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 two benzene rings are present

Answer»

Morphine
Heroin
Dimetapp
Codein

Answer :C
Discussion
2.

In which of the following transformations, the bond order has increased and the magnetic behaviour has changed?

Answer»

`C_(2)^(+) to C_(2)`
`NO^(-)to NO`
`O_(2) to O_(2)^(+)`
`N_(2) to N_(2)^(+)`

Solution :`(a)underset(BO=1.5)underset("paramagnetic")(C_(2)^(+)) to underset(BO=2)underset("DIAMAGNETIC")(C_(2))``(B)underset(BO=3)underset("diamagnetic")(NO^(-)) to underset(BO=2.5)underset("paramagnetic")(NO)``(c)underset(BO=2)underset("Paramagnetic") (O_(2)) to underset(BO=2.5)underset("paramagnetic")(O_(2)^(+))``(d) underset(BO=3)underset("diamagnetic")(N_(2)) to underset(BO=2.5)underset("paramagnetic")(N_(2)^(+))`
Discussion
3.

In which of the following transition, the wavelengthwill be minimum :

Answer»

N = 6 to n = 4
n = 4 to n = 2
n = 3 to n = 1
n = 2 to n = 1

Answer :C
Discussion
4.

In which of the following transformations, oxygen is not the reducing agent?

Answer»

`Ag_(2)O to 2AG + 1/2O_(2)`
`Fe_(2)FO_(3) + 3CO to 2Fe + 3CO_(2)`
`2K + F_(2) to 2KF`
`BaCl_(2) + H_(2)SO_(4) to BaSO_(4) + 2HCl`

SOLUTION :`NH_(3)` is oxidised to `N_(2)` by `O_(2)`. Thus `O_(2)` is oxidising agent and not a reducing agent.
Discussion
5.

In which of the following titrations phenolphthalein can be used as indicator ?

Answer»

NAOH with `H_(2)CO_(3)`
KOH with `CH_(3) COOH`
`NH_(4)OH` with HCl
`NH_(4) OH` with `CH_(3) COOH`

Answer :A,B
Discussion
6.

In which of the following thermochemical changes DeltaH^@ is always negative?

Answer»

ENTHALPY of solution
Crystal LATTICE enthalpy
Enthalpy of atomization
Enthalpy of ionization

Answer :B
Discussion
7.

In which of the following there is intermolecular hydrogen bonding ?

Answer»

Water
Ethanol
Acetic acid
H-F

Answer :A::B::C::D
Discussion
8.

In which of the following the van.t Hoff Factor (i) is equal to one ?

Answer»

NACL
`KNO_3`
Urea
All

Answer :C
Discussion
9.

In which of the following the van't Hoff Factor (i) is equal to one ?

Answer»

NACL
`KNO_3`
Urea
All

Answer :C
Discussion
10.

In which of the following, the reaction proceeds towards completion

Answer»

`K=10^(3)`
`K=10^(-2)`
`K=10^(-2)`
`K=1`

Solution :Those REACTON which have more VALUE of K PROCEEDS TOWARDS completion.
Discussion
11.

In which of the following the oxidation number of metal ion is zero?

Answer»

 `Ni(CO)_(4)`
`Fe_(2)(CO)_(9)`
`NA[Co(CO)_(4))]`
 `CU`

Answer :A::B::C
Discussion
12.

In which of the following, the ore does not match with the metal ?

Answer»

Copper - Malachite
IRON - HAEMATITE
Aluminium - Bauxite
ZINC - Siderite

Answer :D
Discussion
13.

In which of the following the inert pair effect is most prominent

Answer»

C
SI
Ge
Pb

Solution :The inert pair effect is most PROMINENT in Pb because from TOP to bottom due to increases in NUMBER of shells.
Discussion
14.

