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 equilibrium reaction the equilibrium whould shift to the right , if the total pressure is increased:

Answer»

`N_2 + 3H_2 ⇌2NH_3`
`H_2 + I_2 ⇌ 2HI`
`H_2 + Cl_2 ⇌2HCl`
`N_2O_4 ⇌2NO_2`

ANSWER :A
Discussion
2.

In which of the following paris, both ions are coloured in aqueous solution?

Answer»

`Ni^(2+),Ti^(4+)`
`Ni^(2+),Ti^(3+)`
`SC^(3+),Ti^(3+)`
`CR^(2+),Zn^(2+)`

Solution :`Ni^(2+)(Z=28)=[AR
Discussion
3.

In which fo the following reaction the product formed by anti markonikoff rule is observed:

Answer»

`ClCH=CH_(2)overset(HCl)to`
`CH_(3)CH=CH_(2)overset(HCl)to`
`CH_(3)OCH=CH_(2)overset(HCl)to`
NONE of these

Answer :B
Discussion
4.

In which of the following pairs the two species have identical bond order?

Answer»

`N_(2)^(-),O_(2)^(2-)`
`N_(2)^(-),O_(2)^(-)`
`N_(2)^(-),O_(2)^(+)`
`O_(2)^(+), N_(2)^(2-)`

SOLUTION :Bond orderof `N_(2)^(-)=` bond ORDER of `O_(2)^(+)=2 1/2`,
Discussion
5.

in which emulsion coloured droplets are obtained when oil soluble dye is added to it?

Answer»

COLD CREAM 
Milk 
HAIR cream 
Cod liver oil 

SOLUTION :Milk
Discussion
6.

In which of the following pairs, tripositive ions of bothwill have same colour ?

Answer»

Pm (61), ER (68)
La (57) , Tb(65)
SM(62) , Dy(66)
Both (a) and (c )

Answer :D
Discussion
7.

In which electrolysis one faraday can produce one mole at cathode or anode ?

Answer»

aq NACL
aq `AgNO_3 `
FUSED NaCl
aq `CuSO_4`

Solution : `1F to (1)/(Z)` mole , `1F to (1)/(1) ` mole ` to (1)/(2) " mole " to (1)/(1) "mole " to (1)/(4) " mole " to (1)/(2)H_2 to (1)/(2) " mole" Cu`
Discussion
8.

In which electrolysis equal volumes of gases are released at anode and cathode during electrolysis

Answer»

AQ NACL
aq `KNO_3`
aq HCOOK
aq `CH_3COOK `

Solution :(a) `aqNaCl overset(ele)to (1)/(2) H_2 + (1)/(2) Cl_2 + NaOH , (B) aq KNO_3 overset(ele)to H_2+ (1)/(2) O_2 HNO_O3 `
(C)` aq HCOOK to 2CO_2 + 2OH+ H_2 + H_2 , (d) aq H_3COOK to C_2H_6 + 2CO_3 + 2KOH + H_2`
Discussion
9.

In which of the following pairs, the two species are not isostructural ?

Answer»

`PCl_(4)^(+) and SiCl_(4)`
`PF_(5) and BrF_(5)`
`AlF_(6)^(3-) and SF_(6)`
`CO_(3)^(2-) and NO_(3)^(-)`

Solution :`PF_(5) (sp^(3)d)` has trigonal bipyramidal GEOMETRY while `BrF_(5) (ds^(3)d^(2))` has square pyramidal or distorted octahedral geometry. All the REMAINING have the same structure : `PCl_(4)^(+), SiCl_(4)` (tetrahedral) `sp^(3) , AlF_(6)^(3-) and SF_(6)` (octahedral, `sp^(3)d^(2)`) and `CO_(3)^(2-) and NO_(3)^(-)` (trigonal planar, `sp^(2)`).
Discussion
10.

