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.

Choose the correct statement among the following:

Answer»

RADIAL distribution function `(psi^(2). 4pir ^(2)DR)` give probability at a particular distance ALONG any chosen direction.
`psi^(2)(r )` give probability density at a particular distance over a spherical surface.
For 's' orbital `psi(r ) psi (THETA) psi (phi) = psi (x,y,z)` is independent of `theta and theta.`
`"2p'` orbital with quantum numbers.` N = 2,l=1, m =0,` also shows angular dependence

Answer :A::C::D
Discussion
2.

Choose the correct statement about the equilibrium A(s)+2B(g)hArrC(g)+D(g)

Answer»

change in temp. changes both the state of eqb. and the eqb. CONSTANT
change in PRESSURE changes both the state of eqb. and the eqb. constant
change in TEMPERATURE changes eqb. constant but not the state of eqb.
change in pressure does not AFFECT either eqb. constant or state of eqb.

Answer :A::D
Discussion
3.

Choose the correct statement about Metal Carbonyls :

Answer»

Decacarbonyl-dimanganese(0) is made up of two square pyramidal `Mn(CO)_(5)` units joined by a Mn-Mn bond
Octahedral-dicobalt(0) has a Co-Co bond BRIDGED by two CO GROUPS
`M-C pi-bond` is FORMED by the donation of a pair of electrons from a filled d-orbital of METAL into the vacant antibonding `pi^(**)` orbital of carbon monoxide
A total of TEN M-C `sigma bonds` are present in `[Co_(2)(CO)_(8)]` complex

Solution :
Discussion
4.

Choose the correct statement:

Answer»

Diethylether with chlorine in presence of sunlight forms `(C_(2)Cl_(5))_(2)O`.
The formula of diethyl OXONIUM chloride is `(C_(2)H_(5))_(2)-O^(+)CL^(-)`.
In anisole OXYGEN is strongly bonded to benzene ring.
ETHER is used as solvent for Grignard reagent.

Answer :B
Discussion
5.

Choose the correct statement :

Answer»

1 MOLE of `MnO_4^(-)` ion can oxidised 5 moles of `Fe^2+` ion in acidic medium
1 mole of `Cr_2O_7^2-` ion can oxidised 6 moles of `Fe^2+` ion in acidic medium
1 mole of `Cu_2S` ion can oxidised 1.6 moles of `MnO_4^(-)` ion in acidic medium
1 mole of `Cu_2S` ion can oxidisedby 1.33 moles of `Cr_2O_7^2-` ion in acidic medium

Solution :USE equivalent of OXIDISING AGENT =equivalent of reducing agent
Discussion
6.

Choose the correct set from the following options regarding the hybridisation of central atom and shape.

Answer»

`SnCl_(2),SP^(2)`, linear
`AlCl_(4)^(-),sp^(3)`, square planar
`SOCl_(2),sp^(2)`, planar
`COF_(2),sp^(2)`, planar

Solution :`F-OVERSET(O)overset(||)C-F,sp^(2)`
Discussion
7.

Choose the correct sequence for the geometry of the given molecules Borazon, Borazole,B_(3)O_(6)^(3-), trimer of FCN. ['P' stands for planer and 'NP' standes for non-planer]

Answer»

<P>NP, NP, NP, P, P
P, P, NP, NP, P
NP, NP, NP, P, NP
NP, P, P, NP, P

Answer :D
Discussion
8.

Choose the correct relationship for glucose and fructose

Answer»

these are FUNCTIONAL isomers
these are CHAIN isomers
these are POSITION isomers
all of these

Answer :A
Discussion
9.

Choose the correct reason(s) for the stability of the lyophobic colloidal particles

Answer»

Preferential adsorption of ions on their surface from the solution 
Preferential adsorption of solvent on their surface from the solution 
ATTRACTION between DIFFERENT particles having opposite charges on their surface. 
Potential difference between the FIXED layer and the diffused layer of opposite charges around the COLLOIDAL particles.

Solution :Lyophobic COLLOIDS stability depends on preferential adsorption of ions & potential difference
Discussion
10.

Choose the correct reason(s) for the stability of the lyophobic colloidal particles.

Answer»

Preferential adsorption of IONS on their SURFACE from the solution.
Preferential adsorption of solvent on their surface from the solution
Attraction between DIFFERENT particles having opposite charges on their surface.
Potential difference between the fixed LAYER and the diffused layer of opposite charges around the COLLOIDAL particles.

Answer :A::D
Discussion
11.

