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.

The molecule with largest dipole moment is:

Answer»

`CH_4`
`CHCl_3`
` CCl_4`
`CHl_3`

ANSWER :B
Discussion
2.

Molecularity of the reaction is determined by _________.

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ONE molecule
two molecule
three molecules
total number of molecules in R.D.S(Rate DETERMINING STEP)

ANSWER :D
Discussion
3.

Molecularity of an elementary reaction

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MAY be zero
is ALWAYS INTEGRAL
may be semi-integral
may be integral, FRACTIONAL or zero

Answer :A
Discussion
4.

The molecularity of a reaction can never be a fraction.

Answer»
Discussion
5.

Molecular weight of urea is 60. A solution of urea containing 6 g urea in one litre is

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1 molar
1.5 molar
0.1 molar
0.01 molar

SOLUTION :`C=(6)/(60)=0.1` molar.
Discussion
6.

Molecular weight of tribasic acis is W. its equivalent weight will be :

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W/2
W/3
W
3W

Answer :B
Discussion
7.

Molecularity of a reaction cannot be zero.

Answer»
Discussion
8.

Molecular weight of oxalic acid is 126 the weight of oxalic acid required to neutralise 1000ml of normal solution of NaOH is :

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126 g
63 g
6.3 g
12.6 g

Answer :B
Discussion
9.

Molecular weight of macromolecules are determined by:

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ELEVATION of BOILING point
Depression in FREEZING point
Osmotic pressure
None of these

Answer :C
Discussion
10.

Molecular weight of acids can be determined by

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Silver salt METHOD
Volumetric method
Plants CHLORIDE method
Victor mayer's method

Solution :Molecular WEIGHTS of acids can be determined by silver salt method and volumetric method, (c ) is used for organic bases, (d) is used for determining molecular weight of organic COMPOUND.
Discussion
11.

Molecular weight of biomolecules such as protein can be determined by "____________" method.

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OSMOTIC pressure measurement.
Depression in FREEZING point measurement
Elevation in BOILING point meansurement
Vapour pressure meansurement.

Solution :As osmotic pressure can be MEASURED accuretely using Berkley HARTLEY's method.
Discussion
12.

Molecular weight of compound (A) is :

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58
120
60
182

Solution :
So MOLECULAR mass=58
Discussion
13.

Molecular weight of anhydrous aluminium chloride is :

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`267.0`
`133.5`
`241.5`
`483.0`

ANSWER :A
Discussion
14.

Molecular weight of a gas that diffuses twice as rapidly as the gas will molecular weight 64 is:

Answer»

16
8
64
6.4

Answer :A
Discussion
15.

Molecular weight of a gas that diffuses twice as rapidly as the gas with molecular weight 64 is

Answer»

16
8
64
6.4

Solution :`M_(1)=64, r_(2) = 2r_(1)`
`M_(2)=M_(1)[(r_(1))/(r_(2))]^(2)=64xx(1)/(4)=16`
Discussion
16.

Molecular weight of a protein is

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10000
1,000-10,000
100-1,000
greater than 10,000

Answer :D
Discussion
17.

Molecular weight of a gas is 11.2 litre of which at NTP weights 14g is

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28
`14 XX 11.2`
14
`14//11.2`

ANSWER :A
Discussion
18.

Molecular solids contains neutral molecules held together by …………………

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STRONG COHESIVE forces
weak VANDERWAALS forces
weak ionic forces
strong ELECTROSTATIC forces

SOLUTION :weak vanderwaals forces
Discussion
19.

Molecular shapes of SF_(4),CF_(4),XeF_(4) are

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the same with 2,0 and 1 LONE PAIRS of ELECTRONS respectively
the same with 1,1 and 1 lone pairs of electrons respectively
different with 0,1 and 2 lone pairs of electrons respectively
different with 1,0 and 2 lone pairs of electrons respectively.

Answer :D
Discussion
20.

Molecular shapes of SF_(4),CF_(4) and XeF_(4) are :

Answer»

the same with 2,0 and 1 LONE PAIR of ELECTRONS respectively
the same with 1,1 and 1 lone pair of electrons respectively
the same with 0m1 and 2 lone pair of electrons respectively
the same with 1,0 and 2 lone pair of electrons respectively

Answer :D
Discussion
21.

