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.

Among the following , which is least acidic ?

Answer»

<P>p- nitrophenol
p- chlorophenol
phenol
o- cresol.

Solution :
ELECTRON witdrawing group `(-NO_(2),-Cl)`decreases the electron DENSITY in the ring and thus INCREASES their acidic CHARACTER where as electron donating group `(-CH_(3))` decreases the acidic character by increasing the electron denity in the ring.
Discussion
2.

Among the following which is a fat soluble vitaminVitamin - B_(12), Vitamin - C, Vitamin - D.

Answer»

SOLUTION :VITAMIN - D
Discussion
3.

Among the following which have aromatic character

Answer»




ANSWER :C
Discussion
4.

Among the following, which has the lowest enthalpy of fussion?

Answer»

Flourine
Hydrogen
Chlorine
Helium

Answer :D
Discussion
5.

Among the following, which has the longest half life?

Answer»

`._(90)^(232)Th`
`._(93)^(237)NP`
`._(92)^(238)U`
`._(92)^(235)U`

Answer :a
Discussion
6.

Among the following, which has minimum solubility in water:

Answer»

KOH
CsOH
LiOH
RbOH

Answer :C
Discussion
7.

Among the following which has lowest pKa values ?

Answer»

HCOOH
`CH_(3)COOH`
`(CH_(3))_(2)-CH-COOH`
`CH_(3)-CH_(2)-COOH`

ANSWER :A
Discussion
8.

Among the following which has lowest b.pt

Answer»

`AR`
`He`
`NE`
`XE`

ANSWER :B
Discussion
9.

Among the following which compound will react with Na_(2)CO_(3) solution to give sodium salt and CO_(2) ?

Answer»

Phenol
1- hexanol
FORMIC ACID
ETHANAL

Answer :C
Discussion
10.

Among the following which compound gives precipitate with AgNO_(3) solution?

Answer»




None

Answer :B
Discussion
11.

Among the following which cannot exhibit optical isomerism

Answer»




ANSWER :A
Discussion
12.

Among the following which artificial sweetener one has the lowest sweetness value ?

Answer»

Alitame
Aspartame
Saccharine
Sucralose

Answer :C
Discussion
13.

Among the following which are ambidenatate ligands ?(i) NO_(2)^(-) (ii) NO_(3)^(-) (iii) EDTA^(4-) (iv) C_(2)O_(4)^(2-) (v) SCN^(-)

Answer»

(i) and (II)
(iii) and (iv)
(i) and (v)
(iii) and (VI)

ANSWER :C
Discussion
14.

Among the following, VWF are maximum in :-

Answer»

HBr
LiBr
LiCl
AGBR

SOLUTION :`VWF prop ` molecular WEIGHT
Discussion
15.

Among the following types of voids, which one is the largest void- (A) Triangular system (B) Tetragonal system (C) Monoclinic system (D) Octahedral

Answer»

SOLUTION :(D)
The vacant spaces between the spheres in closed packed structure is called VOID. The voids are of two types, tetrahedral voids and OCTAHEDRAL voids. Also radius of tetrahedral voids and octahedral voids are`r_(void)=0.225xxr_(sphere)`
and `r_(void)=0.411xx r_(sphere)` RESPECTIVELY. Thus, octahedral void is larger than tetrahedral void
Discussion
16.

Among the following vitamins the one whose deficiency causes rickets (bone deficiency) is

Answer»

VITAMIN A
Vitamin B
Vitamin D
Vitamin C

Solution :DEFICIENCY of vitamin D CAUSES RICKETS.
Discussion
17.

Among the following type of voids, which one is the largest void:

Answer»

Triangular
Cubic
Tetrahedral
Octahedral

Answer :D
Discussion
18.

Among the following, total number of planar molecule(s)/ions are : [PtCl_(4)]^(2-),""[Ni(NH_(3))_(6)]^(2+),ICI_(4)^(-), [NiCl_(4)]^(2-),""[AgF_(4)]^(-), SF_(4)

Answer»


SOLUTION :`[PtCl_(4)]^(2-),ICl_(-),[AgF_(4)]^(-)`
Discussion
19.

Among the following, total no. of planar species is : (i) SF_(4) "" (ii) BrF_(3) "" (iii) XeF_(2) "" (iv) IF_(5) (v) SbF_(4)^(-) "" (vi) SF_(5)^(-)"" (vii) SeF_(3)^(+) "" (viii) CH_(3)^(+) (ix) PCl_(4)^(+)

Answer»


ANSWER :3
Discussion
20.

Among the following time correct order of acidity is …………… .

Answer»

`HClO_(2) lt HCLO lt HClO_(3) lt HClO_(4)`
`HClO_(4) lt HClO_(2) lt HClOlt HClO_(3)`
`HClO_(3) lt HClO_(4) lt HClO_(2) lt HClO`
`HClO lt HClO_(2) lt HClO_(3) lt HClO_(4)`

Solution :`HClO lt HClO_(2) lt HClO_(3) lt HClO_(4)`
Discussion
21.