Choose the correct reason (s) for the stability of lyophobic colloidal particles

Answer»

Preferential adsorption of ions on THIR surface form the SOLUTION
Preferential adsorption of SOLVENT on the surface from the solution
ATTRACTION betweenn different particles having opposite charges on their surface
Potential DIFFERENCE between the fixed layer and the diffused layer of opposite charges around the colloidal particles

Solution :Stability o lyophobic colloids is due to (a) and (d).
Discussion
12.

Choose the correct reaction:

Answer»

`BaCl_(2)+AcOH+K_(2)CrO_(4)to`yellow ppt.
`BaCO_(3)(s)+K_(2)C_(2)O_(4)+AcOH to`white ppt.
`BaCO_(3)(s) +K_(2)CrO_(4)+AcOH to`No ppt.
`SrCO_(3)(s)+K_(2)CrO_(4)+AcOH to`No ppt.

Solution :`Ba^(2+)` IONS produce yellow ppt. with `CrO_(4)^(2-)`, which is not soluble in `CH_(3)COOH`
`BaCO_(3)` dissolves in `CH_(3)COOH` and produces `Ba^(2+)` ion which gives yellow ppt. with `CrO_(4)^(2-)` which is insoluble in `CH_(3)COOH`
`SrCO_(3)` is soluble in `CH_(3)COOH` and produces `Sr^(2+)` ion which does not GIVE yellow ppt. of `SrCrO_(4)` in `CH_(3)COOH`.
Discussion
13.

Choose the correct pair regarding solubility

Answer»

`CuS lt MNS`
`CoS GT ZnS`
`CdS gt NiS`
`CuS gt ZnS`

Answer :A
Discussion
14.

Choose the correct order or decreasing basic strength of the following compound, in aqueous solution C_(6)H_(5)NH_(2) (II) C_(2)H_(5)NH_(2) (III) NH_(3) (IV) (CH_(3))_(2)NH

Answer»

`I GT II gt III gt IV`
`II gt I gt III gt IV`
`IV gt II gt III gt I`
`IV gt III gt II gt I`

ANSWER :C
Discussion
15.

Choose the correct order of catalytic activity of Cr, V, Fe and Mn metals in increasing order.

Answer»

`Fe LT Mn lt V lt CR`
`Cr lt V lt Fe lt Mn`
`V lt Felt Crlt Mn`
`V lt Crlt Mnlt Fe`

Answer :D
Discussion
16.

Choose the correct order of dissociation enthalpy of M-H bond in the 16th group.

Answer»

`H_(2)S LT H_(2)O lt H_(2)SE lt H_(2)TE`
`H_(2)O GT H_(2)S gt H_(2)Segt H_(2)Te`
`H_(2)S gt H_(2)O gt H_(2)Te gt H_(2)Se`
`H_(2)Se gt H_(2)Te gt H_(2)S gt H_(2)O`

Answer :B
Discussion
17.

Choose the correct order of boiling point for ethanol, ethylene glycol and glycerol.

Answer»

`"ETHANOL" GT "ETHYLENE" "GLYCOL" gt "GLYCEROL"`
Ethanol `gt` glycerol `gt` ethylene glycol
Glycerol `gt` ethylene glycol `gt` ethanol
Glycerol `gt` ethanol `gt` ethylene glycol

Solution :Glycerol `gt` ethylene glycol `gt` ethanol
Discussion
18.

Choose the correct order for the energy barrier to rotation around the B-N bond :-

Answer»

`H_2B-NR_2 lt BH(NR_2)_2 lt B(NR_2)_3`
`B(NR_2)_3 lt BH(NR_2)_2 lt BH_2-NR_2`
`BH(NH_2)_2 GT B(NR_2)_3 gt BH_2-NR_2`
`BH_2 -NR_2 gt B(NR_2)_3 gt BH(NR_2)_2`

ANSWER :B
Discussion
19.

Choose the correct option(s) from the following:

Answer»

Teflon is prepared by heating tetrafluoroethene in presence of a persulphate catalyst at high pressure.
Natural rubber is polyisoprene containing TRANS alkene units.
Nylon-6 has amide LINKAGES.
CELLULOSE has only `alpha`-D-glucose units that are joined by glycosidic linkages.

Answer :A::C
Discussion
20.

Choose the correct options :

Answer»

In `N_2H_4`, the N-N bond length is greater than expected value
In trisilyl AMINE `(SiH_3)_3` N, the Si-N bond length is lesser than expected value
The bond ANGLE in `OF_2` is lesser than `OC l_2`
The Be atom in `BeCl_2(s)` in `sp^3` hybridised

Solution :(A)Structure is similar to that of ethane. Each N atom is tetrahedrally surrounded by one N , two H and a lone pair.The two halves of the molecules are rotated `95^@` about N-N bond and occupy a gauche (non-eclipsed) conformation.The bond length is 1.45 Å.