Molecular shapes of SF_(4), CF_(4) and XeF_(4) are

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The same , with 2,0 and 1 lone PAIR of electrons respectively.
The same with 1,1 and 1 lone pair of electrons respectively
Different with 0,1 and 2 lone PAIRS of electrons respectively
Different with 1,0 and 2 lone pairs of electrons respectively.

Answer :D
Discussion
22.

Molecular orbital theory was developed mainly by

Answer»

PAULING
pauling and slater
mulliken
THOMSON

ANSWER :C
Discussion
23.

Molecular mass of NaCl determine by osmotic pressure measurement is found to be half of the actual value. Account for it .

Answer»

SOLUTION :It is due to DISSOCIATION of NaCl to `Na^+` and `Cl^(-1)` ions. So the colligative properties will be almost double and HENCE the molecular mass CALCULATED will be almost half of the actual molecular mass.
Discussion
24.

Molecular mass of drugs usually is in the range of

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`10-100 MU`
`100-500 mu`
`500-1000 mu`
`1000-10000 mu`

ANSWER :B
Discussion
25.

Molecular mass of a volatile substance may be measured by :

Answer»

HOFMANN method
Carius method
Victor MEYER's method
Leibig method

Answer :C
Discussion
26.

Molecular mass of a volatile organic solid can be deternmine by:

Answer»

SILVER CHLORIDE
plantic chloride METHOD
VICTOR Meyer'smethod
KJELDAHL's method

Solution :N//A
Discussion
27.

Molecular formula of trimetaphosphoric acid and diphosphoric acid respectively is.........and ..........

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`H_(5)P_(3)O_(10), H_(3)PO_(2)`
`H_(5)P_(3)O_(10), H_(4)P_(2)O_(7)`
`H_(3)PO_(3), H_(4)P_(2)O_(7)`
`HPO_(3), H_(4)P_(2)O_(7)`

Answer :B
Discussion
28.

Molecular formula(A)C_4H_10O on acid hydrolysis gives two mole of same alcohol.The compound A is

Answer»

2-methoxy propane
1-methoxy propane
t-butyl alcohol
Diethyl ether

Answer :D
Discussion
29.

Molecularforumula of sulpapyridine is

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`C_(11)H_(11)N_(3)O_(2)S`
`C_(12)H_(13)N_(5)O_(2)S`
`C_(12)H_(13)N_(5)O_(2)S`
`C_(12)H_(13)N_(5)O_(2)S`

ANSWER :A
Discussion
30.

Molecular formular C_(3) H_(6) Br_(2) can have (including stereoisomers):

Answer»

Two gem dibromide
One VIC dibromide
Two TERTIARY dibromo alkane
Two SECONDARY dibromo alkane

Answer :A
Discussion
31.

Molecular formula of tetraammineaquachloridocobatle (III) chloride is ………….

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`[Co(NH_(3))_(4)(H_(2)O)CL]Cl_(3)`
`[Co(NH_(3))_(4)(H_(2)O)Cl]Cl_(2)`
`[Co(NH_(3))_(4)(H_(2)O)]Cl_(3)`
`[Co(NH_(3))_(4)(H_(2)O)Cl_(3)]Cl_(2)`

ANSWER :B
Discussion
32.

Molecular formula of smallest ester which contain one chiral carbon is :

Answer»

`C_(4)H_(8)O_(2)`
`C_(5)H_(12)O`
`C_(6)H_(12)O_(2)`
`C_(5)H_(10)O_(2)`

Answer :D
Discussion
33.

Molecular formula of Tear gas is ……………

Answer»

`C""Cl_(3)NO_(2)`
`C""Cl_(2)(NO_(2))_(2)`
`CHCl_(2)NO_(2)`
`C""Cl(NO_(2))_(3)`

ANSWER :A
Discussion
34.

Molecular formula of pentahydroxy acid obtained when glucose is oxidised with Br_(2) water is

Answer»

`C_(6)H_(12)O_(7)`
`C_(6)H_(12)O_(8)`
`C_(6)H_(12)O_(6)`
`C_(6)H_(10)O_(6)`

ANSWER :A
Discussion
35.

Molecular formula of pencillin is C_(9) H_(11) O_(4) N_2SR. The incorrect matching is._

Answer»

R = Benzyl penicillin ------ penicillin G
R = `CH_2 - C_6H_4 - OH` ------ penicillin X
R = pent - 2 - enyl ------- AMYL penicillin
`R = (CH_2)_6 -CH_2 `------- n - heptyl penicillin

Answer :C
Discussion
36.