In which direction will the following equilibria I and II proceed? I:H_(2)SO_(4)(aq)+NH_(3)(aq)hArrNH_(4)^(+)(aq)+HSO_(4)^(-)(aq) II: HCO_(3)^(-)(aq)+SO_(4)^(-)(aq)hArr HSO_(4)^(-)(aq)+CO_(3)^(2-)(aq)

Answer»

I forward &II backward
I backward & II forward
Both forward
Both backward

Solution :Equilibrium proceeds in the direction FORM strong (Acid/Base) to weak (Acid/Base).

Here acidic STRENGTH is compared among the `2` ACIDS in the reaction & basic strength is compare among `2` bases in that reaction only.
Discussion
11.

In which of the following pairs, the two species are isostructural ?

Answer»

`BrO_(3)^(-) and XeO_(3)`
`SF_(4) and XeF_(4)`
`SO_(3)^(2-) and NO_(3)^(-)`
`BF_(3) and NF_(3)`

Solution :`BrO_(3)^(-) and XeO_(3)` are both pyramidal. All OTHERS have DIFFERENT geometries. For example, `SF_(4)` is trigonal bipyramidal and `XeF_(4)` is square PLANAR , `SO_(3)^(2-)` is pyramidal while `NO_(3)^(-)` is trigonal planar , `BF_(3)` is trigonal planar and `NF_(3)` is pyramidal.
Discussion
12.

In which direction can the reaction, 2Hg+2Ag^+(aq.)

Answer»

SOLUTION :( C ) 3 eq. of Ag and Cu, zero EQUIVALENT of Na and Al will bedeposited.
NOTE electrolysis of `NaCl _(aq)` and AlCl_(aq) does not GIVE Na and Al metal at cathode.
Thus molar ratio is `3/1:3/2` for Ag:Cu
or `3:3/2` or 6:3:0:0 for Ag : CL: Al: Na
Discussion
13.

In which direction can the reaction, 2Hg+2Ag^+(aq.)

Answer»

SOLUTION :(B) `S propAC` , S = k (AC)/
`IMPLIES` K = `S/(AC)` = `(SM)/m^2 (m^3)/"MOLE"`=`S("mole")^-1m^2`
Discussion
14.

In which of the following pairs, the two species are isostructural :

Answer»

`BrO_(3)^(-)`and`XeO_(3)`
`SF_(4)`and`XeF_(4)`
`SO_(3)^(2-)`and`NO_(3)^(-)`
`BF_(3)`and`NF_(3)`

SOLUTION :Both `BrO_(3)^(-)` and `XeO_(3)` involve `sp^(3)` hybridisation of central atom and have one lone pair of electron. These have pyramidal shape.
Discussion
15.

In which of the following pairs, the two species are iso - structural?

Answer»

`SO_(3)^(2-) and NO_(3)^(-)`
`BF_(3) and NF_(3)`
`BrO_(3)^(-) and XeO_(3)`
`SF_(4) and XeF_(4)`.

Solution :Both `BrO_(3)^(-)` and `XeO_(3)` involve `sp^(3)` HYBRIDISATION of the CENTRAL atom and have one LONE pair. Both have pyramidal shape.
Discussion
16.

In which conversion , bond length decreases ?

Answer»

`N_(2) to N_(2)^(+)`
`N_(2) to N_(2)^(-)`
`CO to CO^(+)`
`O_(2) to O_(2)^(-)`

ANSWER :C
Discussion
17.

In which of the following pairs, the size of thefirst species is not more than the second?

Answer»

LI,F
`Fe^(2+),Fe^(3+)`
`NA^(+),F^(-)`
`S,O`

ANSWER :C
Discussion
18.

In which crystal structure, both vacancy and interstitial defects are observed at the same time?

Answer»

AgI
CCl
KCl
NaCl 

ANSWER :A
Discussion
19.

In which of the following pairs, the ionisation energy of the first species is less than of the second

Answer»

<P>`O^(+)` , O
S, P
N, P
`Be^(+)` , Be

Answer :B
Discussion
20.

In which condition the rate of physisorption increases?

Answer»

By DECREASING pressure.
By INCREASING TEMPERATURE. 
By decreasing temperature.
By decreasing VOL. of system.

Solution :By decreasing temperature.
Discussion
21.

