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 p-disubstituted benzene compounds possible with molecular formula C_(8)H_(11)N is

Answer»


SOLUTION :
Discussion
2.

Number of oxygen atos between two chromium atoms in Cr_(2)O_(7)^(2-) ion is .....

Answer»


ANSWER :B::D
Discussion
3.

Number of oxygen atoms in an acetamide molecule is

Answer»

1
2
3
4

Solution :Formula of ACETAMIDE is `CH_(3)CONH_(2)` which CONSIST of single OXYGEN ATOM.
Discussion
4.

Number of oxide orwesd among , (i) Cassiterite (ii) pyrolusite (iii) Kieserite (iv) Azurite (V) chromite (vi) siderite are.

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ANSWER :3
Discussion
5.

Number of optically inactive stereoisomers of the following molecule is . CH_3-CH=CH-undersetunderset(OH)(|)CH-CH=CH-undersetunderset(OH)(|)CH-CH=CH-CH_3

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SOLUTION :No of OPTICALLY inactive isomers `=2 (n-1)/2 =2 (5-1)/2=2 4/5 =2^2 =4`
Discussion
6.

(Number of organic product formed.)

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SOLUTION :N//A
Discussion
7.

Number of optically active tartaric acid is/are possible :

Answer»

1
2
3
4

Solution :N//A
Discussion
8.

Number of optically active isomers of compound [M(AB)b_(2)c_(2)]^(+-n)

Answer»


SOLUTION :
Discussion
9.

Number of optically active isomer is/are :

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0
1
2
3

Solution :N//A
Discussion
10.

Number of optically active isomer is/are :

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0
1
2
3

Solution :N//A
Discussion
11.

Number of nodal planes for f-orbital are

Answer»

3
2
1
0

Answer :A
Discussion
12.

Number of nitrogen atoms present in melamine isx.The number of-imine and - amine groups is y and z,x,y and z are respectively

Answer»

3,1,2
6,1,3
6,3,3
6,3,1

Solution :No. of HYDROGEN ATOMS SIX
No. of IMINE groups three
No. of amine groups three
Discussion
13.

Number of nitrogen atoms present in melamine is x. The number of -imine and - amine groups is y and z. x,y and z are respectively.

Answer»

3,1,2
6,1,3
6,3,3
6,3,1

Answer :C
Discussion
14.

Number of Nitrogen atoms in histidine ?

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SOLUTION :HISTIDINE CONTAINS 3 NITROGENS
Discussion
15.

Number of neutrons in a parent nucleus X, which given ._(7)N^(14) nucleus after two successive beta emission would be

Answer»

9
8
7
6

Solution :`._(5)X^(14) OVERSET(-2beta)rarr ._(7)N^(14)` then no. of NEUTRONS in `._(5)X^(14) = 14 - 5 = 9`
Discussion
16.

Number of natural life times (t_(av)) required for a first order reaction to complete 99.9% is

Answer»

`6.93`
`2.31`
`9.2`
infinite

Solution :`t_(99.9) = 10 xx t_(1//2)`
`=10 xx (0*693)/(k) ""(because t_(1//2) = (0*693)/(k))`
`=10 xx 0*693 xx t_(AV)"" (because t_(av) = (1)/(k))`
`= 6*93 xx t_(av), i.e., 6*93` natural life TIMES.
Discussion
17.

Number of monocloro structural isomers of : (i) , overset(Cl_(2)//h v) rarr"" (ii) ,overset(Cl_(2)//h v) rarr

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SOLUTION :
Discussion
18.

Number of natural life times (T_(av)) required for a first-order reaction to achieve 99.9% level of completion is :

Answer»

`2.3`
`6.9`
`9.2`
`0.105`

ANSWER :B
Discussion
19.

Number of moles (P) of HIO_(4) used per moles of compound X is :

Answer»

2
3
4
5

Solution :(A) has one ACETAL linkage THUS is disaccharide.
(B) has one amide linkage .
(C) Oxidation products of aldohexose.
(d) is REDUCTION productsof
Discussion
20.

Number of moles of the solute per kilogram of the solvent is

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MOLE FRACTION
Molality
Molarity
molar MASS

ANSWER :B
Discussion
21.

Number of moles of RMgX consumed during reaction are? , underset(2.H_(3)O)overset(1.RMgX("excess"))rarr

Answer»

2
3
4
5

Answer :B
Discussion
22.

Number of moles of oxygen required for the complete combustion of butane are

Answer»

6
7.5
6.5
7

Answer :C
Discussion
23.

Number of moles of Na_(2)CO_(3) that should be dissolved in 4 litres of the solution to obtain 1 N Na_(2)CO_(3) solution is

Answer»

Solution :No. of moles of `Na_(2)CO_(3)` REQUIRED for 1 L of 1 N solution = 0.5
`THEREFORE` No. of moles of `Na_(2)CO_(3)` required for 4 L of 1 N solution `=4xx0.5=2.`
Discussion
24.

Number of moles of [NH_4OH] required to coagulate 1mole of [Fe(OH)_3]Fe^(+3) are

Answer»

3 
4 
2
1

Solution :`3NH_4OH + [FE(OH)_3]Fe^(+3) to Fe(OH)_3`
MOLES of `NH_4OH` required to COAGULATE `[Fe(OH)_] Fe^(+3)` ion = 3
Discussion
25.

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

Answer»

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

Solution :`Cr_(2)O_7^(-2) + 3SN^(+2) RARR 3Sn^(+4) + 2Cr^(+3)`
Discussion
26.

