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.

In which of the following species presence of lone pair does not affect idealized bond angle ? (I) PF_(3) (II) BrF_(3) (III) IF_(5) (IV) I Cl_(4)^(-) (V) XeF_(2)

Answer»

I,II,III
IV,V
II, V
NONE of these

Answer :B
Discussion
2.

In which of the following compounds central atom has same number of lone pairs of electrons? (a) XeF_2(b) XeF_4(c) XeO_3 (d) XeOF_4

Answer»

(a)&(B)
(a),(C)&(d)
(c)&(d)
(b)&(c)

ANSWER :C
Discussion
3.

In which of the following species the central carbon atom is negatively charged ?

Answer»

CARBONIUM ion
Carbanion
Carbocation
Free radicals

Answer :B
Discussion
4.

In which of the following compounds crystal have axial distance relation is different from other ?

Answer»

`KNO_3`
HGS
`K_2Cr_2O_2`
`S_8(m)`

ANSWER :B
Discussion
5.

In which of the following species only half filled and full filled orbitals of central atom participate in hybridisation

Answer»

`SO_(3)`
`NH_(4)^(+)`
`BF_(4)^(-)`
`l_(3)^(-)`

Answer :B
Discussion
6.

In which of the following compounds carbon exhibits valency of 4 but oxidation state - 2

Answer»

`HCHO`
`CH_3Cl`
`CH_2Cl_2`
`CHCl_3`

Solution :`CH_3Cl to X + 3 - 1 = 0, x+ 2 = 0 , Oxidation state = -2 , But valenecy is 4
Discussion
7.

In which of the following compounds C-X bond length is shortest

Answer»




SOLUTION : DUE to resonance CAUSES double bond character to C-X bond in chlorobenzene
Discussion
8.

In which of the following species maximum atom can lie in same plane ?

Answer»

`XeF_(2)O_(2)`
`PCl_(5)`
`AsH_(4)^(+)`
`XeF_(4)`

SOLUTION :
Discussion
9.

In which of the following compounds B-O bond length is shortest?

Answer»

`H_(3)BO_(3)`
`B(OH)_(4)
Both have same
None

Solution :`N//A`
Discussion
10.

In which of the following species is the underlined carbon having sp^(3)hybridisation ?

Answer»

`CH_(3)-ul(C )OOH`
`CH_(3)ul(C )H_(2)OH`
`CH_(3)-ul(C )O-CH_(3)`
`CH_(2)= ul(C )H-CH_(3)`

Answer :B
Discussion
11.

In which of the following species central atom is NOT surrounded by exactly 8 valence electrons ?

Answer»

`BF_(4)^(-)`
`NCl_(3)`
`PCl_(4)^(+)`
`SF_(4)`

SOLUTION :
molecule central S-atom is surrounded by 10 valence electrons and it is hypervalent COMPOUND.
Discussion
12.

In which of the following compounds B atoms are in sp^(2) and sp^(3) hybridisation states both?

Answer»

BORAX
Diborane
Borazole
All of these

Answer :A
Discussion
13.

In which of the following species d-orbitals having xz and yz two nodel planes involved in hyridisation of central atom?

Answer»

`IO_(2)F_(2)^(ө)`
`SF_(6)`
`IF_(7)`
None

Solution :`N//A`
Discussion
14.

In which of the following compounds , back bonding is possible

Answer»

`PF_(3)`
`PH_(3)`
`NH_(3)`
`NF_(3)`

ANSWER :A
Discussion
15.

In which of the following species, d-obitals having xz an yz two nodal planes involved in hybridization of central atoms?

Answer»

`IO_(2)F_(2)^(-)`
`ClF_(4)^(-)`
`IF_(7)`
NONE of these

Solution :`IO_(2)F_(2)^(-): Hyb. sp^(3)d[equivsp_(x)d_(y)d_(z)d_(x^(2)]`
`ClF_(4)^(-): Hyb. sp^(3)d^(2)[equivsp_(x)d_(y)d_(z)d_(x^(2)-y^(2))d_(x^(2)]`
`IF_(7): Hyb. sp^(3)d^(3))[equivsp_(x)d_(y)d_(z)d_(x^(2)-y^(2))d_(xy)d_(x^(2)]`
`d_(xy)` : orbitals has two nodal planes xz and zy
Discussion
16.

In which of the following compounds, all Glucose units are not joined by C_(1)- O-C_(4) linkage ?

Answer»

Maltose
AMYLOPECTIN
GALACTOSE
LACTOSE

SOLUTION :Amylopectin
Discussion
17.

In which of the following species, all the three types of hybrid carbons are present ?

Answer»

`CH_(2)=C=CH_(2)`
`CH_(3)-CH=CH-CH_(2)^(+)`
`CH_(3)-C-=C-CH_(2)^(+)`
`CJH_(3)-CH=CH-CH_(2)^(-)`

ANSWER :C
Discussion
18.

