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.

Select the correct statements:

Answer»


SOLUTION :In see-saw STRUCTURE, as lone pair LIES in equatorial position, hence there is more REDUCTION is equatorial bonds than in axial bonds.
Discussion
2.

Select the correctstatement(s).

Answer»

`dG = V dp - SdT` is applicaleforall process involvingboth 'PV'and non

Solution :(A)` G = H - TS = U + PV -TS`
`dG= dU +PdV +VdP -TdS-SdT`
`=q + W + PdV + VdP -TdS - SdT`
For a reversiblepath q= TdS
If there isno non-PVwork w = - PdV
`dG = VdP - SdT `(D) `G = H -TS + U+ PV -TS`
at constant 'T' & 'P'
`dG_("SYS") =dU + PdV -TdS_("sys")= q +w_(pv) +w_("non-PV") + PdV -TdS_("sys")`
SINCE`W_(PV) = - PdV`
andin theabsence of `w_(non-PV)`
`dG_("sys") = q -TdS_("sys")`
` dG_("sys") = - T(dS_("sys") + dS_("surr"))`
Discussion
3.

Select the correct statements?

Answer»

`Cl_(2)O` and `ClO_(2)` are used as bleaching agents and germicides
`ClO_(2)` is the anhydride of `HClO_(2)`and `HClO_(3)`
`I_(2)O_(5)` is used in the quantiative ESTIMATION of CO
`Cl_(2) O_(7)` is anhydride of `HClO_(3)`

ANSWER :A::B::C
Discussion
4.

Select the correct statement(s).

Answer»

`[Co(EDTA)]^(-)` has two optical ISOMERS.
`[Co(NH_(3))_(5)(NO_(2))]^(2+)` show LINKAGE isomerism.
For `[Pt(NH_(3))BrClI(NO_(2))py]`, theoretically fifteen different geometrical isomers are possible.
`[Cr(H_(2)O)_(4)Cl_(2).2H_(2)O` is an EXAMPLE of hydrate as well as linkage isomerism.

Answer :A::B::C
Discussion
5.

Select the correct statements.

Answer»

The molecularity of an elementary reaction indicates how many reactant species TAKE part in the step.
The rate law of an elementary reaction can be predicted by simply seeing the stoichiometry of reaction.
The slowest elementary step in sequence of the reafion GOVERNS the overall rate of formation of product.
A rate law is often derived from a proposed mechanism by imposing the steady STATE approximation. Or assuming that there is a pre-equilibrium.

Answer :A::B::C::D
Discussion
6.

Select the correct statements. (1) Ferric bromide is obtained when chlorine gas is bubble through a solution of ferrous bromide (2) Sodium sulphate is obtained when SO_(2)(g) , H_(2)O(g) and air are passed over heated sodium chlorine (3) H_(2)S gas is liberated when aluminiumsuphide becomes damp.

Answer»

statements 1 and 2 are CORRECT
statement 3 ALONE is correct
statements 2 and 3 are correct
all the statements are correct

Answer :C
Discussion
7.

Select the correct statement(s) :

Answer»




This is an EXAMPLE of MICHAEL addition

Answer :C
Discussion
8.

Select the correct statement whenlower the position of a metal line in the Ellingham diagram

Answer»

The greater is the stability of it's oxide for example the line for AL (oxidation of Al) is FOUND to be below that for Fe (formation of `Fe_(2)O_(3))`
The greaterthe gap between any two lines the greater the effectiveness of reducing properties correcsponding to the lower line's METAL
The intersection of two lines implies an oxidition reduction equilibrium
At the point of intersection the free energy change for redox reaction is zero involving change for redox reaction is zero involving metal oxide and metal from that two lines.

Answer :A,B,C,D
Discussion
9.

Select the correct statement (s) - (a) The C.N. of cation occupying a tetrahedral hole is 4. (b) The C.N. of cation occupying a octahedral hole is 6. (c) In schottky defects, density of the lattice decreases. (A) a, b(B) b, c (C) a, b, c (D) a, c

Answer»

Solution : (C)
Since tetrahedral holes are surrounded by 4 NEAREST neighbours. So, the C.N. of cation occupying tetrahedral hole is 4. Since OCTAHEDRAL hole is surrounded by six nearest neighbours. So, C.N. of cation occupying octahedral is 6. In SCHOTTKY a pair of anionand cation leaves the lattice. So, density of lattice DECREASES.
Discussion
10.

