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 compounds an element exhibits two different oxidation states ?

Answer»

`NH_2OH`
`NH_4NO_3`
`N_2H_4`
`N_3H`

Solution :`NH_4NO_3` EXISTS as `NH_4^+ and NO_3^(-)` IONS. The O.N. of N in `NH_4^(+)` is - 3 and `NO_3^(-) , ` O.N. is +5.
Discussion
2.

In which of the following compound the solubility decreases with increase of temperature?

Answer»

sodium chloride
ammonium NITRATE
ceric sulphate
calcium chloride

SOLUTION :ceric sulphate
Discussion
3.

In which of the following compound the solubility decreases with increase of temperature ?

Answer»

SODIUM chloride
ammonium NITRATE
CERIC sulphate
calcium chloride

ANSWER :C
Discussion
4.

In which of the following compound, oxydation number of oxygen is positive ?

Answer»

`BaO_(2)`
`KO_(2)`
FeO
`F_(2)O`

SOLUTION :(i) Ba, K and Fe are metals, they form `Ba^(2+),K^(+)andFe^(2+)` ions with oxygen, therefore O of `BaO_(2),KO_(2)andFeO` is negative.
(ii) ELECTRONEGATIVITY of `O(3.0)ltF(4.0)`,
As Oxygen has LESS electronegativity, O atom of `F_(2)O` is Positive.
Discussion
5.

In which of the following compound sp^(2)- hybridisation is absent?

Answer»

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

Solution :`overset(sp)(C H)= overset(sp)(C )- overset(sp^(3))(C II_(2)) - overset(sp^(3))(CH)_(3)`: In but-1-yne there is no CARBON with `sp^(2)`-hybridization
Discussion
6.

In which of the following compound nitrogen exhibits highest oxidation state?

Answer»

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

Answer :C
Discussion
7.

In which of the following compound chlorine has highest oxidation number ?

Answer»

KCl
HCLO
`HClO_(2)`
`HClO_(4)`

ANSWER :D
Discussion
8.

In which of the following compound an element exhibits two different oxidatin states

Answer»

Solution :Ammoneium NITRATE is an IONIC compound it CONSISTS of two ions i.e `NH_(4)^(+)` and `NO_(3)^(-)` The O.N of N in the two species is different as shown below
O.N of N in `NH_(4)^(+)=x+(4xx1)=+1 or x =- 3 O.N of N in NO_(3)^(-) =x+3(-2)=- or x =+5`
Discussion
9.

In which of the following combinatins of HCL and NaOH, the heat energy liberated is maximum

Answer»

10ml of 0.1m HCl + 40 ml of 0.1 M NaOH
30 ml of 0.1M HCl + 20 ml of 0.1 M NaOH
25ml of 0.1M HCl + 25 ml of 0.1 M NaOH
35ml of 0.1M HCl+ 15 ml of 0.1 M NaOH

Solution :more eq. neutralized `RARR` more heat energy
Discussion
10.

which of the following orbitals has zero probability of finding the electron in xy plane

Answer»

XZ and YZ-planes
xy and yz-planes
z-direction, yz and xz-planes
xy and xz-planes

Answer :A
Discussion
11.

In which of the following cases, the reaction goes farthest to completion ?

Answer»

`AhArrB(K=10^(3))`
`PHARRQ(K=10^(-2))`
`A+BhArrC+D(K=10)`
`X+YhArrXY_(2)(K=10^(-1))`

Answer :A
Discussion
12.

In which of the following cases equivalent mass of a reductant is equal to its molecular mass-

Answer»

`Cr_(2)O_(7)^(2-)+6I^(-)14H^(+)to2Cr^(3+)+3I_(2)+7H_(2)O`
`MnO_(4)^(-)+5Fe^(2+)8H^(+)to5F^(3+)+MN^(2+)+4H_(2)O`
`2Na_(2)S_(2)O_(3)+I_(2)toNa_(2)S_(4)O_(6)+2NaI`
`MnO_(4)^(-)5C_(2)O_(4)^(2-)+16H^(+)toMn^(2+)+10CO_(2)+8H_(2)O`

Answer :B::C
Discussion
13.

In which of the following cases enol content will be higher than the keto content in n-hexane?

