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 pairs both the solids belong to same type ?

Answer»

SOLID `CO_(2)`, ZnS
`CaF_(2), CA`
Graphite, ice
SIC,AIN

Solution :SiC and AIN are covalent SOLIDS.
Discussion
2.

In which case will SE not be in m- position?

Answer»




Solution :a. `(-OVERSET(O)overset(||)(C)-)` group, b. (-overset(o+)(N) Me_(3))` group
c. It is weakly deactivating BTU `o, p-` director.
d. `(-CF_(3))` group, `(a),(b)` and `(d) are `m-` director.
Discussion
3.

In which of the following pairs, both the minerals are oxides ?

Answer»

SYLVINE, salpetreb
Galena, litharge
Siderite, CORUNDUM
Cuprite, TINSTONE Extract

Solution :Cuprite `-Cu_(2)O` (Ruby copper), tinsotone `(SnO_(2))`
Discussion
4.

In which case, the order of acidic strength is not correct?

Answer»

`HI gt HBR gt HCl`
`HIO_(4) gt HBrO_(4) gt HClO_(4)`
`HClO_(4) gt HClO_(3) gt HClO_(2)`
`HF gt H_(2)O gt NH_(3)`

Solution :Greater the ELECTRONEGATIVITY of central atom, more is the acidic strength.
`HClO_(4)gt HBrO_(4)gt HIO_(4)`
Discussion
5.

IN which of the following pairs, both the ions are coloured in aqueous solutions ?

Answer»

`Sc^(3+), Ti`
`Sc^(3+), CO^(2+)`
`Ni^(2+), Cu^(+)`
`Ni^(2+), Ti^(3+)`

Solution :Both `Ni^(2+)` and `Ti^(3+)` contain UNPAIRED electrons.
Discussion
6.

In which case the product is neither a cyclic ether nor open chain symmetrical ether-

Answer»

`CH_(3)-CH=CH-CH_(3)overset(C_(6)H_(5)CO_(3)H)to`
`CH_(3)CH_(2)ON a+C_(2)H_(5)Brto`
`KCN+(CH_(3))_(3)Cbrto`
`C_(2)H_(5)OH("Excess")+H_(2)SO_(4)overset(140^(@))to`

Solution :REACTION of R-X with KCN does not produce ether.
Discussion
7.

In which of thefollowingpairs both thehydrides are not of the sametype

Answer»

`"PH"_(3),"SIH"_(4)`
`"LiH,CaH"_(2)`
`"ZrH"_(2)`,`"YH"_(2)`
`"ASH"_(3),"ScH"_(2)`

Answer :C
Discussion
8.

In which case second has lower boiling point than first ?

Answer»




SOLUTION :
Discussion
9.

In which of the following pairs both the complexes show optical isomerism?

Answer»

`Cis-[CrCl_(2)(OX)_(2)]^(2-),"trans"-[CrCl_(2)(OX)_(2)]^(3-)`
`[Fe(NH_(3))_(2)(CN)_(4)]^(-)[Fe(EN)_(3)]^(3+)`
`Cis-[Pt(en)_(2)Cl_(2)]^(2+),[Co(en)_(3)]^(3+)`
`Cis-[Co(NH_(3))_(4)(NO_(2))_(2)]^(+),cis(Cr(GLY)_(3)]`

SOLUTION :
Discussion
10.

In Which case (s), there is change in oxidation number ?

Answer»

AQUEOUS solution of `CrO_(4)^(2-)` is acidified
`SO_(2)` gas is passed through acidified `Cr_(2)O_(7)^(2-)` solution
`Cr_(2)O_(7)^(2-)` solution is MADE alkaline
`CrO_(2)Cl_(2)` is is dissolved in NaOH.

Solution :(a) `2overset(+6)(CR)O_(4)^(2-)+2H^(+)rarroverset(+6)Cr_(2)O_(7)^(2-)+H_(2)O " "("no change")`
`overset(+6)Cr_(2)O_(4)^(2-)+3overset(+4)SO_(2)+2H^(+)rarr2overset(+3)Cr^(3+)+3overset(+6)SO_(4)^(2-)+H_(2)O" "("change")`
`overset(+6)Cr_(2)O_(7)^(2-)+2OH^(-)rarr2overset(+6)CrO_(4)^(2-)+H_(2)O" "("no change")`
`overset(+6)CrO_(2)Cl_(2)+2NaOHrarrNaoverset(+6)CrO_(4)+2HCl" "("no change")`.
Discussion
11.