(B)Has partial double bond character DUE to `ppi-dpi` delocalisation
(C )`OF_2=1.3^@` (approximate) and `OCl_2=112^@`(approximate)
(D)
Discussion
21.

Choose the correct options .

Answer»

ENERGY of shell is given by `(n + l)` rule
Total number of electron in a shell is `2N^(2)`
In `Z= 24` total number of electron having m = 0 values are 12.
Slater's constant for oxygen last electron is y than value of `SIGMA` for C-atom last electron is `(y - 0.70)`

Answer :B::C::D
Discussion
22.

Choose the correct option (s)

Answer»


`Y` is `O_(3)//(CH_(3))_(2)S`

SOLUTION :
Discussion
23.

Choose the correct option (s) :

Answer»

`Fe^(+3)` is strong Lewise ACID than `Fe^(+2)`
In `SF_(2)Cl_(2)` two axial bond lengths are longer compared to two equatiorial bond length.
`SO_(3)` and `SO_(3)^(2-)` are not iosstructural species
`XeO_(2)F_(2)` is SEE - Saw in shape.

Solution :(A) `Fe^(+3)` is strong Lewis acid because it have greater for electrons, as it has a greater `Z_("eff")` than
(b) `d_(S - Cl)` bond length ALWAYS greater than `d_(S - F)` bond length
Discussion
24.

Choose the correct option regarding the following complex compound which follwos (F) and does not follow (NF) the Sidgwick EAN rule: (I) [Ph_(3)P)_(2)PdCl_(2)PdCl_(2)] (II) [NiBrCl(en)] (III) Na_(4)[Fe(CN)_(5)NOS] (IV) Cr(CO)_(3)(NO)_(2)

Answer»

(I)-NF,(II)-NF,(III)-NF,(IV)-NF
(I)-F,(II)-F,(III)-NF,(IV)-F
(I)-NF,(II)-NF,(III)-F,(IV)-F
(I)-NF,(II)-NF,(III)-F,(IV)-NF

Solution :(I) `[(Ph_(3)P)_(2)PdCl_(2)PdCl_(2)],EAN` of Pd=46-2+4`xx2=52`
(II) `[NiBrCl(en)]:` EAN of Ni=28-2+8=34
(III) `[Na_(3)[Fe(CN)_(5)NOS],` EAN of Fe=26-2+`5xx2+2=36`[KR]
(IV) `Cr(CO)_(3)(NO)_(2),`EAN of
`Cr=24-0+3xx2+3xx2=36[Kr]`.
Discussion
25.

Choose the correct option regarding the following complex compound which follows (F) and does not follow (NF) the sidgwick EAN rule : (P)[(Ph_(3)P)_(2)PdCl_(2)PdCl_(2)]""(Q)[NiBrCl(en)] (R)Na_(4)[Fe(CN)_(5)NOS]""(S) [Cr(CO)_(3)(NO)_(2)]

Answer»

`{:("(P)", "(Q)", "(R)", "(S)"),("NF","NF","NF","NF"):}`
`{:("(P)", "(Q)", "(R)", "(S)"),("F","F","NF","F"):}`
`{:("(P)", "(Q)", "(R)", "(S)"),("NF","NF","F","F"):}`
`{:("(P)", "(Q)", "(R)", "(S)"),("NF","NF","F","NF"):}`

ANSWER :C
Discussion
26.

Choose the correct option of temperature at which carbon reduces FeO to iron and produces CO.

Answer»

Below temperature at point A.
Approximately at the temperature CORRESPONDING to point A.
Above temperature at point A but below temperature at point D.
Above temperature at point A. 

SOLUTION :At temperature above point A,
`Delta_f G_((C","CO))^(@) < Delta_fG_((FE","FeO))^(THETA)`
Discussion
27.

Choose the correct option of temperature at which carbon reduces FeO to iron and produces CO.

Answer»

Below TEMPERATURE at POINT A.
Approximately at the temperature CORRESPONDING to point A.
A bovetemperature at point A but below temperature at point D.
Above temperature at point A.

Solution :It is the CORRECT ANSWER.
Discussion
28.