Answer»

`CH_(3)-overset(O)overset(||)C-overset(O)overset(||)C-CH_(3)`


`H_(5)C_(2)O-overset(O)overset(||)C-CH_(2)=overset(O)overset(||)C-OC_(2)H_(5)`

Solution :`CH_(3)-overset(O)overset(||)C-underset(O)underset(||)C-CH_(3)`

less repulsion between two `overset(O)underset( C )(||)` bonds More repulsion C - C BOND ROTATIONS not Possible and two `overset(O)underset( C )(||)` are more stable than `overset(O)underset( C )(||)` & C = C bond. Repulsions minimised and stabilized by H- bonding.

dve methylene group is PRESENT in between two strong electron with drawing groups.
Discussion
14.

In which of the following cases does reaction go the farthest for completion ?

Answer»

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

ANSWER :D
Discussion
15.

In which of the following cases, does the reaction go farthest to completion

Answer»

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

SOLUTION :more K `IMPLIES` FARTHEST to complection
Discussion
16.

In which of the following can peroxide effect operate ?

Answer»

`CH_3CH_2CH=CH_2+HCl`
`CH_3CH_2CH=CH_2+HBr`
`CH_3CH=CHCH_3+HBr`
`CH_3CH_2CH=CH_2+HI`

Solution :Only addition of HBr to unsymmetrical alkenes SHOWS PEROXIDE EFFECT. Thus, option (b) is CORRECT.
Discussion
17.

In which of the following bonds are polar but molecule is non-polar

Answer»


`SF_6`
`CHCl_3`

ANSWER :B
Discussion
18.

In which of the following bond the heterolytic fission is most easily?

Answer»

`C-C`
`C-H`
`O-H`
`C-O`

ANSWER :C
Discussion
19.

In which of the following bond angle is maximum ?

Answer»

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

Answer :C
Discussion
20.

In which of the following Aufbau principle is violated ?

Answer»




ANSWER :B
Discussion
21.

In which of the following arrrangements octahedral voids are formed ?

Answer»

hcp
bcc
simple cubic
FCC

Solution :OCTAHEDRAL voids are formed in close PACKING VIZ hcp and fcc
Discussion
22.

In which of the following arrangements, the sequence is not strictly according to the property written against it?

Answer»

`HF LT HCI lt HBr lt HI`: increasing acid strength
`NH_(3) lt PH_(3) lt AsH_(3) lt SbH_(3):` increasing basic strength
`B lt C lt O lt N`: increasing first ionization enthalpy
`CO_(2) lt SiO_(2) lt SnO_(2) lt PbO_(2)`: increasing oxidising power

Answer :B
Discussion
23.

In which of the following arrangements the order is not according to the property indicated against it?

Answer»

`Al^(3+) lt Mg^(2+) lt Na^(+) lt F^(-) `- increasing ionic SIZE <BR>`B lt C lt N lt O ` - increasing FIRST ION ization enthalpy
`I lt Br lt F lt Cl ` - increasing electron gain enthalpy
`Li lt Na lt K lt Rb` - increasing metallic radius

Solution :`B lt C lt N lt O ` - increasing first ion ization enthalpy
`{:("First Ionisation energy of Nitrogen"):} gt {:("First ionisation energy of Oxygen"):}`
`Delta_(i)H_(1)(N) gt Delta_(i)H_(1)(O)`
Which is `1402 gt 1214 " kJ mol"^(-1)`
Discussion
24.

In which of the following arrangements, the order is correct according to the property indicated against it ?

Answer»

`Al^(3+) lt Mg^(2+) lt Na^(+) lt F`-increasing ionic SIZE<BR>`B lt C lt N lt O` - increasing first ionization ENTHALPY
`I lt Br lt F lt CL`- increasing electron gain enthalpy (with negative sign)
`Li lt Na lt K lt Rb` -increasing metallic radius

Answer :A::C::D
Discussion
25.

In whichof the following arrangements, the givensequence is not strictly according to the property indicatedagainst it ?

Answer»

`HF lt HCl lt HBr lt HI` : increasing acidie strength
`H_(2)O lt H_(2)S lt H_(2)Se lt H_(2)Te`: increasing`pK_(a)` values
`NH_(3) lt PH_(3) lt AsH_(3) lt SbH_(3)` : increasing ACIDIC character
`CO_(2) lt SiO_(2) lt SnO_(2) lt PbO_(2)` : increasing oxidising power

Solution :Acidity increases or `pK_(a)`the `H-M`bond strengthdecreasesfrom O toTe. Thus, OPTION (b) is not correct.
Discussion
26.