In which of the following pairs both the complexes show optical isomerism -

Answer»

`cis - [CR(C_(2)O_(4))_(2)Cl_(2)]^(3-) , cis - [CO(NH_(3))_(4)Cl_(2)]`<BR>`[Co(en)_(3)]Cl_(3), cis-[Co(en)_(2)Cl_(2)]CL`
`[PtCl" (dien)"]Cl, [NiCl_(2)Br_(2)]^(2-)`
`[Co(NO_(3))_(3)(NH_(3))_(3)], cis - [Pt (en)_(2)Cl_(2)]`

Answer :B
Discussion
12.

In which case the carbon-carbon bond length is same ?

Answer»

2-butene
benzene
1-butene
1-propyne

Answer :B
Discussion
13.

In which of the following pairs both the complexes show optical isomerism ?

Answer»

CIS-`[Cr(C_(2)O_(4))_(2)Cl_(2)]^(3-)`, TRANS-`[Co(NH_(3)_(4)Cl_(2)]`<BR>`[Co(en)_(3)Cl_(3)`, cis-`[Co(en)_(2)Cl_(2)]Cl`
`[PtCl(dien)Cl,[NiCl_(2)Br_(2)]^(2-)`
`[Co(NO_(3))_(3)(NH_(3))_(3)]`, cis-`[Pt(en)_(2)Cl_(2)]`

Answer :B
Discussion
14.

In which case reaction is spontaneous

Answer»

`DeltaH-ve, DeltaS+ve`
`DeltaH+ve, DeltaS-ve`
Both (a) and (B)
NONE of these

Answer :A
Discussion
15.

In which of the following pairs both the complexes do not show optical isomerism ?

Answer»

`cis-[Cr(en)_(2)Cl_(2)]" and "cis-[CO(NH_(3))_(4)Cl_(2)]`
`[Co(gly)_(3)]" and "cis-[CoCl_(2)(en)_(2)]`
`[PT(en)Cl_(2)]" and "fac-[Ni(NH_(3))_(3)Cl_(3)]`
`MER-[Co(NO_(3))_(3)(NH_(3))_(3)]" and "[PtCl_(2)(en)]`

Solution :`[Co(NH_(3))_(4)Cl_(2)]` does not show O.I.
`[Pt("en")Cl_(2)]` does not show O.I. and G.I.
Discussion
16.

In which of the following pairs at least one of the compounds give positive Tollens test?

Answer»

GLUCOSE and sucrose
Glucose and FRUCTOSE
Fructose and sucrose
MALTOSE and sucrose

Solution :Glucose, Fructose, Maltose are REDUCING SUGARS.
Discussion
17.

In which case racemic mixture is obtained on mixing its mirror images in 1:1 molar ratio ?

Answer»

`[Cr(en)_(3)]^(3+)`
`[Ni(DMG)_(2)]`
`CIS-[Cu(gly)_(2)]`
In all of these

Answer :A
Discussion
18.

In which of the following pairs both are nucleophiles ?

Answer»

`BF_(3),AlCl_(3)`
`NO_(2)^(+),Cl^(-)`
`CN^(-),NH_(3)`
`Br^(+),BCl_(3)`

Answer :B::C
Discussion
19.

In which case racemic mixture is obtained on mixing its mirror images (d & l form) is 1:1 molar ratio:

Answer»

trans-`[Co(GLY)_(3)]`
`[Ni(DMG)_(2)]`
cis-`[CU(gly)_(2)]`
`[Zn(en)(gly)]^(+)`

Solution :Trans `[Co(gly)_(3)]` is optically active COMPLEX, hence equimolar mixture of .d. and .l. FORM on mixing gives RACEMIC mixture.
Discussion
20.

In which of the following pairs are the ions isoelectronic ?

Answer»

`Mg^(2+),Ar`
`NA^(+),O^(2-)`
`AI^(3+),CI^(-)`
`K^(+),Ne`

SOLUTION :ISOELECTRONIC refers to two atoms ions molecules that have the same electronicstructure and the same number of valece electrons isoelectronic ions are ions that have the same number of ELCTRONS there are many ions that are isoelectronic examples of isoelectronic ions and ELEMENTS he `Li^(+) He Be^(+) Ar,S^(2-), Na^(+),Mg^(2+)`
Discussion
21.

In which of the following pair of metals, both are commercially extracted from their respective ores by carbon reduction method ?

Answer»

ZN, Cu
Fe, Cu
Sn, Zn
Al, Ag

Answer :C
Discussion
22.

In which of the following pair, both the species are isoelectronic but the first one is large in size than the second?