Select the correct statement (s):

Answer»

Lower value of quantum number l indicates that there is a higher probability of finding the 3selectron close to the nucleus than those of 3p and 3d electrons
ENERGY of 3s orbital is LESS than for the 3p and 3d orbitals
At the node, the value of the radial FUNCTION changes sign
The radial function depends upon the quantum NUMBERS n and l

Solution :All are facts
Energy order `rarr3s lt 3p lt 3d lt 3f,"3s is CLOSER to nucleus"therefore"is most stable."`
Whereas 3f is farthest from nucleus and hence has maximum energy and is least stable.
Discussion
11.

Select the correct statement (s).

Answer»

The value of rate constatnt cannot exced the value of Arrhenius factor.
Molecularity of multiple step REACTION can be obtained from mechanism.
Half lifeof a foruth ORDER reaction is linearlydependent on INTIAL concentration of reactant
reactions with order `ge1` cannot GET COMPLETED in finitetime interval.

Answer :A::D
Discussion
12.

Select the correct statement (s) :

Answer»

`alpha`- PARTICLES are simply dipositive helium nucleus
`gamma`-rays TRAVEL with higher speed as compare to `alpha`- particle and have higher ionization POWER as compared to `beta`- particle
A LOSS of `beta`- particle results in the production of isobars
`beta`- particles are considered to be the best bombarding particles

Solution :`alpha` - particle = `He^(+2)` ion , `gamma`- ray = no charge & no Mass its speed = velocity of light
Discussion
13.

Select the correct statement regarding [Pt(CH_(3)-CH(NH_(2))COO)Cl_(2)]^(-)

Answer»

It EXHIBITS both GEOMETRICAL and OPTICAL isomerism
It exhibits only optical isomerism
It exhibits only geometrical isomerism
It has 3 STEREO isomers

Solution :
Discussion
14.

Select the correct statement regarding below figure if in this figure C_(1) has sp^(2) (S + P_(y) + P_(z)) hybridisation and C_(4) has sp (SP_(x) hybridisation. H_(2)underset(1)(C )= underset(2)(C ) = underset(3)(C ) = underset(4)(C ) = underset(5) F_(2)

Answer»

Over all molecule is planar
Nodel PLANE of `pi` - BOND of `C_(2) - C_(3)` atoms is present is
Nodel plane of `pi`- bond of `C_(3) - C_(4)` atoms is present in YZ plane
Tota nine sigma BONDS are present.

Solution :
Discussion
15.

Select the correct statement regarding salt solution of weak acid and strong base.

Answer»

Solution will be neutral
DEGREE of hyudrolysis increases with increase in dilution
shows anionic hydrolysis
Phenolphthalein is suitable INDICATOR during TITRATION of weak ACID and strong base titration

Answer :b,c,d
Discussion
16.

Select the correct statement regarding formation of micelle.

Answer»

Association formed during micelle formation, the polar head REMAINS outside TOWARDS surface.
In the association formed during micelle formation, the non-polar TAIL remains outside towards surface. 
Micelle is formed only at CONCENTRATION lower than CMC. 
Micelle always contains LESS than 100 molecules.

Solution :In the association formed during micelle formation, the non-polar tail remains outside towards surface.
Discussion
17.

Select the correct statement/reaction among following

Answer»



Compound-D is `Ph-CH_(2)-N=CH_(2)`
Compound-E is `Ph-CO OVERSET(Θ)O overset(o+)NA`

SOLUTION :N//A
Discussion
18.

Select the correct statement regarding above solution.

Answer»

Anion will UNDERGO HYDROLYSIS producing `OH^(-)` & solution is expected to be basic.
Anion will not undergo hydrolysis & solution is expected to be basic
Cation will undergo hydrolysis producting `H_(3)O^(+)` & solution is expected to be acidic.
Cation will undergo hydrolysis producing `OH^(-)` & solution is expected to be acidic.