In which of the following arrangements octahedral voids are formed ?

Answer»

HCP
bcc
simple cubic
fcc

Solution :OCTAHEDRAL voids are FORMED in CLOSE packing viz hcp and fcc.
Discussion
27.

Which of the following is the correct order of electron affinity

Answer»

<P>`S GT O^-`
`O^(-) lt S^(- -)`
`O^(-) gt S^(- -)`
`N^(-) gt P`

Answer :A::B
Discussion
28.

In which of the following, ammonia is not present ?

Answer»

Nessler's reagent
GROUP reagent for the analysis of BASIC RADICALS of group IV
Group reagent for the analysis of basic radicals of group III
Tollen's reagent

Solution :Nessler's reagent `K_(2)Hgl_(4)` does not contain `NH_(3)` in it
Discussion
29.

In which of the following alpha -elimination occurs ? .

Answer»

`(I),(II)`
`(I),(IV)`
`(II),(III)`
`(II),(IV)`

ANSWER :B
Discussion
30.

In which of the following all carbon atoms are of same hybridisation

Answer»

1, 3 - Butadiene
HEXANE
Acetylene
All the above

Solution :All CARBON atoms in option 1, 2, 3 under goes same TYPE of hybridization.
Discussion
31.

In which of the following, all are nucleophiles?

Answer»

`H_2 O, NO_(2)^(+), (CH_3)_3 N`
`HS^(-), BF_3, CH_3 C^(+) = O`
`SH^(-), C_2 H_5 O^(-) , (CH_3)_3 N`
`NO_2^(+), BF_3, CI^(+)`

Answer :C
Discussion
32.

In which of the compounds given below is there more than one kind of hybridization (sp, sp_(2), sp_(3)for carbon? (i) CH_(3)CH_(2)CH_(2)CH_(3) (ii) CH_(3) - CH = CH - CH_(3) (iii) CH_(2) = CH - CH= CH_(2) (iv)H - C-= C - H

Answer»

(II) and (IV)
(i) and (iv)
(ii) and (III)
(ii)

ANSWER :D
Discussion
33.

In which of the compound sp^(2)-sp^(2)-sp-sp hybridization shift from left to right?

Answer»

`CH_(2)=CH-CH -=N`
`CH -=C-C -=CH`
`CH_(2)= C= C=CH_(2)`
`CH_(2)= CH-CH=CH_(2)`

ANSWER :A
Discussion
34.

In which of the following conditions the de Broglie wavelentgh of particle A will be less than that of particle B (m_(A) gt m_(B)) ?

Answer»

Linear momentum of these particles are same
MOVE with same speed
Move with same kinetic energy
Have FALLEN through same HEIGHT

SOLUTION :`lambda = h/(m UPSILON)`
for same speed, `lambda_A lt lambda_B` because `m_A gt m_B`.
Discussion
35.

In which of following solvents is silver chloride most soluble ?

Answer»

0.1 mol `dm^(-3) AgNO_3`, solution
0.1 mol `dm^(-3)` HCl solution
`H_2O`
AQUEOUS AMMONIA

Solution :In the GIVEN SOLVENT, AgCl is most soluble in aqueous ammonia solution. AgCl react with aqueous ammonia to FORM a complex,`[Ag(NH_3)^2]^(+)Cl^-`
Discussion
36.

In which octet rule is obeyed· or not ? (1) PCl_(5) "(2) " SF_(6) "(3) " PF_(5) "(4) " NH_(4)^(+) (5) BeCl_(2) "(6) " NCl_(3)"(7)" BeF_(4)^(2-)"(8) " BF_(3) (9) NO (10)NH_(3)

Answer»

SOLUTION :OBEY of octet RULE is shown in the FOLLOWING table.
Discussion
37.

