temperature addition of helium at equilibrium increases the dissociation of PCl_(5).

Answer»

Both A and Rare trueand R is the correct explanation of A.
Both A and Rare truebutR is NOTTHE correct explanation of A.
A is TRUE but R is false.
Both A and R are false.

Solution :Correct R. To keep pressure constant, ADDITION of helium is ACCOMPANIED by increase in volume of the reaction mixture.
Discussion
37.

Assertion (A) : In rutherford'sgold foil experiment, very few alpha particle are defected back Reason (R ) : Nuclearpresent inside the atom is heavuy

Answer»

If both (A) and (R ) correct and (R ) is the CORRECTEXPLANATION for (A)
If both (A) and (R ) correct and (R ) is the correctexplanation for (A)
If (A) is correct but (R ) is incorrect
If both (A) and (R ) are incorrect

Solution :Nuclear present INSIDE the atom occupies SMALL VOLUME and only very few `ALPHA` particle are reffected back
Discussion
38.

Assertion (A): In paper chromatography, the compound is identify on the base of R_(f) value.Reason (R ): The R_(f) value of every compound is definate and constant

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 :`R_(f)` is retardation factor
`R_(f) = ("Distance moved by the substance from BASE LINE")/("Distance moved by the solvent from base line")`
`R_(f)` vlaue of EVERY compound is definite and constant like boiling POINT, melting point, density etc. So, on the base of `R_(f)` value to get the name of compound
Discussion
39.

Assertion (A): In Haber's process, NH_3 is liquefied and removed. Reason (R): Because of the reaction keeps moving in the backward direction

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
40.

Assertion (A): In DNA molecule, two helical nucleic acid chains hold together. Reason (R): Hydrogen bonds play an important role in the structure of deoxyribonucleic acid.

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.

Answer :a
Discussion
41.

Assertion (A): In column chromatography silica gel or alumina is filled in tube and compound is charged from upper side. Reason (R ): Proper liquid pass through column so by opening stop cock the components of mixture separated

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 :The components in MIXTURE in column possess different distribution. So with different speed the particles migrate with different speed in silica gel because of different distribution particles separated
Discussion
42.

Assertion (A) In any ionic solid (MX) with Schttky defects, the number of positive and negative ions is the same. Reason(R)Equall number of cation and anion vacancies are present.

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 :A
Discussion
43.

Assertion (A) : In a multi-electron atom, the electrons in different subshell have different energies. Reason (R ) : Energy of an orbital depends upon n + l value.

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
Both Aand R are false

Answer :A
Discussion
44.

Assertion (A) : If the dissolution process is endothermic , the increase in temperature will shift the equilibrium towards right Reason ® : This is according to Le-Chatelier princeple.

Answer»

Both (A) and ® are TRUE ® is the CORRECT explanation of (A)
Both (A) and ® are ture and ® is not the correct explanation of (A)
(A) true but ® false
Both (A) and ® are false

ANSWER :A
Discussion
45.

Assertion (A) : If evaporation is carried out in a closed container then the vapour remains in contact with the surface of the liquid. Reason ® : During which they collide with each other and also with the walls of the container .As the collision is of the container .As the collision is inelastick ,they lose their energy

Answer»

Both (A) and ® are true ® is the correct EXPLANATION of (A)
Both (A) and ® are TURE and ® is not the correct explanation of (A)
(A) true but ® false
Both (A) and ® are false

ANSWER :C
Discussion
46.

Assertion (A): If BOD level of water in a reservoir is more than 5 ppm it is highly polluted. Reason(R): High biologiçal oxygen demand means high activity of bacteria in water

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
47.

Assertion (A): If BOD level of water in a reservoir is less than 5 ppm it is highly polluted. Reason (R): High biological oxygen demand means low activity of bacteria in water.

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 Assertion. If BOD level is less than 5 PPM, water is almost PURE
Correct Reason. HIGH BIOLOGICAL oxygen demand means high activity of bacteria in water
Discussion
48.

Assertion (A) : If BOD level of water in a reservoir is less than 5 ppm it is highly polluted. Reason (R) : High biological oxygen demand means low activity of bacteria in water.

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 :To breakdown the ORGANIC matter present in a certain volume of a sample of water AMOUNT of oxygen and required by bacterica known as BIOCHEMICAL Oxygen Demand (BOD). If BOD level is less than 5 ppm. water is almost pure. High biological oxygen demand MEANS high activity of bacteria in water.
Discussion
49.

Assertion (A): If aluminum atoms replace a few silicon atoms in three dimensional network of silicon dioxide, the overall structure acquires a negative charge. Reason (R) : Aluminum is trivalent while silicon is tetravalent.

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 :Al is TRIVALENT and Si is tetravalent and Reason is correct. Here the silicon is doped with group-13 elements.
Discussion
50.

Assertion (A) : If aluminium atoms replace a few silicon atoms in three dimensional network of silicondioxide, the overallstructureacquiresa negative charge. Reason (R) :Aluminiumis trivalent while silicon is tetravalent.

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::C
Discussion