In which condition reaction become spontaneous ?

Answer»

VALUE of `E^@` and `DELTAG^@` is negative 
Value of `E^@` and `DeltaG^@` is POSITIVE 
Value of `E^@` is negative and `DeltaG^@` is positive 
Value of `E^@` is positive and `DeltaG^@` is negative 

Answer :D
Discussion
22.

In which of the following pairs, the hybridisation of the central atoms in same ?

Answer»

`CIF_3, CIF_3O`
`CIF_3O, CIF_3O_2`
`(CIF_2O)^(+), (CIF_4O)^(-)`
`(CIF_4O)^(-) (XeOF_4)`

SOLUTION :STERIC NUMBER of `CIF_3 =3+2=5(sp^3d)` Steric number of `CIF_3O =4+1=5(sp^3d)`
Steric number of `CIF_3O_2 =5+0=5(sp^3d)` Steric number of `CIF_2O^(+) =3+1=4(sp^3)`
Steric number of `CIF_4O^(-) =5+1=6(sp^3d^2)`Steric number of `XeOF_4 =5+1=6(sp^3d^2)`
Discussion
23.

In which of the following pairs, the first one is chiral and the second one is achiral?

Answer»

LACTIC ACID, ETHANOL
lactic acid, butan-2-ol
2-Methylbutanal, 3-methylhexane
2, 3-Dimethyl BUTANE, 2,3-Dimethyl pentane

Answer :A
Discussion
24.

In which compound the reacting electrophile will be directed to ortho and para position ?

Answer»




ANSWER :B
Discussion
25.

In which of the following pairs, the first ion has larger magnetic moment than the other ?

Answer»

`FE^(3+), Fe^(2+)`
`ZN^(2+), CU^(+)`
`CR^(2+), Mn^(2+)`
`V^(3+), Cr^(3+)`

Answer :A
Discussion
26.

In which compound does vanadium has an oxidation number of +4 ?

Answer»

`NH_4VO_2`
`VO_2^+`
`VSO_4`
`VOSO_4`

ANSWER :D
Discussion
27.

In which of the following pairs, the first substanceis more covalent than the second ?

Answer»

AGCL, AgI
KCl, LICL
`MgCl_(2), BeCl_(2)`
AgCl,NaCl

Answer :D
Discussion
28.

In which compound, the oxidation state of phosphorus is +4

Answer»

<P>`P_(4)O_(11)`
`P_(4)O_(8)`
`P_(4)O_(6)`
`H_(3)PO_(4)`

SOLUTION :`OVERSET(**)(P)_(4)O_(8)`
4X+(-2x8)=0
4x-16=0
`x=16/4=+4`
Discussion
29.

In which of the following pairs the enthalpy of neutralization is less than or more than the standard value

Answer»

`HNO_(3) and NaOH`
`HCl and NaOH`
`HCN and NaOH`
`H_(2)SO_(4) and NaOH`

Solution :The enthalpy of neutralization of STRONG ACIDS by strong BASES is equal to the standard enthalpy of neutralization i.e., -13.9 kcal/mol. But HCN is a weak acid and NaOH is a strong base so, the enthalpy of neutralization for this pair is less than the standard VALUE, i.e., -12.13 kcal
Discussion
30.

In which compound heat of combustion is highest :

Answer»




Solution :C and D have higher no of C ATOM and C has (e,e) structure in CHAIR conformation which is more STABLE than D.
Discussion
31.

In which of the following pairs, the first compound does not have higher boiling point than the second ?

Answer»

`H_(2)O` and `H_(2)S`
`CH_(4)`and`SiH_(4)`
HF and HCl
HI and HBr

Answer :B
Discussion
32.

In which compound, Cis-Trans nomenclature cannot be used?

Answer»

`CH_(3)-CH=CH-CH_(3)`
`CH_(3)-CH=CH-COOH`

`C_(6)H_(5)-CH=CH-CHO`

ANSWER :C
Discussion
33.