Choose the correct option about the following sentences.(T = True and F = False)(i) In S_(N)1 reaction always raemic mixture is formed and for S_(N)2 reaction in 50% cases racemic mixture is formed.(ii) S_(N)1 reaction occurs through carbonium ion mechanism, while S_(N)2 reaction occurs through free radical mechanism.

Answer»

F, F
T, T
F, T
T, F

ANSWER :A
Discussion
29.

Choose the correct option:

Answer»

Nitrogen comprises 78% by volume of ATMOSPHERE.
It OCCURS in the earth's crust also.
It is FOUND as PROTEIN in plants and animals.
All the above.

Answer :D
Discussion
30.

Choose the correct option

Answer»




ANSWER :A::B::D
Discussion
31.

Choose the correct option:

Answer»

`A` REPRESENTS vapour COMPOSITION and `B` represents liquid composition.
`A` as WELL as `B` REPRESENT liquid composition.
both `A` and `B` represent vapour coposition.
A represents liquid coposition and `B` represents vapour composition.

Solution :N//A
Discussion
32.

Choose the correct matching of transition metal with magnetic moment give: {:(,"Transition Metal","Magnetic moment(B.M)"),(,(A)"Titanium (III)",(1) 4:9),(,(B)"Vandium (II)",(2) 1.73),(,(C )"Iron (II),(3)3.87):}

Answer»

A-2,B-3,C-1
A-1,B-3,C-2
A-3,B-1,C-2
C-1,B-3,C-2

Solution :`mu=sqrt(N(n+2))`,(n=no. of unpaired electrons)
(a) `mu=sqrt(n(n+2))`, (n= no. of unpaired electrons )
`Ti^(3+) to [Ar]3d^(1),mu=sqrt(1(1+2))=sqrt(3)=1.73 BM`
`V^(2+) to [Ar]3d^(3),mu=sqrt(3(3+2))=sqrt(15)=3.87 BM`
`FE^(2+) to [Ar]3d^(4),mu=sqrt(4(4+2))=sqrt(24)=4.89 BM`
Discussion
33.

Choose the correct combination of x,y, z ? Reactivity of (z) is more than (w) :

Answer»

(IV)(III)(S)
(IV)(iv)(R)
(IV)(iv)(S)
(IV)(iii)(R)

SOLUTION :
Discussion
34.

Choose the correct combination of x,y, z ?

Answer»

<P>(II)(i)(Q)
(II)(ii)(Q)
(III)(i)(P)
(II)(i)(P)

SOLUTION :
Discussion
35.

Choose the correct combination of x,y, z ?

Answer»

<P>(I)(II)(P)
(I)(ii)(Q)
(II)(i)(P)
(II)(i)(Q)

SOLUTION :
Discussion
36.

Choose the correct code regarding Roasting process. (I) It is the process of heating ore in air to obtain the oxide (II) It is an exothermic process (III) It is used for hydrated oxide and oxysalt ore (IV) It is used after the concentration of ore

Answer»

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

Answer :B
Discussion
37.

Choose the correct code regarding, possible number of geometrical isomers exhibited by following complexes: (I) [CrCl_(2)(NO_(2))_(2)(NH_(3))_(2)]^(-) (II) [Co(NO_(2))_(3)(NH_(3))_(3)] (III) [PtCl(NO_(2))(NH_(3))(py)] (IV) [PtBrCl(en)]

Answer»

(I)-4,(II)-2,(III)-3,(IV)-1
(I)-5,(II)-2,(III)-4,(IV)-0
(I)-3,(II)-2,(III)-0,(IV)-1
(I)-5,(II)-2,(III)-3,(IV)-0

Solution :
Discussion
38.

Choose the correct code for following statement. (P) In graphite inter layer spacings is more than C-C bond length within the layer. (Q) Graphite is more reactive compared to diamond. (R) Graphite is more stable compared to diamond. (S) Graphite is sufficiently inert compared to other elements.

Answer»

TTFT
TFTF
TTTT
TTFF

Answer :C
Discussion
39.

Choose the correct code in which all the molecules have dative pi bond. I - P_(4)O_(10),II - (SiH_(3))_(3) N.,III -P_(4)O_(6),IV -BF_(3)

Answer»

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

Solution :CONCEPTUAL
Discussion
40.