In which of the following the impure metal not purified by the oxidation of impurites

Answer»

silver CONTAINING lead
preparation of wrought IRON from pig iron
ZINC containing iron and cadmium
bessemerisation of pig iron

Answer :C
Discussion
15.

In which of the following compounds the halogen is not bonded to sp^(3) carbon ?

Answer»

Ethylidene DICHLORIDE
Chloroethyl BENZENE
3-chlorocyclohex-1-ene
1-chlorocyclohex-1-ene

ANSWER :D
Discussion
16.

In which of the following the hydration energy is higher than the lattice energy ?

Answer»

`MgSO_(4)`
`RaSO_(4)`
`SrSO_(4)`
`BaSO_(4)`

ANSWER :A
Discussion
17.

In which of the following compound(s), the colour is due to the charge transfer spectra

Answer»

`KMnO_(4)`
`CrO_3`
`CuCl_2`
`Cu_2O`

SOLUTION :`ubrace(Mn^(+7))_(3d^0),CR^(+6),ubrace(CU^(+1))_(3d^(10))}` No UNPAIRED d- electrons
Discussion
18.

In which of the following the electric dipoles are spontaneously polarised even in the absence of electric field.

Answer»

ROCHELLE SALT
`TbTiO_3`
`SiO_2`
`PB ZrO_3`

ANSWER :A
Discussion
19.

In which of the following compounds, the C-Cl bond ionisation shall give most stable carbonium ion

Answer»




SOLUTION :
Discussion
20.

In which of the following the conductivity would be in the order of 10^(-4) ohm^(-1)cm^(-1)

Answer»

`NaCI_(s)`
`Na_(s)`
DIAMOND
Ge

Answer :D
Discussion
21.

In whichof the followingthe H - C-Hbondangleis themaximu ?

Answer»

`C_(6)H_(6)`
`C_(2) H_(6)`
`C_(2) H_(4)`
`C_(2) H_(2)`

Answer :D
Discussion
22.

In which of the following compounds, the C - Cl bond ionisation shall give most stable carbonium ion ?

Answer»




SOLUTION :

Most STABLE CARBONIUM ions is benzyl carbocation due to resonance.
Discussion
23.

In which of the following, the central metal atom is behaving as a lewis acid ?

Answer»

`[NiCl_(2)(H_(2)O)_(4)]`
`[COCL(NH_(3))_(5)]^(2+)`
`[Fe(CN)_(6)]^(3-)`
`[Ni(CO)_(4)]`

Solution :C.A. always behave as Lewis acid.
Discussion
24.

In which of the following the central atom is present in its highest oxidation state?

Answer»

`[FE(CN)_(6)]^(-4)`
`[NiCl_(4)]^(2-)`
`[Cr(H_(2)O)_(6)]^(3+)`
`[Se(H_(2)O)_(6)]^(+3)`

Solution :Maximum OXIDATION state of Sc is + 3.
Discussion
25.

In which of the following compounds, the C-Cl bond ion-isation shall give most stable carbonium ion?

Answer»




ANSWER :D
Discussion
26.

In which of the following compounds carbon oxygen bond length is shorter than others

Answer»

`CH_3 COO^(-)`
` CH_3COOH`
` CH_3COOC_2H_5`
` CH_3COCl`

ANSWER :A
Discussion
27.

In which of the following compounds, the C-Cl bond ionisation shall give most stable carbocation ion?

Answer»




SOLUTION :The compound (d) GIVES a TERTIARY carbocation which is MAXIMUM stable
.
Discussion
28.

In which of the following, the C-H bond length is shortest ?

Answer»

ETHANE
Ethene
Ethyne
Benzene

Answer :C
Discussion
29.

In which of the following , the bond length between carbon and carbon atom is equal

Answer»

2-butene
BENZENE
1-butene
1-propyne

Solution :In benzene DUE to resonance all the carbon-carbon BOND lengths are EQUAL 1.39 Å which is between C-C (1.54 Å) and C=C (1.34 Å)
Discussion
30.