In which compound does oxygen has an oxidation state of +2 :

Answer»

`H_2O_2`
`H_2O`
`OF_2`
CO

Answer :C
Discussion
34.

In which of the following pairs, the constants/quantities are not mathematically related to each other

Answer»

Gibb's free energy an standard CELL potential
Equilibriu constant and standard cell potential
Rate constant and activation energy
Rate constant and standard cell potential

Solution :(a). `DELTAG^(o)=-nFE_(cell)^(o)`
(b) `E_(cell)^(o)=(2.303RT)/(NF)logK_(c)`
(c) `K=Ae^(-E_(a//RT))`
Discussion
35.

In which of the following pairs, the atomic size is almost the same ?

Answer»

LA -CE
Nb - TA
Zr - Hf
Nb - Zr.

Answer :B
Discussion
36.

In which classes, the polymers classified on the basis of molecular forces ?

Answer»

Solution :On the basis of intermolecular forces OPERATING between the different POLYMER chains, polymers are classified as:
(i) ELASTOMERS (ii) Fibres
(iii) Thermoplastics (iv) Thermosetting PLASTICS.
Discussion
37.

In which of the following pairs of ions, the higher oxidation state in aqueous solution is more stable than the other? I. TI^(+), TI^(3+)II. Cu^(+),Cu^(2+) III. Cr^(2+),Cr^(3+)IV. V^(2+),VO^(2+)(V^(4+))

Answer»

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

Answer :D
Discussion
38.

In which of the following pairs of molecules / ions, both the species are not likely to exist ?

Answer»

`H_(2)^(+), He_(2)^(2-)`
`H_(2)^(-), He_(2)^(2-)`
`H_(2)^(2+), He_(2)`
`H_(2)^(-), He_(2)^(2+)`

SOLUTION :BOND order of `H_(2)^(2+)`and `He_(2)`are zero and THEREFORE, these do not exist.
Discussion
39.

In which classes, the polymers are classified on the basis of molecular forces ?

Answer»

SOLUTION :On the basis of intermolecular forces of attraction operating between the different POLYMER chains , polymers are classified into the FOLLOWING classes :
1.Elastomers 2. FIBRES 3. Thermoplastics and 4. Thermosetting plastics.
Discussion
40.

In which cell, the free energy of a chemical reaction is directly converted into elecricity ?

Answer»

Lechanche CELL
FUEL cell
Lead storage BATTERY
LITHIUM ion battery

ANSWER :B
Discussion
41.

In which of the following pairs of carbocations, the first carbocation is more stable than the second ? (i) CH_(2) = CH - CH_(2) and CH_(2) = CH - CH_(2) - overset(+)(CH_(2)) (ii) CH_(3) - NH - overset(+)(CH_(2)) and overset(+)(CH_(2)) - OH (iii) CH_(3) - O - CH_(2) - overset(+)CH_(2) and CH_(3) - O - overset(+)(CH_(2)) (IV) CH_(3) overset(+)(CH) - CH_(2) CH_(2) CH_(3) and CH_(3) CH_(2) - overset(+)(CH) - CH_(2) CH_(3)

Answer»

(i),(II) and (iii)
(i) , (ii) and (iv)
(ii) and (iii)
(iii) and (iv)

Solution :(i)First carbocation `(CH_(2) = overset(+)(CHCH_(2)) ) ` is stabilized by resonance but the second `(CH_(2) = "CHCH"_(2) CH_(2)^(+))` is not.
THEREFORE, first carbocation is more stable than the second

In both the cases, +ve charge is dispersed due to resonance but in the second carbocation +ve charge is located on a more electronegative O-atom. Therefore, first carbocation is more stable than second.

(iii) Second carbocation
is stabilized by resonance but first `(CH_(3) - O - CH_(2) - overset(+)(CH_(2)))` is not. Therefore, carbocation second is more stable than the frst. (iv) First carbocation `(CH_(3) overset(+)("CHCH"_(2)) CH_(2) CH_(3))`has FIVE a-hydrogen atoms and hence five hyperconjugation structures are possible while the second carbocation `(CH_(3) CH_(2) overset(+)("CHCH"_(2)) CH_(3))` has only four `alpha`-hydrogen atoms and hence has four hyperconjugative structures. Therefore, first carbocation is little more stable than the second. Thus, the correct answer is option (B).
Discussion
42.