In which of the following compounds, all bond lengths are not equal ?

Answer»

`SF_(4)`
`BF_(3)`
`XeF_(4)`
`[BR_(4)]^(-)`

SOLUTION :`SF_(4)` is sea-saw in SHAPE.
Discussion
19.

In which of the following compound the bonds have the largest percentage of ionic character ?

Answer»

`H_2O`
HF
IBr
`N_2O_4`

ANSWER :B
Discussion
20.

In which of the following solvents will AgBr have the highest solubility

Answer»

`10^(-3)` M NaBr
`10^(-3) M NH_(4)OH`
PURE water
`10^(-3)` M HBr

Solution :AgBr are not DISSOLVED in NaBr and HBr due to COMMON ion effect. And pure water is a neutral solvent. They do not have ions.
Discussion
21.

In which of the following compound sulphur atom has sp^(3) hybridisation but bent shape ?

Answer»

`H_(2)SO_(4)`
`S_(8)`
`SO_(2)`
`H_(2)S_(2)O_(6)`

Solution :
Discussion
22.

In which of the following solvents will AgBr has highest solubility ?

Answer»

`10^(-3)` M NABR
`10^(-3)M NH_(4)OH`
PURE water
`10^(-3)` M HBr.

Answer :B
Discussion
23.

In which of the following compound, ℓp. doesn't participate in resonance ?

Answer»

a and B
b and c
c and d
a and d

Answer :B
Discussion
24.

In which of the following solutions, the solubility of AgCN will be greater than that in pure water? (Given : K_(sp)(AgCN)4xx10^(-16),K_(a)(HCN)=5xx10^(-10))

Answer»

`0.01MAgNO_(3)` SOLUTION
A BUFFER solution of pH=12
0.2M `NH_(3)` solution
A buffer solution of pH=5

Answer :C,d
Discussion
25.

In which of the following compound O^18 exchange can be observed on keeping it in H_(2)O^(18)

Answer»




SOLUTION :
In WATER , CARBONYL compounds form HYDRATES
Discussion
26.

In which of the following solution, solubility of AgCl will be maximum?

Answer»

0.1 M `AgNO_(3)`
Water
0.1 M `-NH_(3)(AQ)`
0.1 M NaCl

Answer :C
Discussion
27.

In which of the following compound antimarkownikoff's rule is not possible

Answer»

`CH_(2)-CH-CH_(3)`
`CH_(3)-CH_(2)-CH=CH_(2)`
`(CH_(3))_(2)C=CH_(2)`
`CH_(3)-CH=CH-CH_(3)`

ANSWER :D
Discussion
28.

In which of the following solutions, the solubility of solute decreases on heating the solution ?

Answer»

Aqueous SOLUTION of ETHYLENE glycol
Chlorine water
Aqueous solution of sugar
Zn - Hg AMALGAM

ANSWER :B
Discussion
29.

In which of the following compound, all the monosaccharide units are not joined by C_(1)-O-C_(4) chain.

Answer»

MALTOSE
LACTOSE
CELLULOSE
AMYLOPECTIN

SOLUTION :Amylopectin
Discussion
30.

In which of the following solid substance dispersion forces exist ?

Answer»

`SiO_2`
`H_2O`
`CO_2`
`SO_2`

ANSWER :C
Discussion
31.

In which of the following solids, constituent particles are atoms ?

Answer»

`SiO_2 `
SOLID `SO_2` 
`MGO` 
`KCL`

ANSWER :A
Discussion
32.

In which of the following compound all the bond angles are equal :-

Answer»

`SF_(4)`
`C Cl_(4)`
`CHCl_(3)`
`XeF_(6)`

Solution :`SF_(4) to `see saw SHAPE
`C Cl_(4)`tetrahedral, no lp at CA & all TERMINAL ATOM are same, so all bond angle are same
`CHCl_(3)` , HYB. `sp^(3)` but all terminal atom are not same
`XeF_(6)` hyb `sp^(3)d^(3)`(all bond angles are not same)
Discussion
33.

In which of the following smelting is carried out ?

Answer»

Open hearth FURNACE
Bessemer converter
BLAST furnace
All of these

Answer :C
Discussion
34.

In which of the following compound all the monosaccharide units are NOT joined by C-1-O-C-4 chain?

Answer»

Maltose
lactose
Cellulose
Amylopectin

Answer :D
Discussion
35.

In which of the following sets of molecule is the order of increasing boiling points not correct ?

Answer»

1. HBR, HCl, HF
2. `H_(2)S, H_(2)Se, H_(2)O`
3. `CH_(4), C_(2)H_(6), C_(3)H_(8)`
4. `CH_(4), SiH_(4), GeH_(4)`

Answer :A
Discussion
36.

In which of the following compounds, oxygen exhibits +2 oxidation state ?

Answer»

`H_(2)O`
`H_(2)O_(2)`
`OF_(2)`
`H_(2)SO_(4)`

ANSWER :C
Discussion
37.