In which of the followingthe angle between the two covalent bonds is greatest ?

Answer»

`CO_2 `
`CH_4`
`NH_3 `
`H_2O`

ANSWER :A
Discussion
31.

In which of the following compounds octet is complete and incomplete for all atoms :

Answer»

`{:(Al_(2)Cl_(6),Al_(2)(CH_(3))_(6),AlF_(3),"Dimer of "BeCl_(2),"Dimer of "BeH_(2)),(IC,IC,IC,C,C):}`
`{:(Al_(2)Cl_(6),Al_(2)(CH_(3))_(6),AlF_(3),"Dimer of "BeCl_(2),"Dimer of "BeH_(2)),(C,IC,IC,C,IC):}`
`{:(Al_(2)Cl_(6),Al_(2)(CH_(3))_(6),AlF_(3),"Dimer of "BeCl_(2),"Dimer of "BeH_(2)),(C,IC,C,IC,IC):}`
`{:(Al_(2)Cl_(6),Al_(2)(CH_(3))_(6),AlF_(3),"Dimer of "BeCl_(2),"Dimer of "BeH_(2)),(IC,C,IC,IC,IC):}`

Solution :(i)(ii)
(ii) `underset("ionic COMPOUND")(AlF_(3)) to underset("octet complete")underset(2S^(2)2p^(2))(AL^(3+))+ underset("octet complete")underset(2s^(2)2p^(6))(2s^(2)2p^(6))` (iv) (incomplete)
(v) (incomplete)
Discussion
32.

In which of the following, the bond angle is maximum ?

Answer»

`NH_(3)`
`NH_(4)^(+)`
PCl_(3)
`SCl_(2)`

Answer :B
Discussion
33.

In which of the following tert. Carnon is absent

Answer»

Isoctane
Triptae
Isopropyl AMINE
ISOPENTANE

Solution :isooctane `C-underset(C)underset(|)overset(C)overset(|)(C)-C-underset(C)underset(|)(***)(C)-C(1-3^(@)` CARBON atom)
Triptane `C-underset(C)underset(|)overset(C)overset(|)(C)-underset(C)underset(|)(C)-C(1-3^(@)` carbon atom)
Isopropyl amine `C-underset(C)underset(|)(C)-NH_(2)` (no TERT. carbon atom)
Isopentane `C-underset(C)underset(|)(***)(C)-C-C` (1- tert. carbon atom)
Discussion
34.

In which of the following system, dobbling the volume of the container cause a shify to the right

Answer»

`H_(2(g))+Cl_(2(g))=2HCl_((g))`
`2CO_((g))+O_(2(g))=CO_(2(g))`
`N_(2(g))+3H_(2(g))=2NH_(3(g))`
`PCl_(5(g))hArrPCl_(3(g))+Cl_(2(g))`

SOLUTION :Increase in volume. i.e., decrease in pressure SHIFTS the equlibrium in the DIRECTION in which number of moles increases `(Deltan` positive)
Discussion
35.

In which of the following compounds , nitrogen exhibits highest oxidation state ?

Answer»

`N_(2)H_(4)`
`NH_(3)`
`N_(3)H`
`NH_(2)OH`

Solution :`N_(2)H_(4)rArr2x+4(+1)or2x+4=0`
`therefore""x=-2`
`NH_(3)rArrx+3(+1)=0orx+3=0`
`therefore""x=-3`
`N_(3)HrArr3x+1(+1)=0or3x+1=0`
`therefore"" x=-1//3`
`NH_(2)OHrArrx+2+(-2)+1=0orx+1=0`
`therefore "" x=-1`
THUS , highest oxidation STATE is `-1//3`.
Discussion
36.

In which of the following substrates, rate of Benzoin substrates, rate of condensation will be maximum ?