Solution :`BH_(2)^(2+)+H_(2)OrarrBH_(2)^(+)+H_(3)O^(+)`
Discussion
19.

Select the correct statement out of the following :

Answer»

`BETA`-D(+) glucopyranose is more STABLE than `alpha`-D(+) glucopyranose
Invert sugar is laevorotatory
Although fructose is a KETONE but it gives POSITIVE Tollen's Test
Starch contains `alpha`-glycosidic linkage WHEREAS cellulose contains `beta`-glycosidic linkage

Answer :ABCD
Discussion
20.

Select the correct statement in the case of reduction of FeO at a temperature indicated by the point D-

Answer»

`DeltaG` of the overall reduction reaction INVOLVING CO is 0.
`DeltaG` of overall reduction reaction involving 1 mole of CARBON and 1 mole of OXYGEN is `+ve`
`DeltaG` of the overall reduction reaction involving 2 moles of carbon and 1 mole of oxygen is `+ve`
`DeltaG` of overall reduction reaction involving CO is `-ve.`

Answer :A
Discussion
21.

Select the correct statement from the following?

Answer»

`[Sc(H_(2)O)_(6)]^(3+) and [Ti(H_(2)O)_(6)]^(3+)` both are colourless<BR>`[Co(NH_(3))_(4)Br_(2)]CL`show IONIZATION isomers and geometrical isomers
`[PD(NO_(2))_(2)(NH_(3))_(2)]` is square planar and shows geometrical as well as linkage isomers
Both (2) and (3) are correct

Answer :D
Discussion
22.

Select the correct statement from the following :

Answer»

`[Sc(H_(2)O)_(6)]^(3+)" and "[Ti(H_(2)O)_(6)]^(3+)` both are colourless.
`Co(NH_(3))_(4)Br_(2)CL ` has ionization isomers and geometrical isomers.
`[Pd(NO_(2))_(2)(NH_(3))_(2)]` is SQUARE PLANAR and show geometrical as well as linkage isomerism.
Both (b) and (C ) are correct.

Answer :D
Discussion
23.

Select the correct statement from the fllowing

Answer»

EQULIBRIUM constant changes with ADDITION of catalyst
Catalyst increases the RATE of FORWARD reaction
The ratio of mixture at equlibrium is not changed by catalyst
Catalyst are active only in solution

ANSWER :C
Discussion
24.

Select the correct statement for Zeise's salt :

Answer»

The C=C bond is present in same plane to the `PtCl_(3)` group
C-C bond length of ethylene is higher in complex than C-C bond length of ethylene in isolated condition
The formula f Zeise's salt is `[Fe(pi-C_(5)H_(5))_(2)]`
The formula of Zeise's salt is `K[PtCl_(3)(C_(2)(CN)_(4))]`

Solution :Zeise’s salt `rarr"KIPt"Cl_(3) (C_(2)H_(4))], C_(2)H_(4)` is PERPENDICULAR to SQUARE plane of Pt-complex. Due to back bonding to `pi^(*)` of `C_(2)H_(4)` , C-C B.L.`uarr`
Discussion
25.

Select the correct statement for the complexes [Cr(H_(2)O)_(6)]Cl_(3) and [Cr(H_(2)O)_(5)Cl]Cl_(2). H_(2)O

Answer»

There can be DIFFERENTIATED by amount.
There can be diffrentiated by electrical CONDUCTING measurement method.
There can be diffrentiated by heating with CONC. `H_(2)SO_(4)`.
All of these

Answer :D
Discussion
26.

Select the correct statement for clous seeding

Answer»

It promotes rainfall
It suppress fog
Most commonlyused chemical for cloud seeding is silver iodide because it has a crystaline STRUCTURE to that of ice
It HELPS is snow fall.

Solution :Cloud seeding is a form of wheather modification, a way changing the amount or type of precipitation that FALLS from CLOUDS by dipersing chemicals into the air.
Discussion
27.

Select the correctstatement about thefollowingreaction. [(CH_(3))_(3)NCH_(2) - CH_(3)]^(+)OH^(-) to (CH_(3))_(3)N + CH_(2) = CH_(2) + H_(2)O .