Answer»

<P>`S^(2-),O^(2-)`
`CL^(2-),S^(2-)`
`F^(-),Na^(+)`
`N^(3-),P^(3-)`

ANSWER :C
Discussion
23.

In which case rate of Hoffmann degradation will be maximum

Answer»




ANSWER :B
Discussion
24.

In which of the following pair both the crystals are not of the same type ?

Answer»

MG and AR 
NaCl and BAO 
SiC and DIAMOND 
Ice and SOLID `SO_2`

Answer :A
Discussion
25.

In which case R - COOH is not product?

Answer»

`R - CN + RMGX to`
`R - CN OVERSET(H_(3)O^(+)) to `
`R- MgC overset(CO_(2)) to `
`RCOR overset("oxidation ") to `

Answer :A
Discussion
26.

In which of the following ozone acts as reducing agent?

Answer»

`BaO_(2)+O_(3)rarrBaO+2O_(2)`
`2HCl+O_(3)rarrCl_(2)+H_(2)O+O_(2)`
`PbS+4O_(3)rarrPbSO_(4)+4O_(2)`
`2KI+O_(3)+H_(2)Orarr2KOH+I_(2)+O_(2)`

Answer :A
Discussion
27.

In which of the following ozone is completely consumed?

Answer»

KI is oxidised to `I_(2)` by ozone
HCl is oxidised to `Cl_(2)` by ozone
`SO_(2)` is oxidised to `SO_(3)` by ozone
PbS is oxidised to `PbSO_(4)` by ozone

Answer :D
Discussion
28.

In which case of mixing of a strong acid and a base, each being of 1 N concentration, the increase in temperature is the highest ?

Answer»

20 mL ACID and 30 mL alkali
10 mL acid and 40 mL alkali
25 mL acid and 25 mL alkali
35 mL acid and 15 mL alkali

Answer :C
Discussion
29.

In which of the following ozone acts as reducing agent ?

Answer»

`BaO_2 + O_3 to BAO + 2O_2`
`2HCL + O_3 to Cl_2 + H_2O + O_2`
`PbS + 4O_3 to PbSO_4 + 4O_2`
`2KI + O_3 + H_2O to 2KOH + I_2 + O_2`

SOLUTION :`BaO_2 + O_3 to BaO + 2O_2.BaO_2` REDUCE to BaO.
Discussion
30.

In which of the following oxyacid halogen atom has + 3 oxidation state

Answer»


ANSWER :B
Discussion
31.

In which case of mixing of a strong acid and a strong base each of 1 M concentration. Temperature increase is the highest ?

Answer»

15 ml acid and 40 ml alkali
10 ml acid and 25 ml alkali
20 ml acid and 20 ml alkali
40 ml acid and 20 ml alkali

Answer :C
Discussion
32.

In which of the following oxidation number of chlorine is +5 is :

Answer»

HCIO
`HCIO_2`
`HCIO_3`
`HCIO_4`

ANSWER :C
Discussion
33.

In which case methyl-t-butyl ether is formed

Answer»

`(CH_(2)H_(5))_(3)CONa+CH_(3)Cl`
`(CH_(3))_(3)CONa+CH_(3)Cl`
`(CH_(3))_(3)CONa+C_(2)H_(5)Cl`
`(C_(2)H_(5))_(3)CONa + C_(2)H_(5)Cl`

Solution :`UNDERSET(2,2-"dimethylsodium ethoxide")(CH_(3)-underset(CH_(3))underset(|)OVERSET(CH_(3))overset(|)C-O-Na+Cl-CH_(3)to)underset("Methyl-t butyl ether")(CH_(3)-underset(CH_(3))underset(|)overset(CH_(3))overset(|)C-O-CH_(3)+NaCl)`
Discussion
34.

In which of the following ores at least metal is in +3 oxidation state and crystal system is orthorhombic

Answer»

Haematite
Copper pyrite
Diaspore
Aragonite

Solution :Diaspire is an ALUMINIUM oxide HYDROXIDE mineral crystallizing in the orthorombic SYSTEM.
Discussion
35.

In which of the following orders base, phosphate and sugar are arranged in the nucleotide of DNA ?

Answer»

Base-Phosphate-sugar
Base-Sugar-Phosphate
Phosphate-Base-Sugar
Sugar-Base-Phosphate

Answer :A
Discussion
36.

In whichcase Methyl-butyl ether is formed ?

Answer»

`(C_2H_5)_3CONa+CH_3Cl `
`(CH_3)_3CONa +CH_3Cl `
`(CH_3)_3CONa+C_2H_5Cl `
`(CH_3)_3CONa + CH_2Cl_2`

ANSWER :B
Discussion
37.