In which of following carbocation rearragement take place with change carbon skeleton :

Answer»

`CH_(3)-underset(CH_(3))underset(|)overset(CH_(3))overset(|)C-overset(o+)CH_(2)`
`CH_(3)-CH_(2)-overset(o+)CH_(2)`
`CH_(3)-underset(CH_(3))underset(|)CH-CH_(2)-overset(o+)CH_(2)`
`CH_(3)-underset(CH_(3))underset(|)overset(CH_(3))overset(|)C-CH_(2)-CH_(2)-overset(o+)CH_(2)`

Solution :`underset(1^(underset(-)o)-"carbocation")(CH_(3)-underset(CH_(3))underset(|)overset(CH_(3))overset(|)C-overset(o+)CH_(2))overset("MIGRATION of -me GROUP")to underset(3^(underset(-)o)-"carbocation (more STABLE)")(CH_(3)-underset(o+)overset(CH_(3))overset(|)C-CH_(2)-CH_(3))`
Discussion
38.

Inwhich of compounds octet is complete and incomplete for all atoms:(C for complete octet and IC for incomplete octet) Al_(2)Cl_(6) Al_(2)(CH_(3))_(6) AlF_(3) Be_(2)Cl_(4) Be_(2)H_(4)

Answer»

`"IC IC IC C C"`
`"C IC IC C C"`
`"C IC C IC IC"`
`"IC C IC IC IC"`

ANSWER :C
Discussion
39.

In which type of bond fomation, can a proton participate?

Answer»

HYDROGEN bond
Electrovalent
Dative
COVALENT and dative

Answer :C
Discussion
40.

In which o fthe following compounds O.N of carbon in Zero: (i) CH_(4) ,(ii) HCHO ,(iii)C_(6)H_(12)O_(16) ,(iv) CCI_(2)F_(2)

Answer»


Answer :`(II) HCHO ,(III) C_(6)H_(12)O_(6)`
Discussion
41.

In which molecule the bond is form by p - p overlapping ?

Answer»

`H_(2)`
`H_(2)O`
HCL
`Cl_(2)`

SOLUTION :`Cl_(2)`
Discussion
42.

In which molecule coordinate bond is not present?

Answer»

`H_(3)O^(+)`
`NH_(4)^(+)`
`BF_(4)^(-)`
`CO_(3)^(2-)`

Solution :`CO_(3)^(2-)`
Discussion
43.

In which mixture the different entities of mixture can be separated from borderline surface ?

Answer»

NACL and `H_(2)O`
NaCl and Fe
Sugar solution
None of these

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

In which medium H_2O_2 act as reducing agent?

Answer»


ANSWER :ACIDIC, BASIC
Discussion
45.

In which layer of atmosphere ozone is present?

Answer»

TROPOSPHERE
THERMOSPHERE
STRATOSPHERE
Mesosphere

Solution :Stratosphere
Discussion
46.

In which is transfer of five electrons takes place ?

Answer»

a. `MnO_(4)^(-) rarrMn^(2+)`
b.`CrO_(4)^(-2) rarrCr^(3+)`
c.`MnO_4rarrMnO_2`
d. `Cr_(2)O_(7)^(2-) rarr2Cr^(3+)`

SOLUTION :`overset(+7)(MnO_(4)^(-))overset(5e^(-))rarrMn^(+2)`
Discussion
47.

In which, iron has the lowest oxidation state ?

Answer»

`Fe(CO)_5`
`Fe_2 O`
`K_4Fe(CN)_6`
`FeSO_4(NH_4)_2SO_4 6H_2O`

Solution :`overset(0)(Fe)(CO)_5,overset(+1)(Fe_(2))O,K_(4)overset(+2)(Fe)(CN)_6`
`overset(+2)(Fe)SO_(4)(NH_4)_(2)SO_(4).6H_(2)O`
Discussion
48.

In which industry, ZSM-5 catalyst is used ?

Answer»

COLOUR INDUSTRY
Petroleum industry
Pharmaceutical industry
POLYMER industry

Answer :B
Discussion
49.

In which hybridization the maximum bond angle in following ?

Answer»

SP
`sp^(2)`
`sp^(3)`
`DSP^(2)`

SOLUTION :sp
Discussion
50.

In which hybridization 90^(@) angle are more ?

Answer»

`DSP^(2)`
`SP^(3) d^(2)`
`dsp^(3)`
`sp^(3)` d

SOLUTION :`sp^(3) d^(2)`
Discussion