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 order of mobility in aqueous medium.

Answer»

`[Li(H_(2)O)_(x)]^(+)gt[LE(H_(2)O)_(y)]^(+2)`
`[Li(H_(2)O)_(x)]^(+)]lt[Be(H_(2)O)_(y)]^(+2)`
`[Li(H_(2)O)_(x)]^(+)=[Be(H_(2)O)_(y)]^(+2)`
Informations are not sufficient to predict the mobility

Solution :Mobility: `[Li(H_(2)O)_(x)]^(+)gt[Be(H_(2)O)_(y)]^(+2)`
`rarr+ve` CHARGE DENSITY increases.
`rarr` Zeft increases.
`rarr` Size of `Be^(+2)` decreaes
`rarr` Surrounding `H_(2)O` molecule increases.
`rarr` BULKY nature increaes.
`rarr` Mobility DECREASES.
2.

Select the correct order of periodic properties of species :

Answer»

`Fe^(2+) LT Fe^(3+)`: IONIC radii
`N lt O`: Second IONISATION energy
`Cu lt Zn`: Atomic radius
`In lt Tl` : First ionisation energy

Answer :B::C::D
3.

Select the correct order of electron gain enthalpy for F, CI, Br, I.

Answer»

I GT BR gt CI gt F
F gt CI gt Br gt I
F gt CI lt Br gt I
F lt CI gt Br gt I

Answer :D
4.

Select the correct order of following property .

Answer»

% s -character : `sp^(3) gt sp^(2) gt sp`
`Ohat(N)O` bond ANGLE : `NO_(3)^(-) gt OVERSET(o+)(N)O_(2)`
All angles in `CH_(2)F_(2)` are not identical
C-F bond length , `C_(4) gt CH_(3)F gt CH_(2)F_(2) gt CF_(3)H`

Answer :A
5.

Select the correct order of CFSE (Delta) for the ions given below

Answer»

`V^(2+) lt MN^(2+) lt Fe^(2+) lt CO^(2+) lt NI^(2+)`
`Ni^(2+) lt Co^(2+) lt Fe^(2+) lt Mn^(2+) lt V^(2+)`
`Mn^(2+) lt V^(2+) lt Co^(2+) lt Fe^(2+) lt Ni^(2+)`
`V^(2+) ~~ Mn^(2+) ~~ Fe^(2+) ~ Co^(2=) ~~ Ni^(2+)`

Answer :C
6.

Select the correct order of C-O bond length :

Answer»

`CO gt FE(CO)_(5)`
`[M(CO)_(4)(PF_(3))_(2)] lt [M(CO)_(5)(PF_(3))]`
`CO_(3)^(2-) lt CO`
`[V(CO)_(6)]^(-) gt [Ti(CO)_(6)]^(2-)`

Answer :B
7.

Select the correct order of acidity

Answer»

`HI GT HBr gt HCl gt HF`
`HClO_(4) gt HBrO_(4) gt HIO_(4)`
`HCIO_(3) gt HBrO_(3) gt HIO_(3)`
All are CORRECT.

ANSWER :D
8.

Select the correct order of acidity :

Answer»

`HI gt HBr gt HCl gt HF`
`HClO_(4) gt HBrO_(4) gt HIO_(4)`
`HClO lt HBrO lt HIO`
`HClO_(4) gt HClO_(3) gt HClO_(2) gt HClO`

Solution :are the correct ORDER of increasing ACIDITY.
9.

The increasing order of acidity :

Answer»

HI `gt` HBr `gt `HCl` gt ` HF
`HClO_(4) gt HIO_(4) gt HBrO_(4)`
`HClOlt HIO lt HBRO`
`HClO_(4) gt HClO_(3) gt HCLO gt HClO_(2)`

Solution :In hydrides increase ACIDIC nature and increase atomic number `: HI gt HBr gt HCl gt HF`
10.

Select the correct order of Acidic strength :-

Answer»

HF gt HCl gt HBR gt HI
`BF_3 lt BCl_3 lt BBr_3 lt Bl_3`
`P_4O_10 gt N_2O_5`
`ZnO gt B_2O_3`

ANSWER :B
11.

Select the correct order for the wavelength of absorption for the given complexes :

Answer»

`[Cr(CN)_(6)]^(3-)=[CrCl_(6)]^(3-)=[Cr(NH_(3))_(6)]^(3+)=[Cr(H_(2)O)_(6)]^(3+)`
`[CrCl_(6)]^(3-)gt[Cr(H_(2)O)_(6)]^(3+)gt[Cr(NH_(3))_(6)]^(3+)gt[Cr(CN)_(6)]^(3-)`
`[Cr(CN)_(6)]^(3-)gt[Cr(NH_(3))_(6)]^(3+)gt[Cr(H_(2)O)_(6)]^(3+)gt[CrCl_(6)]^(3-)`
`[Cr(CN)_(6)]^(3-)gt[Cr(H_(2)O)_(6)]^(3+)gt[CrCl_(6)]^(3-)gt[Cr(NH_(3))_(6)]^(3+)`

SOLUTION :`Delta_(0):CN^(-) gt NH_(3) gt H_(2)O gt Cl^(-)`
`Delta_(0) prop (1)/(lambda)`
12.

Select the correct order

Answer»

HOClgtHOBrgtHOI - 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

Solution :(C )`BrO_4^(-)gtIO_4^(-)gtCIO_4^(-)`-factual (on the basis of their SRP values.
13.

Select the correct order for the given properties - (I) Thermal stability: BaSO_(4) gt SrSO_(4) gt CaSO_(4) gt MgSO_(4) (II) Basic Nature : ZnO gt BeO gt MgO gt CaO (III) Solubility in water : LiOH gt NaOH gt KOH gt RbOH (IV) Melting point : NaCl gt KCl gt RbCl gt LiCl

Answer»

I, IV
I, II and IV
II, III
All are correct

Answer :A
14.