In which of the following options all species contain X–O–X bonds in structure (X = central atom)

Answer»

`H_(2)S_(2) O_(5), S_(3), O_(9), S_(2)O_(6)^(-2)`
`P_(4)O_(10), P_(4)O_(6), H_(3)P_(3)O_(9)`
`N_(2)O_(5), N_(2)O, N_(2)O_(4)`
`H_(4)P_(2)O_(7), H_(4)P_(2)O_(6), H_(4)P_(2)O_(5)`

Answer :B
Discussion
38.

In which case methyl t-butyl ether is formed ?

Answer»

`(C_3H_5)_3CONa+CH_3Cl`
`(CH_3)_3CONa+CH_3Cl`
`CH_3ONa+(CH_3)_3C CL`
`(CH_3)_3CONa+C_2H_5Cl`

ANSWER :B
Discussion
39.

In which case is a reaction possible at any temperature ?

Answer»

`DELTAHLT0, DeltaSgt0`
`DeltaHlt0,DeltaSlt0`
`DELTAHGT0,DeltaSgt0`
in NONE of the cases

Answer :A
Discussion
40.

In which of the following option incorrect major product is shown?

Answer»




ANSWER :B
Discussion
41.

In which case is a reaction impossible at any temperature ?

Answer»

`DELTAHGT0,DeltaSgt0`
`DeltaHgt0,DeltaSlt0`
`DELTAHLT0,DeltaSlt0`
in all cases

Answer :B
Discussion
42.

In which case first has lower melting point than second ?

Answer»




SOLUTION :
Discussion
43.

In which case first has higher solubility than second ? (I)Phenol, Benzene , (II)Nitrobenzene, Phenol , (III)o-Hydroxybenzaldehyde, p-Hydroxy benzaldehyde , (IV)Ethanal, Dimethylether, (V)

Answer»

only I
III,IV
I,IV
I,IV,VI

Solution :
Discussion
44.

In which case formation of butane nitrile. is possible ?

Answer»

`C_3H_7Br+KCN`
`C_4H_9Br+KCN`
`C_3H_7OH+KCN`
`C_4H_9OH+KCN`

ANSWER :A
Discussion
45.

In which case ether is formed-

Answer»

`(CH_(3))_(3)C-Br+overset(ө)(CN)`
`CH_(3)CH_(2)Br+(CH_(3))_(3)CO^(-)`
`(CH_(3))_(3)C-Cl+overset(ө)(OC)_(2)H_(5)`
None of the above.

Answer :B
Discussion
46.

In which case (E_(cell)-E_(Cell)^(@)) is zero:

Answer»

`Cu|Cu^(2+)(0.01M)||AG^(+)(0.1M)|Ag`
`PT(H_(2))|pH=1||ZN^(2+)(0.01M)|Zn`
`Pt(H_(2))|pH=1||Zn^(2+)(1M)|Zn`
`Pt(H_(2))|H^(+)(0.01M)||Zn^(2+)(0.1M)|Zn`

Answer :A::B
Discussion
47.

In which of the followingoctahedral complexes of Co(Z = 27) will the magnitude of Delta_(0) be the highest?

Answer»

`[CO(NH_(3))_(6)]^(3+)`
`[Co(CN)_(6)]^(3-)`
`[Co(C_(2)O_(4))_(3)]^(3-)`
`[Co(H_(2)O)_(6)]^(3+)`

SOLUTION :`CN^(-)` is the STRONGEST of all the ligands.
Discussion
48.

In which of the following octahedral complexes of Co(at. no. 27), will the magnitude of Delta_(0) be the highest ?

Answer»

`[Co(C_(2)O_(4))_(3)]^(3-)`
`[Co(H_(2)O)_(6)]^(3+)`
`[Co(NH_(3))_(6)]^(3+)`
`[Co(CN)_(6)]^(3-)`

Answer :D
Discussion
49.

In which of the following octahedral complexes of cobalt (atomic number = 27) will the magnitude of Delta_0 be the highest?

Answer»

`[CO(C_2O_4)_3]^(3-)`
`[Co(H_2O)_6]^(3+)`
`[Co(NH_3)_6]^(3+)`
`[Co(CN)_6]^(3-)`

ANSWER :D
Discussion
50.

In which of the following octahedral complexes of Co (at. no. 27), will the magnitude of Delta_o be the highest?

Answer»

`[CO(CN)_6]^(3-)`
`[Co(C_2O_4)_3]^(3-)`
`[Co(H_2O)_6]^(3+)`
`[Co(NH_3)_6]^(3+)`

ANSWER :A
Discussion