Answer»

THISIS calledHofmannelimination REACTION
`OH^(-)`ionfunctionasbase
Lesssubstitutedalkeneis majorproduct
Allof THESEARE correct

Answer :D
Discussion
28.

Select the correct statementabout the following reaction CH_3-undersetunderset(CH_3)(|)CH-CH_2-CH=CH_2overset(H_2//Ni)to(Y)overset(Cl_2//hv)toMonochloro products (X)

Answer»

The reactant (X) has four positional ISOMERS ( includeing 'X' itself)
The hydrogenated product Y has three positional isomers
Four monochloro products are formed which are all positional isomers
Two alkyne can GIVEN Y on hydrogenation

Solution :`CH_3-undersetunderset(CH_3)(|)CH-CH_2-CH=CH_2overset(H_2//Ni)toCH_3-undersetunderset(CH_3)(|)CH-CH_2-CH_2-CH_2`
Positional Isomers of X : (4) `CH_3-undersetunderset(CH_3)(|)CH-CH_2-CH=CH_2,CH_3-undersetunderset(CH_3)(|)CH-CH=CH=CH_3`
`CH_3-undersetunderset(CH_3)(|)C=CH-CH_2-CH_3,CH_2-undersetunderset(CH_3)(|)C-CH_2-CH_2-CH_3`
Positional isomers of Y : (2)
`CH_3-undersetunderset(CH_3)(|)CH-CH_2-CH_2-CH_3,CH_3-CH_2-undersetunderset(CH_3)(|)CH-CH_2-CH_3`
Monochloro products : (5)
`CH_3-undersetunderset(CH_3)(|)CH-CH_2-CH_2-oversetoverset(Cl)(|)CH_2,CH_3-undersetunderset(CH_3)(|)CH-CH_2-oversetoverset(Cl)(|)CH-CH_3`
`CH_3-undersetunderset(CH_3)(|)CH-oversetoverset(Cl)(|)(CH)-CH_2-CH_3,CH_3-undersetunderset(CH_3)(|)oversetoverset(Cl)(|)C-CH_2-CH_2-CH_3,oversetoverset(Cl)(|)CH_2-undersetunderset(CH_3)(|)CH-CH_2-CH_2-CH_3`
Alkyne : (2) `CH_3-undersetunderset(CH_3)(|)CH-CH_2-C=CH,CH_3-undersetunderset(CH_3)(|)CH-C-=C-CH_3`
Discussion
29.

Selectthe correct statement about the complex [Co(NH_(3))SO_(4)]Br.

Answer»

Its ionisation isomer is `[CO(NH_(3))_(5)BR]SO_(4)`
Its gives yellow precipitate with `AgNO_(3)`.
Its ionisation isomer gives white precipitate with `BaCl_(2)`
All the above are correct statements.

Answer :D
Discussion
30.

Select the correct statement about Na_(2)S_(2)O_(3).5H_(2)O?

Answer»

It is also called as hypo
It is used in PHOTOGRAPHY to form COMPLEX with AgBr
It can be used as antichior
It is used to REMOVE stains of `I_(2)`

Solution :`Na_(2)S_(2)O_(3)` is used in the bleaching industry to destroyany excess chlorine on fabrics. Then it is used as antichlor. Iodineoxidisessodium thio sulphate to SODIUM tetrathionate
`2Na_(2)S_(2)O_(3)+I_(2) to Na_(2)S_(4)O_(6)+2NaI`
Discussion
31.

Select the correct statement about given square planar complex.

Answer»

It has no GEOMETRICAL isomer
it is optically active because it does not have PLANE of symmetry
it is optically INACTIVE because square planar complex have plane of symmetry
it is optically active because it has symmetric carbon

Solution :The complex does not contain any element of symmetry HENCE the confguration is asymmetric, THEREFORE, it is optically active.
Discussion
32.

Select the correct statement about elements of group 15^(th)

Answer»

The order of stability of oxidation state for +3 is `Bi^(3+) gt Sb^(3+) gt As^(3+)` and for `+5` is `Bi^(5+)lt Sb^(5+) lt As^(5+)`
In case of nitrogen , all oxidation state from +1 to +4 tend to disproportionate in acid solution
There is a considerable increase in COVALENT radius from N to P but from As to Bi only a small increase in covalent radius is observed
All of these

Solution :(A)This is due to the inert pair effect in the heavier p-block elements.
(B)`3HNO_2 to HNO_3+H_2O+2NO`
(C )This is due to the PRESENCE of completely FILLED d and / or f orbitals in heavier elements. Covalent radius/ pm , N=70, P=110, As=120, Sb=140, Bi=150
Discussion
33.

