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.

Number of moles of O_2 gas evolved bythe decomposition of 1 lit of 1N H_2O_2 solution is

Answer»

0.5
0.375
0.25
1

Answer :C
Discussion
2.

How many moles of KMnO_(4) are required to oxidise one mole of ferrous oxalate in acidic medium ?

Answer»

7.5 moles
0.2 moles
0.6 moles
0.4 moles

Answer :C
Discussion
3.

Number of moles of KMnO_(4) required to oxidize one mole of Fe(C_(2)O_(4)) in acidic medium is _____

Answer»

0.6
1.67
0.2
0.4

Answer :C
Discussion
4.

Number of moles of K_(2)Cr_(2)O_7 , reduced by one mole of Sn^(2+) ions is 1/x.The value of x is

Answer»


Solution :`Cr_(2)O_(7)^(-2)+14H^(+) +3SN^(2+) rarr2Cr^(3+) +3Sn^(+4) +7H_(2)O`.
Thus ,1 moles of `Sn^(2+)`reduces `1/3` moles of `K_(2)Cr_(2)O_7`
Discussion
5.

Number of moles of K_(2)Cr_(2)O_(7) that can be reduced by 1 mole of Sn^(2+) ions is :

Answer»

`1//3`
`3//2`
`5//6`
`6//5`

SOLUTION :The redox reaction is :
`Cr_(2)O_(7)^(2-)+14H^(+) +3Sn^(2+) to 2Cr^(3+)+7H_(2)O+3Sn^(4+)`
`THEREFORE 1 " mole of " Sn^(2+)` will reduce `1//3 " mole of " K_(2)Cr_(2)O_(7)`
Discussion
6.

Number of moles of K_(2)Cr_(2)O_(7) reduced by one mole of Sn^(2+) is :

Answer»

`1//3`
`3`
`1//6`
`6`

SOLUTION :N//A
Discussion
7.

Number of moles of KMnO_(4) required to oxidize one mole of Fe(C_(2)O_(4)) in acidic medium is

Answer»

`0.6`
`0.167`
`0.2`
`0.4`

ANSWER :A
Discussion
8.

Number of moles of K_(2)Cr_(2)O_(7) reduced by 1 mole of Sn^(2+) is ____

Answer»

`1/6`
`1/3`
`2/3`
1

Answer :B
Discussion
9.

Number of moles of hydrogen peroxide that can oxidise one mole of lead sulphide to lead sulphate is

Answer»

1
2
4
8

Answer :C
Discussion
10.

Number of moles of FeSO_4 that can reduce one mole of permanganate in aqueous acid solution is

Answer»

2
4
5
7

Answer :C
Discussion
11.

Number of moles of electrons shared in the formation of a dioxygen molecule .

Answer»

2
4
`4 XX 1.6 xx 10^(-24)`
`4 xx 6 xx 10^(-23)`

ANSWER :C
Discussion
12.

Number of moles of Cul (K_(sp) = 5 xx 10^(-12)) that will dissolve in 1 L of 0.1 M Nal solution is

Answer»

`2.2 XX 10^(6) `
` 5xx10 ^(-11)`
` 5xx10^(-10)`
` 2.2 xx 10^(-5)`

Solution :` CU IhArr Cunderset( s) u ^(+1)+ underset( 0.1) I^(-) `
`S xx 0.1 = 5 xx 10 ^(-12)= S = 5 xx 10 ^(-11) `
Discussion
13.

Number of molecules of an ideal gas present in a flask of volume 2 L are 10^(23). The mass of each gas molecule is 6.64xx10^(-23)g and the root mean square velocity of the molecules is 4.33xx10^(4)cm*s^(-1). Hence-

Answer»

pressure of the GAS is 3.27 atm
average kinetic energy of each molecule is `6.63xx10^(-14)J`
total kinetic energy of the molecules is `6.23xx10^(9)J`
total kinetic energy of the molecules is `1.492xx10^(5)J`

Answer :B::C
Discussion
14.

Number of molecules in which steric inhibition of resonance is observed is

Answer»


Solution :In C,D,E RESONANCE is not possible due to SIR
In b,c,d,e the bulky GROPUS present at ortho position inhibit DELOCALISATION.
Discussion
15.

The number of molecules in one litre of air at STP is

Answer»

`(6.02 XX 10^(23))/(32)`
`(6.02 xx 10^(23))/(22.4)`
`32 xx 22.4`
`(32)/(22.4)`

ANSWER :B
Discussion
16.

Number of metals presents in 'alnico' alloy is

Answer»


Solution :Alnico alooy CONTAINS FE, Al, NI and Co metals.
Discussion
17.

Number of meso isomers of he given compound is

Answer»


SOLUTION :
Discussion
18.

Number of meso somer of the given compound is :

Answer»

1
2
3
0

Solution :
Discussion
19.

Number of measurable parameters of a gas is

Answer»

1
2
3
4

Answer :D
Discussion
20.

Number of lone pair (s) present in the structure ofHNO_(3) is

Answer»


SOLUTION :
THUS , these are 7 LONE PAIRS of electons
Discussion
21.

Number of linear atoms in acetylene molecues is a maximum of

Answer»

1
2
3
4

Answer :D
Discussion
22.

Number of isotopes of hydrogen are :

Answer»


SOLUTION :THREE, i.e., H, D and T
Discussion
23.

Number of isomers possible for dichlorocyclohexane

Answer»

8
9
6
7

Solution :4-structral ISOMERS (1,1,1,2,1,3,1,4)
3-geomentric isomers (1,2,1,3,1,4)
1-optical ISOMER(1,3)
Discussion
24.