In which of the following silicates, only two corners per tetrahedron are shared ? I. Pyrosilicate II. Cyclic silicate III Double chain silicate IV Single chain silicate V 3D Silicate

Answer»

(i),(II)and(V)
(IV) and (VI) only
(i) and (vi) only
(ii) and (vi) only

Solution :
Discussion
38.

In which of the following complex(s) spin only magnetic moment is independent, from the nature of ligand. (L=monodentate ligand) :

Answer»

`[OVERSET(II)NiL_(4)]`
`[overset(II)NiL_(6)]`
`[overset(III)FeL_(6)]`
`[overset(III)CrL_(6)]`

Solution :`Ni^(2+)(d^(8))`

CN=6 Only `sp^(3)d^(2)`
`FE^(3+)(d^(6))C.N.=6` both `sp^(3)d^(2)` and `d^(2)sp^(3)` POSSIBLE
`Cr^(3+)(d^(3))` only `d^(2)sp^(3)` (C.N.=6)
Discussion
39.

In which of the following sets, all the given species are isostructural ?

Answer»

`CO_(2),NO_(2),ClO_(2), SiO_(2)`
`PCl_(3),Al,Cl_(3),BCl_(3),SbCl_(3)`
`BF_(3),NF_(3),PF_(3),AlF_(3)`
`BF_(4)^(-),C Cl_(4),NH_(4)^(+),PCl_(4)^(+)`

Solution :All have tetrahedral structure.
Discussion
40.

In which of the following set do all the three compounds have bonds that are mainly ionic:-

Answer»

`NACL, NCl_(3), C Cl_(4)`
`CsBr, BaBr_(2), SrO`
`CsF, BF_(3), NH_(3)`
`Al_(2)O_(3), CaO, SO_(2)`

Solution :IONIC bond NaCl, CsBr, CsF, `BaBr_(2)`, SrO, CaO
Discussion
41.

In which of the following salt hydrolysis takes place

Answer»

KCl
`NaNO_(3)`
`CH_(3)COOK`
`K_(2)SO_(4)`

Solution :Because it is a saltof weak acid and STRONG base.
Discussion
42.

In which of the following complexes the nickel metal is in highest oxidation state?

Answer»

`NI(CO)_(4)`
`K_(2)NiF_(6)`
`[Ni(NH_(3))_(6)](BF_(4))_(2)`
`K_(4)[Ni(CN)_(6)]`

SOLUTION :`K_(2)[overset(+4)NiF_(6)]`
Discussion
43.

In which of the following S has highest oxidation state?

Answer»

`Na_(2)S_(4)O_(6)`
`S_(2)Cl_(2)`
`S_(8)`
`H_(2)SO_(4)`

Solution :`a(+2.5),b(+1),c(0),d(+7)`
Discussion
44.

In which of the following roasting is carried out?

Answer»

BESSEMER CONVERTER
REVERBERATORY FURNACE
Muffle furnace
Oven

Answer :B
Discussion
45.

In which of the following ring expansion/ring contraction takes place when protic acid is added to the compound ?

Answer»




ANSWER :A,B,C,D
Discussion
46.

In which of the following regions hydrogen and helium are found?

Answer»

Stratosphere
Mesosphere
EXOSPHERE
Troposphere

Solution :`H_(2)`, He and ionic oxygen are PRESENT in exosphere
Discussion
47.

In which of the following reactions ZSM-5 is useful ?

Answer»

TOLUENE from BENZENE 
Benzene from toluene 
Petrol from ALCOHOL
Toluene from HEPTANE 

Solution :Petrol from alcohol
Discussion
48.

In whichof the following reactions would the yield of the products be increased by the application of high pressure?

Answer»

`2SO_(2)+O_(2)iff2SO_(3)`
`N_(2)+3H_(2)iff2NH_(3)`
`PCl_(5)iffPCl_(3)+Cl_(2)`
`H_(2)+I_(2)iff2HI`

Solution :SINCE in option (a) and (b) VOLUME is decreasing, thus high pressure will favour the forward reaction.
Discussion
49.

In which of the following reactions, the value of K_(p) will be equal to K_(c)?

Answer»

`N_(2(G))+O_(2(g))iff2NO_((g))` <BR>`PCl_(5(g))iffPCl_(3(g))+Cl_(2(g))`
`H_(2(g))+Br_(2(g))iff2HBr_((g))`
`2SO_(2(g))+O_(2(g))iff2SO_(3(g))`

Solution :`K_(p)=K_(C)(RT)^(Deltan)`
When`Deltan=0,K_(p)=K_(c)`
Discussion
50.

In which of the following complexes, the metal ion is in zero oxidation state ?

Answer»

`Mn(CO)_4`
`Zn_2 [FE(CN)_6]`
`[Cu(NH_3)_4]Cl_2`
`[Ag(NH_3)_2]Cl`

ANSWER :A
Discussion