Select the correct statement about A and B .

Answer»

B is OPTICALLY active but `A` does not
A is optically active but `B` does not
Both `A` and `B` are optically active because of the presence of CHIRAL CENTRES
Both `A` and `B` are optically inactive because of the presence of vertical PLANE of symmetry

Solution :In a free rotation about the single bond is possible and each ring has a verticle about the single bond is possible and each ring has a verticle plane of symmetry Hence it does not show optical isomerism The diphenyl is sterically hindered because of bulky ORTHO substituents therefore phenyl ring cannot be coplanar and the energey barrier for rotation of `C'-C^(1)` o bond is very high for interconversion of enantiomers

.
Discussion
34.

Select the correct statement about [CoF_(6)]^(3-) :

Answer»

It is labile COMPLEX
It is LOW spin complex
Spin only MAGNETIC moment of complex is 3.87 B.M.
All of these

Solution :`[CoF_(6)]^(3-)` has WFL and thus, can be displaced, MAKING the complex labile.
Discussion
35.

Write equations for complete process of prepration of Na_2CO_3 :-

Answer»
Discussion
36.

Select the correct statement:

Answer»

Be and Al SHOW DIAGONAL relationship
Be forms tetrahedral complexes `[Be(C_(2)O_(4))_(2)]^(2--)`
Al forms `AlF_(6)^(2-)`, an octahedral complex
All are CORRECT statements

Answer :D
Discussion
37.

Select the correct statement -

Answer»

GEOMETRICAL isomer may differ in DIPOLE moment and visible/UV spectra.
complexes of the type `[MA_(3)B_(3)]` can also have facial (fac) and meridional (mer) isomer.
no optical isomer EXISTS for the complex trans- `[Co(en)_(2)Cl_(2)]^(+)`.
all of these.

Solution :General concept.
Discussion
38.

Select the correct statement :

Answer»

POTASSIUM ferrocyanide and potassium ferricyanide can be differentiated by measuring the solid STATE magnetic moment.
The complex `[CO(NH_(3))_(5)Br]SO_(4)" and "[Co(NH_(3))_(5)SO_(4)]Br` can be differntiated by adding aqueous solution of barium chloride .
The complex `[Co(NH_(3))Cl]Br" and "[Co(NH_(3))_(5)Br]Cl` can be differentiated by adding aqueous solution of SILVER nitrate.
All of these

Answer :D
Discussion
39.

Select the correct statement .

Answer»

Complex ion `[MoCl_(6)]^(3-)` is paramagnetic
Complex ion `[Co(en)_(3)]^(3+)` is diamagnetic
Both (a) and (b) are correct
NONE of correct

Solution :`(a) d^(3), t_(2G)^(1,1,1)EG^(0,0)`
`(b) d^(6), t_(2g)^(2,2,2)eg^(0,0)`
Discussion
40.

Select the correct set of answer: {:("ColumnI","Column - II"),("(A) Tyrosine "," (P) Essential amino acid"),("(B) Serin "," (Q) Ceric Ammonium Nitrate"),("(C) Tryptophane"," (R) Neutral "FeCl_(3)),("(D) Proline "," (S) Carbaylamine Test - Negative "):} Select the correct set of answer :

Answer»

<P> A - R, B - Q, C - P, D - S
A - Q, B - R, C - S, D - P
A - R, B - P, C - Q, D - S
A - S, B - Q, C - P, D - R

ANSWER :A
Discussion
41.

Select the correct reaction among the following :

Answer»




ANSWER :B
Discussion
42.

Select the correct relation of interaction energy of dipole-dipole force in stationary polar molecule with internuclear distance ®

Answer»

INTERACTION ENERGY `PROP 1/r`
Interaction energy `prop 1/r^2`
Interaction energy `prop 1/r^3`
Interaction energy `prop 1/r^5`

ANSWER :3
Discussion
43.