Answer»





Solution :
BENZOIN condensation is due to STABILITY of intermediate (III) when negative CHARGE on Cextensively delocalised in benzene RING, nitro and `C-=N` group. In all other cases, such dispersal is not extensively possible. On the other hand, `NO_(2)-` is alsocreating a positive charge center on carbonyl CARBON, making it more suceptible to nucleophilic attack of `CN^(-)`
Discussion
37.

In which of the following compounds, nitrogen exhibits highest oxidation state ?

Answer»

`N_(3)H`
`NH_(2)OH`
`N_(2)H_(4)`
`NH_(3)`

Answer :A
Discussion
38.

In which of the following compounds, nitration take place at the para-position-

Answer»




ANSWER :B::D
Discussion
39.

In which of the following structures, the cation has maximum coordination number ?

Answer»

`Na_(2) O`
ZINC BLENDE
`CaF_(2)`
NaCl

Answer :C
Discussion
40.

In which of the following compounds more meta product is obtained on electrophilic substitution

Answer»




SOLUTION :`-"CCl"_3`group is more I-Effect, HENCE META substitution is possible causes more meta product
Discussion
41.

In which of the following compounds manganese has oxidation number equal to that of iodine in KIO_(4)?

Answer»

potassium manganate
potassium PERMANGANATE
manganous CHLORIDE
MANGANESE chloride

ANSWER :B
Discussion
42.

In which of the following compounds iron has zero oxidation state

Answer»

`FE(CO)_5`
`Fe_2O_3`
`FEO`
`Fe_3O_4`

ANSWER :A
Discussion
43.

In which of the following compounds hydrolysis tkes plcae through S_(N^(1)) and S_(N^(2)) mechanism respectively?

Answer»

`NF_(3), NCl_(3)`
`P_(4)O_(10), SiCl_(4)`
`SF_(4), TeF_(6)`
`SiCl_(4),SiF_(4)`

Answer :A
Discussion
44.

In which of the following compounds does the ratio of the anion size to the catton size have the lowest value?

Answer»

1. NaCl
2. KCl
`3. MgCl_(2)`
4. `NaBr`

Answer :B
Discussion
45.

In which of the following structures coordination number for cations and anions in the packed structure will be same-

Answer»

`Cl^(-)` ion form fcc lattice and `Na^(+)` ions occupy all OCTAHEDRAL voids of the unit cell
`CA^(2+)` ions form fcc lattice and `F^(-)` ions occupy all the eight tetrahedral voids of the unit cell
`O^(2-)` ions form fcc lattice and `Na^(+)` ions occupy all the eight tetrahedral voids of the unit cell
`S^(2-)` ions form fcc lattice and `Zn^(2+)` ions go into ALTERNATE tetrahedral voids of the unit cell

Answer :A
Discussion
46.

In which of the following compounds does the ratio of anion to cation size have the lowest value?

Answer»

NaCl
KCl
`MgCl_2`
NaBr

Answer :B
Discussion
47.

In which of the following steps largest number of ATP are produced :

Answer»

Glycolysis
Kreb's cycle
Hydrolysis
Terminal RESPIRATORY chain

Answer :B
Discussion
48.

In which of the following compounds does the central atom obey EAN rule:

Answer»

`k_3Fe(CN)_6`
`k_4Fe(CN)_6`
`CU(NH_3)_4SO_4`
All

Answer :B
Discussion
49.

In which of the following statements is/are correct ?

Answer»

Both reactions proceed by `SN^(1)` mechanism.
Both reactions PROCEEDS by `SN^(2)` mechanism.
REACTION (I) proceeds by `SN^(1)` and reaction (II) by `SN^(2)` mechanism.
Reaction (I) proceeds by `SN^(2)` and reaction (II) by `SN^(1)` mechanism.

Solution :NA
Discussion
50.

In which of the following compounds, Cl is not easily replaced?

Answer»

`CH_(3)CL`

`CH_(2)=CHCH_(2)Cl`

Answer :D
Discussion