Among the following the weakest one is

Answer»

METALLIC bond
Ionic bond
Van DER WAAL's FORCE
Covalent bond

Solution :Vander waal's FORCES is the weakest force of attraction .
Discussion
22.

Among the following, the weakest conjugate base is

Answer»

`OH^(-)`
`SH^(-)`
`SE H^(-)`
`Te H^(-)`

Answer :D
Discussion
23.

Among the following, the weakest base is

Answer»

`H^(-)`
`OH^(-)`
`Cl^(-)`
`HCO_(3)^(-)`

SOLUTION :It is CONJUGATE base of the STRONG acid.
Discussion
24.

Among the following, the total number of species that contain(s) three-centered-two -electrons bond in their dimeric form is /are BH_(3), Al(CH_(3))_(3),AlCl_(3),BeH_(2),BeCl_(2),I Cl_(3)

Answer»
Discussion
25.

Among the following, the surfactant that will form micelles in aqueous solution at the lowest molar concentration at ambient conditions is

Answer»

`CH_(3)(CH_(2))_(15)N^(+)(CH_(3))_(3)Br^(-)`
`CH_(3)(CH_(2))_(11)OSO_(3)^(-)Na^(+)`
`CH_(3)(CH_(2))_(6)COO^(-)Na^(+)`
`CH_(3)(CH_(2))_(11)N^(+)(CH_(3))_(3)Br^(-)`

SOLUTION :During micelle formation, number of ions decreases as a result of which conductance reduces. The formation of micelles THUS also reduces the osmotic pressure thereby increasing the average MOLAR MASS of the hydrocarbon chain of the surfactant.
Discussion
26.

Among the following, the surfactant that will form micelles inaqueous solution at the lowest molar concentration at ambient condition is

Answer»

`CH_3(CH_2)15N^+(CH_3)_3Br^-`
`CH_3(CH_2)_11N^+(CH_3)_3Br^-`
`CH_3(CH_2)_6COO^(-) NA^(+)`
`CH_3(CH_2)_11OSO3^(-)Na^(+)`

ANSWER :A
Discussion
27.

Among the following, the surfactant that will form micelles in aqueous solution at the lowest molar concentration at amibient condition is :-

Answer»

`CH_(3)(CH_(2))_(15)N^(+)(CH_(3))_(3)Br`
`CH_(3)(CH_(2))_(11)OSO_(3)^(-)NA^(+)`
`CH_(3)(CH_(3))_(6)-COO^(-)Na^(+)`
`CH_(3)(CH_(2))_(11)N^(+)(CH_(3))_(3)Br`

Answer :B
Discussion
28.

Among the following, the strongest reducing agent is:-

Answer»

`Mn^(2+)`
`Cr^(3+)`
`CL^(-)`
`Cr`

Solution :For strongest reducing agent `E_(OP)^(o)` should be MAXIMUM
`_(OPCr//Cr^(+3))^(o)=0.74V`
WHEREAS
`E_(OPMn^(2+)//MnO_(4)^(-))^(o)=-1.5V`
`E_(OPCr^(3+)//Cr_(2)O_(7)^(-2))^(o)=-1.33V""E_(OPCL^(-)//Cl_(2))=-1.36V`
Discussion
29.

Among the following the strongest nucleophile is

Answer»

`C_(2)H_(5)SH`
`CH_(3)COO^(-)`
`CH_(3)NH_(2)`
`NC CH_(2)^(-)`
Discussion
30.

Which of the following polymer has strongest intermolecularforces of attraction ?

Answer»

ELASTOMERS
fibres
THERMOPLASTICS
THERMOSETTING POLYMERS

Solution :Thermosetting polymers have strongest molecular forces.
Discussion
31.

Among the following, the strongest base is

Answer»

`C_(6)H_(5) NH_(2)`
`p-NO_(2)-C_(6)H_(4)NH_(2)`
`m-NO_(2)-C_(6)H_(4)NH_(2)`
`C_(6)H_(5)CH_(2)NH_(2)`.

Solution :AMONG the GIVEN species, benzyl amine is strongest BASE.
Discussion
32.

Among the following , the strongest base is

Answer»

`TB(OH)_(3)`
`LA(OH)_(3)`
`Ce(OH)_(3)`
`Gd(OH)_(3)`

Answer :A::B::C
Discussion
33.

Among the following, the strongest acid is ________

Answer»

`ClCH_(2)COOH`
`Cl_(3)C COOH`
`CH_(3)COOH`
`Cl_(2)CHCOOH`

Answer :B
Discussion
34.

Among the following, the state function(s) is (are)

Answer»

INTERNAL energ
Irreversible EXPANSION work
Reversible expansion
Molar enthalpy

Answer :A::D
Discussion
35.