Select the correct reduction processes.

Answer»

`ZnO + H_(2) to Zn + H_(2)O`
`MgO + C^(2) to MG + CO`
`2[AG(CN)_(2)]^(-) + Zn to [Zn(CN)_(4)]^(2-) + 2Ag`
`PbO + C to Pb + Co`

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

Select thecorrect plot of radial probability function (4pir^(2)R^(2)) for 2s - orbital.

Answer»




ANSWER :B
Discussion
45.

Select the correct priority for citation as principal group:

Answer»

`-OVERSET(O)overset(||)(C)-Ohgt-overset(O)overset(||)(C)-gt-overset(O)overset(||)(C)-HGT-Ohgtgt-SH`
`-overset(O)overset(||)(C)-Ohgt- overset(O)overset(||)(C)-gt-overset(O)overset(||)(C) -Hgt-SHgt-OH`
`-overset(O)overset(||)(C)-Ohgt-overset(O)overset(||)(C)-Hgt-overset(O)overset(||)(C)-gt-SHgt-OH`
`-overset(O)overset(||)(C)-Ogt-overset(O)overset(||)(C)-Hgt- overset(O)overset(||)(C)-gt-OHgt-SH`

ANSWER :d
Discussion
46.

Select thecorrect order sequence(s).

Answer»

`C-C` bond length :
Order of dipole moment : `COgtNH_(3)`
Boiling POINT : `AsH_(3)gtNH_(3)`
Bond order of `M-O` bond (M = CENTRAL atom) : `CO_(3)^(2-)gtPO_(4)^(-3)`

Solution :(d) B.O. : `CO_(3)^(2-)=(4)/(3),PO_(4)^(3-)=(5)/(4)`
(c) B.P. : `BiH_(3)gtSbH_(3)gtNH_(3)gtAsH_(3)gtPH_(3)`
Discussion
47.

Select the correct order(s).

Answer»

`HOCl gt HOBR gt HOI`-Acid strength
`HCIO_4 lt HCIO_3 lt HCIO_2 le HCIO`-OXIDISING power
`CIO_(4)^(-) lt BrO_4^(-) lt IO_4^(-)`-oxidising power
`IO^(-) gt BrO^(-) gt CIO^(-)` -ease of disproportionation.

Answer :ABD
Discussion
48.

Select the correct order of solubility of AgCN(s) at 25^(@)C. Given that at this temperature its solubility is S_(1)(in presence of 1 M AgNO_(3)) , S_(2)(in presence of 1 M NH_(3) (aq)), S_(3)(in presence of pure water) and S_(4)(in presence of 1.5 M KCN).

Answer»

`S_(1) lt S_(2) lt S_(3) lt S_(4)`
`S_(1) lt S_(4) lt S_(2) lt S_(3)`
`S_(4) lt S_(1) lt S_(3) lt S_(2)`
`S_(3) lt S_(4) lt S_(1) lt S_(2)`

SOLUTION :Order of solubility `{:(underset(larr "COMMON ion EFFECT" rarr)(S_(4) lt S_(1)) lt underset(["Pure water"])(S_(3)) lt underset(["reactive ion effect: complex formation"])(S_(2))),((1.5M CN^(-))(1.0M Ag^(+))):}`
Discussion
49.

Select the correct order of sweetness for the given compounds. (i) Aspartem (ii) Saccarine (iii) Sucrolose (iv) Alitame

Answer»

(i) LT (i) lt (III) lt (IV)
(i) lt (iii) lt (II) lt (iv)
(iii) lt (i) lt (ii) lt (iv)
(i) lt (ii) lt (iii) lt (iv) 

ANSWER :D
Discussion
50.

Select the correct order of some important group for absolute configuration of chiral compound.

Answer»

`-SO_(3)H gt - CH_(2)OH gt - COOR gt - OCOR`
`-SO_(3)H gt - OCOR gt - COOR gt - CH_(2)OH`
`-CH_(2)OH gt - COOR gt - OCOR gt - SO_(3)H`
`-SO_(3)H gt - COOR gt - OCOR gt - CH_(2)OH`

ANSWER :B
Discussion