Number of isomers possible for dichloro cyclohexane

Answer»

8
9
6
7

Solution :Number of POSSIBLE isomers (8) 1, 2 dichloro CYCLOHEXANE

1, 3 dichloro CYCLO hexane
Discussion
25.

Number of isomers for the compound dihydroxy benzene

Answer»

1
2
3
4

Solution :
Discussion
26.

Number of nucleons in D_(2) molecule is

Answer»

1
2
3
4

Answer :D
Discussion
27.

Number of hexagonal rings in borax.

Answer»


Solution :BORAX CONTAINING two hexagonal RINGS.
Discussion
28.

Number of hexagonal rings in boran

Answer»


ANSWER :2
Discussion
29.

Number of HCl molecules present in 10 mL of 0.1 N HCl solution is

Answer»

`6.022 XX 10^(23)`
`6.022 xx 10^(22)`
`6.022 xx 10^(21)`
`6.022 xx 10^(20)`

ANSWER :D
Discussion
30.

Number of H_(2) molecules attached to each H_(2)O molecule through hydrogen bonding is

Answer»


Solution :Each `H_(2)`MOLECULE
is LINKED to 4 other MOLECULES tetrahedrally .
Discussion
31.

Number of g of oxygen in 32.2 g Na_(2)SO_(4)* 10H_(2)O (Mol. omega t = 322) is .........

Answer»

`16.0`
2.24
18
22.4

Answer :B::D
Discussion
32.

Number of gram equivalents of solute in 100ml of 5NHCl solution is

Answer»

50
500
5
0.5

Solution :No. GRAM EQUIVALENTS `= (N XX V("in ml"))/(1000)`
Discussion
33.

Number of geometrical isomers for the for the following compound will be :

Answer»


SOLUTION :N//A
Discussion
34.

Number of faraday required to convert 1 mol Cr_(2)O_(7)^(2-) to Cr^(3+) ion is....

Answer»


ANSWER :6
Discussion
35.

Number of elements present in 5th period is.....

Answer»

8
18
32
24

Answer :B
Discussion
36.

Number of electrons transferred from one atom to another during bond formation in SrS (Strontium Sulphide)

Answer»

1
2
3
4

Solution :`SR^(2+)S^(2-)` (TWO ELECTRONS are TRANSFERRED)
Discussion
37.

Number of electrons taken up by nitrogen atom when a NO^(+)ion is reduced to NH_(2)OHis:

Answer»


SOLUTION :`NO^(+)+3H^(+)+4E^(-) rarr NH_(2)OH`
Discussion
38.

Number of electrons transferred from one Al atom during bond formation in Aluminium fluoride

Answer»

1
2
3
4

Answer :C
Discussion
39.

Number of electrons present in P^(-3) ion having 15 protons a r e ......

Answer»

15
16
18
12

Solution :No. of protons - 15 `therefore`ATOMIC no = Z = 15 `therefore`Neutral ATOM must have 15 electrons P-3 has - 3 CHARGE `therefore`It has additional 3 electrons `therefore`Total electrons = (15 + 3) - 18
Discussion
40.

Number of electrons involved in the reduction of Cr_(2)O_(7)^(2-) ion in acidic solution to Cr^(3+)is

Answer»

3
4
2
6

Solution :`{:(Cr_(2)O_(7)^(-2)RARR, 2Cr^(3+)),(14H^(+),+7H_(2)O),(+6e^(-),):}`
Discussion
41.

Number of electrons forming bonds in O_(2) molecule according to valency bond theory.

Answer»

2
4
6
10

Answer :B
Discussion
42.

Numberof double bonds in gammaxene(BHC) is

Answer»

3 
2 
1 
0 

ANSWER :D
Discussion
43.

Number of electron-rich hydrides among the following are : CH_(4),NH_(3),PH_(3),H_(2)O,H_(2)S,BH_(3),HF,AlH_(3),AsH_(3).

Answer»


Solution :SIX, i.e., `NH_(3), PH_(3), H_(2)O, H_(2)S, HF,AsH_(3)`
Discussion
44.

Number of delocalised electrons in C_6H_6molecule is

Answer»

9
6
4
3

Answer :B
Discussion
45.

Number of correct statements are : DeltaU =nC_(Vm)Delta T is applicable for ideal gas undergoing reversible process but not irreversibe (No chemical and phase change) DeltaS =nC_(Vm)Delta T is applicable for ideal gas undergoing reversible process but not irreversible (No chemical and phase change) DeltaS=nC_(Vm)ln"(T_(2))/T_(1)+nRln'(V_(2))/V_(1) is applicable for ideal gas undrgoing reversible as well as irreversibel process (No chemical and phase change ) DeltaH=DeltaU+Delta(PV) isapplicable for chemical and phase change carried out reversibly or irreversibly PV^(gamma) = constant for reversible and irreversible adiabatic process involving ideal gas.

Answer»


ANSWER :2
Discussion
46.

Number of collinear carbons in 2,4-hexa diyne

Answer»

3
2
6
4

Answer :C
Discussion
47.

Number of chiral centers generated during monochlorination in the above reaction:

Answer»

1
2
3
4

Answer :B
Discussion
48.

Number of chiral centres present in above compound. Number of teoretically possible stereoisomer of above compound. Degree of unsaturation (DBE) of above compound.

Answer»


Solution :(a) 5
(b) Steresisomer = `2^(N)=2^(6)=64` where n stereogenic area
(c ) SIX (THREE `pi` bond and ONE monocyclic RING one bicyclic ring)
Discussion
49.

Number of chiral carbons inDiosgenin are :

Answer»


SOLUTION :
Discussion
50.

Number of chiral C-atoms present in 1,3-dimethyl cyclobutane

Answer»


SOLUTION :ZERO CHIRAL
Discussion