In which cell the free energy of a chemical reaction is directly convertd into electricity

Answer»

Leclanche CELL
Concentration cell
FUEL cell
Lead storage battery

Solution :Fuel cell CONVERTS the CHEMICAL energy into electrical energy.
Discussion
43.

In which of the following pairs of complexes the central metal/ions do have same effective atomic number?

Answer»

`[CR(CO)_(6)]" and "[FE(CO)_(5)]`
`[Co(NH_(3))_(6)]^(2+)" and "[Ni(NH_(3))_(6)]^(2+)`
`[Cu(CN_(4))]^(3-)" and "[Ni(CO)_(4)]`
`[V(CO)_(6)]^(-)" and "[Co(NO_(2))_(6)]^(3-)`

Answer :A::C::D
Discussion
44.

In which cases products formed are not according to reaction?

Answer»



`CH_(2)=CH-CHO+LlAlH_(4)rarrCH_(2)-CHCH_(2)OH`

Answer :A::C::D
Discussion
45.

In which of the following pairs is the probability of finding the electron in only xy - planeis zero forboth orbatals ?

Answer»

`3d_(xy),4d_(x^(2)y^(2))`
`2P_(Z),3d_(z^(2)`
`4d_(zx),3P_(z)`
None of these

Answer :4
Discussion
46.

In which cell, construction like galvanic cell can be observed ? Explain. What is fuel cell ? Write a note on it.

Answer»

Solution :* Galvanic cell directly converts chemical energy into electricity and is highly EFFICIENT. Fuel cell has galvanic cell like construction.
* Cell in which chemical energy is directly converted into electrical energy and having galvanic cell like arrangement is called as fuel cell.
* Construction : in fuel cells reactants are FED continuously to the electrodes and products are removed continuously from the ELECTROLYTE compartment. galvanic cells are DESIGNED to convert the energy of combustion of fuels like hydrogen, METHANE, methanol, etc. directly into electrical energy.
* Advantages of fuel cell :
(i) By this cell, there is no pollution of air and noise.
(ii) Fuel cell has high efficiency of 70% or more than that while thermal power station has low efficiency of 40% and less.
(iii) Various fuels can be used in fuel cells.
Discussion
47.

In which of the followingpair's first compound is having higher resonance energy?

Answer»




All of these

Answer :B
Discussion
48.

In which of the following pairs do 1 g of each have an equal number of molecules?

Answer»

`N_(2)O` and CO
`N_(2)` and `C_(3)O_(2)`
`N_(2)` and CO
`N_(2)O` and `CO_(2)`

Answer :C::D
Discussion
49.

In which of the following pairs both the species are not isostructural ?

Answer»

Diamond, silicon carbide
`NH_(3), PH_(3)`
`XeF_(4), XeO_(4)`
`SiCl_(4), PCl_(4)^(+)`

SOLUTION :`XeF_(4)` (square planar) and `XeO_(4)` (TETRAHEDRAL) are not isostructural.
Discussion
50.

In which cases, free radicals can be formed by homoytic fission?

Answer»

`H_(3)C-OVERSET(O)overset(||)C-CH_(3)overset(hv)RARR`
`R-N=N-Roverset(hv)rarr`

`CH_(3)-O-O-CH_(3)overset(hv)rarr`

SOLUTION :`H_(3)C-overset(O)overset(||)C-CH_(3) overset(hv)rarr2CH_(3)+overset(Ɵ)C-=overset(o+)O:`
`R-N=N-Roverset(hv)rarr2R^(.)+N-=N`
`Ph-CH_(2)-overset(O)overset(||)C-overset(.)Ooverset(hv)rarrPh-overset(.)CH_(2)+overset(O)overset(||)C=O`
`CH_(3)-O-O-CH_(3)overset(hv)rarr2CH_(3)-O`
Discussion