Choose the correct code by identifying (X), (Y) and (Z) in each case for the changes indicated: (i) CrO_(2)Cl_(2) overset(KOH) to (X) overset(conc." "H_(2)SO_(4))to(Y) overset(AgNO_(3))to(Z) (ii) CrCl_(3)(aq) underset(NaOH)overset("excess")to (X) underset(H_(2)O," boil")overset(Na_(2)O_(2))to (Y) underset("acetate")overset("lead")to (Z) (iii) ZnSO_(4)(aq) overset(Na_(2)CO_(3))to (X) overset(Delta)to (Y) underset("nitrate, "Delta)overset("cobalt")to(Z) (iv) CuCl_(2)(aq) underset(H_(2)S)overset(NH_(4)OH)to (X) underset(Delta)overset(HNO_(3))to (Y) underset("excess")overset(KCN)to(Z)

Answer»

`X=K_(2)CrO_(4)""Y=K_(2)Cr_(2)O_(7)""Z=Ag_(2)CrO_(4)`
`X=[Cr(OH)_(4)]^(-) ""Y=Na_(2)CrO_(4)""Z=PbCrO_(4)`
`X=ZnCO_(3)""Y=ZnO""Z=CoZnO_(2)`
`X=CuS""Y=Cu(NO_(3))_(2)""Z=K_(3)[Cu(CN)_(4)]`

Answer :D
Discussion
41.

Choose the correct case of hydrolysis for the following molecules : (P) CH_(3)-overset(O)overset("||")C-OCPh_(3) (Q) CH_(3)-underset(CH_(3))underset(|)CH-overset(O)overset("||")C-O-CPh_(3) (R) Ph-underset(CH_(3))underset(|)CH-overset(O)overset("||")C-O-CPh_(3) (S) CH_(3)CH_(2)-underset(CH_(3))underset(|)CH-overset(O)overset("||")C-O-CPh_(3)

Answer»

`P GT Q gt R gt S`
`P = Q = R = S`
`S gt R gt Q gt P`
`Q gt P gt S gt R`

Answer :B
Discussion
42.

Choose the correct answers for a given amount of hydrogen.

Answer»

MOLE of `H_(2)` = mole of H
Eq. of `H_(2)` = eq. of H
Mole of `H_(2)` = eq. of `H_(2)`
Mole of H = eq. of H

Answer :B::D
Discussion
43.

Choose the correct answers for a given amount of hydrogen

Answer»

MOLE of `H_(2)` = Mole of H
EQUIVALENT of `H_(2)` = Equivalent of H
Mole of `H_(2)` = Equivalent of `H_(2)`
Mole of H = Equivalent of H

SOLUTION :N/A
Discussion
44.

Choosethe correctalkyneand reagents for the preparation of

Answer»

ANSWER :B
Discussion
45.

Choose the chain terminating step (1) H_(2) rarr H^(*)+H^(*)(2) Br_(2) rarr Br^(*) + Br^(*) (3) Br^(*) + HBr rarr H^(*) + Br_(2)(4) H^(*) + Br_(2) rarr HBr + Br^(*) (5) Br^(*) + Br^(*) rarr Br_(2)

Answer»

1
3
4
5

Answer :D
Discussion
46.

Choose the compounds of maximum and minimum ionic character from LiCl, RbCl, BeCl_(2) and MgCl_(2)

Answer»

LiCl and RBCL
RbCl and `BeCl_(2)`
RbCl and `MgCl_(2)`
`MgCl_(2) and BeCl_(2)`

ANSWER :B
Discussion
47.

Choose the compound with the (S) chiral carbon and the (Z) double bond configuration

Answer»




ANSWER :D
Discussion
48.

Choose the complex entity which follow(s) EAN rule :

Answer»

`Fe(CO)_(5)`
`[MN(CO)_(5)]^(-)`
`[NI(CO)_(4)]`
all of these

Answer :D
Discussion
49.

Choose the best synthetic route to (CH_(3))_(3)COCH_(3) amongst the following: (a) React (CH_(3))_(3)COH with KOH, then add CH_(3)I . (b) React (CH_(3))_(3)COH with NaOH, then add CH_(3)I. (c) React CH_(3)OH with KOH, then add (CH_(3))_(3)CI.

Answer»

Solution :The best synthetic route to `(CH_(3))_(3)COCH_(3)` is route (a). In route (b), there is difference in the basicity of hydroxide and t-butoxide, and the CONJUGATE base of `(CH_(3))_(3)COH` is not sufficiently LARGE to affect complete deprotonation of the alcohol. When `CH_(3)I` is added to the reaction mixture, there will be two alkoxides (hydroxide and t-butoxide) competing for the reaction. In route (c), reaction of `CH_(3)O`-- (a strong base) with a tertiary alkyl HALIDE will give `E_(2)`, not `S_(N)2`, products.
Discussion
50.

Choose the best method to prepare given compound:

Answer»




SOLUTION :
Discussion