Number of moles of K_(2)Cr_(2)O_(7) in acidic medium required to oxidize one mole of Cu_(3)P" to " CuSO_(4) " and " H_(3)PO_(4) is :

Answer»

<P>`11/6`
`6/11`
`3/5`
`5/3`

SOLUTION :`6Cu_(3)P + 123H^(+) + 11Cr_(2)O_(7)^(2-) to 18Cu^(2+) + 6H_(3)PO_(4) + 22Cr^(3+) + 53H_(2)O`
Discussion
27.

Number of moles of hydrogen will required for complete hydrogenation of one mole of following compounds :

Answer»

`6`
`7`
`5`
`3`

SOLUTION :Number of mole of HYDROGEN needed is `=` number of double BONDS `=5`
Discussion
28.

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

Answer»

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

Answer :A
Discussion
29.

Number of moles of electrons in 4.2g of N^(3-) ion (nitride ion) is:

Answer»

3
2
1.5
4.2

Answer :A
Discussion
30.

Number of moles of CH_3-OH in acidic medium react with one mole of glucose .

Answer»

1
4
3
5

Answer :B
Discussion
31.

Number of moles of CaO required to remove hardness from 1000 litre water having 324 ppm of calcuim bicarbonate and 74.5 ppm of potassium chloride is :

Answer»

8
4
3
2

Answer :D
Discussion
32.

Number of molecules or ions which has/have any bond angle of 120^(@)is CH_(3)^(-), CH_(3)^(o+), NH_(3), CO_(3)^(2-), BCl_(3), PCl_(5)

Answer»

3
4
5
6

Answer :B
Discussion
33.

Number of moles, mass, volume, enthalpy, entropy and free energy are examples of _____ properties.

Answer»


ANSWER :EXTENSIVE
Discussion
34.

Number of moles in 1 m^(3) gas at NTP are

Answer»

`4.46`
`44.6`
446
4460

Solution :`1M^(3)=10^(3)L=1000L`
`"1 MOLE = 22.4 L"`
`therefore" MOLES present in 1000 L"=(1000)/(22.4)=44.6`
Discussion
35.

Number of molecules in 1 litre of oxygen at NTP is:

Answer»

`(6.02xx10^(23))/(32)`
`(6.02xx10^(23))/(22.4)`
`32xx22.4`
`(32)/(22.4)`

ANSWER :B
Discussion
36.

Number of mole of Grignard comsumed per mol in given molecule.(When grignard reagent is in excess)

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SOLUTION :
Discussion
37.

Number of mole of HIO_(4) required per mol for complatr reaction of alpha-D-methylglycopyranoside.

Answer»


SOLUTION :N//A
Discussion
38.

Number of mole of a substance present in 1 litre volume is known as:

Answer»

Activity
Molar concentration
Active mass
None of the above

Answer :B
Discussion
39.

Number of mole of a substance present in 1 litre volume is known as

Answer»

activity
molar concentration
active MASS
NONE

SOLUTION :MOLARITY `=("Mole of SOLUTE")/("Volume of solution in litre")`
Discussion
40.

Number of Methyl groups in Ibu profen

Answer»


SOLUTION :CONTAIN ` 3CH_3` GROUPS
Discussion
41.

Number of metamers represent by molecular formula C_(4)H_(10)O is

Answer»

4
3
2
1

Solution :Three, these are
`CH_(3)CH_(2)OCH_(2)CH_(3)(I),CH_(3)OCH_(2)CH_(2)CH_(3)(II) and CH_(3)OCH(CH_(3))_(2)(III) ` . Here I and II , I and III are PAIRS of METAMERS.
Discussion
42.

Number of mole of 1 m^3 gas at NTP are :

Answer»

44.6
40.6
42.6
48.6

Answer :A
Discussion
43.

Number ofmetalsamongfollowingwhich are obatainedbyelectromentallurgy in molten state are Li, Ba, Na,Al, Fe, Cu, Pb, Sn, Ag, Zn, Ca, Mg.

Answer»


ANSWER :6
Discussion
44.

Number of meso compounds are possible with molecular formula C_6H_12Cl_2?

Answer»


SOLUTION :
Discussion
45.

Number oflone pairs of electrons on Xe atoms XeF_(2),XeF_(4) and XeF_(6) molecules are respectively

Answer»

3,2 and 1
4,3 and 2
2, 3 and 1
3,2 and 0

Solution :
Discussion
46.

Number of lone pairs electrons on Xe atoms in XeF_(2), XeF_(4) and XeF_(6) molecules are respectively.

Answer»

3,2 and 1
4,3 and 2
2,3 and 1
3,2 and 0

ANSWER :A
Discussion
47.

Number of lone pairs, sigma bonds are pi bonds in A are respectively:

Answer»

1,3,1
7,3,1
6,5,1
7,5,1

Answer :D
Discussion
48.

Number of lone pairs of electrons on Xe atoms in XeF_(2), XeF_(4), XeF_(6) and XeO_(4) molecules are respectively

Answer»

3, 2, 1, 0
1, 3, 2, 0
0, 2, 3, 1
3, 2, 0, 1

Answer :A
Discussion
49.

Number of lone pair and bond pairs present on Xe of XeOF_4molecule is

Answer»

1,2
1,4
1,6
2,4

Answer :C
Discussion
50.

number of ligands in the stable volatile complex formed during the extraction of N I by Mond 's process

Answer»


ANSWER :4
Discussion