Molecular formula of Glauber's salt is:

Answer»

`MgSO_4. 7H_2O`
`CuSO_4. 5H_2O`
`FeSO_4. 7H_2O`
`Na_2SO_4. 10H_2O`

ANSWER :D
Discussion
37.

Molecular formula of Ethers is :

Answer»

`C_nH_(2N+2)OH`
`C_nH_(2n)O`
C_nH_(2n+1)O`
NONE of these

Answer :D
Discussion
38.

The molecular formula of DDT has ___________.

Answer»

5 CL atoms
4 Cl atoms
3 Cl atoms
2 Cl atoms

Answer :A
Discussion
39.

Molecular formula of chloropicrin is

Answer»

`CHCl_(3)NO_(2)`
`C Cl_(3)NO_(3)`
`C Cl_(2)NO_(2)`
`C Cl_(3)NO_(2)`

Solution :MOLECULAR FORMULA of chloropicrin is `C Cl_(3)NO_(2)`
Discussion
40.

Molecular formula of cimetidine is

Answer»

`C_(13)H_(22)N_(4)O_(3)S`
`C_(10)H_(14)N_(4)S`
`C_(29)H_(36)O_(2)`
`C_(29)H_(34)O_(2)`

Answer :B
Discussion
41.

Molecular formula of chlormphenicol is

Answer»

`C_(11)H_(11)N_(3)O_(2)S`
`C_(12)H_(13)N_(5)O_(2)S`
C_(11)H_(12)CI_(2)N_(2)O_(5)`
`C_(12)H_(12)As_(2)N_(2)O_(2)`

Answer :C
Discussion
42.

Molecularformula of chloramphinicol is

Answer»

`C_(10)H_(18)O`
`C_(8)H_(9)CIO`
`C_(12)H_(6)CI_(4)O_(2)S`
`C_(11)H_(12)CI_(2)N_(2)O_(5)`

Answer :D
Discussion
43.

The molecular formula of BHA is''

Answer»

`C_(11)H_(20)O_(2)`
`C_(11)H_(14)O`
`C_(8)H_(16)O_(2)`
`C_(11)H_(16)O_(2)`

Answer :D
Discussion
44.

Molecular formula of acetone semicarbazone

Answer»

`CH_3-UNDERSET(H)underset(|)C=N-H`
`CH_3- underset(CH_3)underset(|)C="NN"HCONH_2`
`CH_3-underset(H)underset (|)C=N-NH-CO-NH_2`
`CH_3underset(CH_3)underset(|) C=N-NH-C_6H_3(NO_2)_2`

Answer :B
Discussion
45.

Molecular formula C_(4)H_(8)O_(2)shows (1) chain isomerism(2) metamerism (3) functional isomerism (4) optical isomerism

Answer»

`1,2,3`
`3,4`
`2,3,4`
all of these

Answer :A
Discussion
46.

Molecular formula C_(4)H_(8)O_(2) on acid hydrolysis gives acetic acid and ethanol. The structures of C_(4)H_(8)O_(2) will be

Answer»




ANSWER :B
Discussion
47.

Molecular formula C_(4)H_(8)O oxidation gives acetic acid . The structure of C_(4)H_(8)O_(2) will be

Answer»




ANSWER :B
Discussion
48.

Molecular formula C_(4)H_(6) have two position isomers A and B. Both A and B isomer decolourised the bromine water. B release H_(2) gas with sodium metal but isomer A does release H_(2) gas. Write IUPAC name of A and B.

Answer»


SOLUTION :N//A
Discussion
49.

Molecular formula C_(4)H_(7)N on acid hydrolysis gives 2- methyl propanoic acid . The possible structure of C_(4)H_(7)N will be

Answer»




ANSWER :C
Discussion
50.

Molecular formula C_(4)H_(4)O_(4) can have various structures: (i) a cyclic ester (A) (i) a dibasic acid (B) that on heating is converted into acrylic acid. (ii) a dibasic acid (C) that foms meso tartaric acid with alkaline KMnO_(4). (iv) a dibasic acid (D) that forms racemic mixture of tartaric acid with alkaline KMnO_(4). Assign structures to (A), (B), (C) and (D).

Answer»

SOLUTION :
Discussion