Among the following, the state function(s) is(are)

Answer»

INTERNAL energy
Irreversible expansion work
Reversible expansion work
Molar enthalpy

Solution :STATE FUNCTION are internal energy and molar enthalpy. Work is PATH function WHETHER it is reversible or irreversible.
Discussion
36.

Among the following, the species with tetrahedral geometry ?

Answer»

`[Pd(CN)_(4)]^(2-)`
`[NI(CN)_(4)]^(2-)`
`[PdCl_(4)]^(2-)`
`[NiCl_(4)]^(2-)`

Solution :
AS `Cl^(-)` is a weak field ligand, no regrouping of electrons occurs. Hence Ni(II) UNDERGOES `sp^(3)` hybridisation, and acquires tetrahedral geometry.
Discussion
37.

Among the following the square planar shape is for:

Answer»

`XeOF_(4)`
`XeF_(4)`
`XeF_(2)`
`XeO_(3)`

ANSWER :B
Discussion
38.

Among the following, the species with one unpaired electron are:

Answer»

`O_2^+`
`NO`
`O_2^-`
`B_2`

ANSWER :A::B::C
Discussion
39.

Among the following, the species having the smallest bond is

Answer»

`NO^(-)`
`NO^(+)`
`O_(2)`
`NO`

SOLUTION :`NO^(-)(16)-B.O=2 O_(2)(16)-B.O.=2`
`NO^(+)(14)-B.O.=3 NO(15)-B.O.=2.5`
Higher the bond ORDER LOWER is the bond LENGTH. Hence NO. will have SMALLEST bond
Discussion
40.

Among the following, the set of parameters that represents, path function is:

Answer»

II, III AND IV
I,II AND III
II AND III
I AND IV

Solution :q & W are PATH functions
Option ( C) is correct.
Discussion
41.

Among the following the reaction that proceeds through an electrophilic substituion is

Answer»




ANSWER :B
Discussion
42.

Among the following the pseudohalide is

Answer»

CN
ICl
`I_3^`
`IF_5`

ANSWER :A
Discussion
43.

Among the following the pKa is minimum for

Answer»




ANSWER :D
Discussion
44.

Among the following the paramagnetic compound is

Answer»

`Na_2O_2`
`O_3`
`N_2O`
`KO_2`

ANSWER :D
Discussion
45.

Among the following the pair in which the two species are not iso - structural is

Answer»

`IO_(3)^(-)` and `XeO_(3)`
`BH_(4)^(-)`and `NH_(4)^(+)`
`PF_(6)^(-)`and`SF_(6)`
`SiF_(4)`and`SF_(4)`

ANSWER :D
Discussion
46.

Among the following the oxidation potential is maximum is case of :

Answer»

SCE
SHE
NCE
DCE

Solution :All other SHOW REDUCTION POTENTIAL.
Discussion
47.

Among the following. The one which reacts most readily with ethanol is

Answer»

p-Nitrobenzyl BROMIDE
p-Chlorobenzyl CHLORIDE
p-Methoxybenzyl bromide
p-Methyl BENZYL bromide.

SOLUTION :NA
Discussion
48.

Among the following, the one which reacts most readily with ethanol is

Answer»

p-nitrobenzyl BROMIDE
p-chlorobenzyl chloride
p-methoxybenzyl bromide
p-methylbenzyl bromide

Solution :Since benzyl carbocation is stabilized by resonance, therefore, reaction occurs by `S_(N)1` mechanism. Further since ELECTRON donating groups increase while electron withdrawing groups decrease the stability of carbocations, therefore, p-methoxybenzyl bromide REACTS most READILY since it gives the most stable carbocation.
Discussion
49.

Among the following the one that gives positiveiodoform test upon reaction with I_(2) and NaOH is

Answer»

`CH_(3)CH_(2)CH(OH)CH_(2)CH_(3)`
`C_(6)H_(5)CH_(2)CH_(2)OH`
`CH_(3)-OVERSET(CH_(3))overset(|)CHCH_(2)OH`
`PhCHOHCH_(3)`

Solution :
Discussion
50.

Among the following the one that gives positive iodoform test upon reaction with I_(2) and NaOH is ?

Answer»

`CH_(3)CH_(2)Ch(OH)CH_(2)CH_(3)`
`C_(6)H_(5)CH_(2)CH_(2)OH`
`CH_(3)-underset(CH_(2)-OH)underset(|)(CH)-CH_(3)`
`PhCHOHCH_(3)`

SOLUTION :For POSITIVE iodoform test, alcohol MOLECULES must have `CH_(3)-underset(OH)underset(|)(CH)-`group
`Ph-underset(OH)underset(|)(CH)-CH_(3)overset(I_(2)+NAOH)rarrCHI_(3)+Ph-COO^(-)`.
Discussion