Select the correct order.

Answer»

Graphite = fullerene lt diamond (no. of CARBON atoms connected PER carbon atom with covalent bond only)
NaF lt KCl lt RbBr (electrical conductance in aqueous solution)
NaF lt MgO lt AlN (LATTICE energy)
`Li^(+)(G)gtMg^(2+)(g)gtBe^(2+)(g)` (hydration enegty)

Solution :B.O. in graphite and fullerene `=(4)/(3)`
while in diamond = 1
(b) Ionic mobility of `Rb^(+)gtK^(+)gtNa^(+)`
Ionic mobility of `Br^(-)gtCl^(-)gtF^(-)`
`L.E.prop(q_(+)*q_(-))/(r^(+)+r^(-))`
between charge and size, charge dominates.
15.

Select the correct order for the strength of bases given below:

Answer»

`C_2H_5^rarrNH_2^rarrC_2H_3^rarrOH^rarrC_2H^-`
`OH^rarrNH_2^rarrC_2H_3^rarrC_2H_5^rarrC_2H^-`
`C_2H^rarrC_2H_3^rarrC_2H_5^rarrNH_2^rarrOH^-`
`C_2H_5^rarrC_2H_3^rarrNH_2^rarrC_2H^rarrOH^-`

ANSWER :D
16.

Select the correct options for the following statements. 1. Cl_(2)O and ClO_(2) are used as bleaching agents. 2. OC l^(-) salts are used as detergent.. 3. OC l^(-) disproportionates in alkaline medium. 4. BrO_(3)^(-) is oxidized in acidic medium.

Answer»

1, 2, 3 correct
2, 3, 4 correct
1, 2, 4 correct
1, 3, 4 correct

Answer :A
17.

Select the correct option( s) :

Answer»

PRESSURE in container-I is 3ATM before OPENING the VALVE.
Pressure after opening the valve is 3.57 atm.
Moles in each compartmentare same after opening the valve.
Pressure in each COMPARTMENT are same after opening the valve.

Answer :A,D
18.

Select the correct options :

Answer»

Boiling point , `(P gt Q)`
Melting point, `(Q gt P)`
Water solubility, `(P lt Q)`
ACID Strength, `(Q lt P)`

ANSWER :B::C
19.

Select the correct option :- The Grand Alliance of opposition of 1971

Answer»

Got a combined tally of seats that was LESS than 40.
Had a clear IDEOLOGICAL programme.
Had a grand finish in the 1970 elections.
Proved to be a grand success.

Answer :A
20.

Select the correct option for the leader and the country that helped to reach the Tashkent agreement between India and Pakistan :

Answer»

INDIA, Nehru
USSR, Kosygin
Egypt, Nasser
Indonesia, Sukarno

Answer :B
21.

Select the correct option for the given processes. (P) Process of heating stell to redness and then cooling it very slowly. (Q) Process of heating steel in presence of NH_(3) and producing hard coasting of iron nitrate on the surface of steel. (R ) Process of heating steel to redness and then cooling it suddenly by plunging it into water or oil. (S) Process of heating quencheed steel toa temperature well below redness and then cooling it slowly.

Answer»

TEMPERING , Nitriding, Annealing and Quenching RESPECTIVELY
Quenching,Nitriding, Annealing and case HARDENING respectively
Tempering , Case hardening ,Quenching Annealing respectively
Annealing ,Nitriding,Quenching ,and Quenching Tempering respectively

Answer :D
22.

Select the correct option regarding above paragraph:

Answer»

A is good absrobent of carbondioxide.
Aqueous SOLUTION of compound 'C' on reaction with carbodioxide form compound.
Central atom of compound 'E' has +3 OXIDATION STATE.
Compound 'B' cannot EXIST with sodiumbicarbonate in solution.

Solution :`A=Ca(OH)_(2) B=NaOH C=CaCO_(3)`
`D=Al E=Naoverset(+3)AIO_(2)`
23.

Select the correct option among following at 298 K temperature

Answer»

In neutral AQ. SOLUTION, `{[H^+] = SQRT(K_w)}`
In acidic aq. solution, `{[H^+] lt sqrt(K_w)}`
In BASIC aq. solution, `{[H^+] gt sqrt(K_w)}`
In basic aq. solution, PH lt pOH

Answer :1
24.

Select the correct option.

Answer»

`Delta H_(F) [H (g)]` is EQUAL to `Delta H_("atomisaation")` of `H_(2) (g)`
`Delta H_(BE) (H - H)` is equal to `Delta H_(f)` of
`DeltaH_(BE) (H - H)` is equal to `DeltaH_("ATOMISATION")` of `H_(2) (g)`
`Delta H_("comustion") [H_(2) (g)]` is equal to `Delta H_(f) [H_(2) (g)]`

ANSWER :C
25.

Select the correct option ?

Answer»


SOLUTION :N//A
26.

Select the correct option :

Answer»

`(A)` is `SiF_(4)`
`(B)` is `H_(2)SiF_(6)`
`( C)` is `H_(4)SiO_(4)`
All of these

Solution :
27.

Select the correct option :

Answer»

Isoelectric point is the pH at which an amino acid exists PRIMARILY in its neutral form.
Isoelectric point is the average of `pk_(a)` values of `alpha`-COOH amino `alpha-NH_(3)^(+)`groups [valid only for neutral aminonacid]
Glycine is CHARACTERISED by two `pK_(a)` values.
For neutral amino acid the concentration of of zwitter ion is MAXIMUM at its isoelectric point.

Solution :N//A
28.

Select the correct match here

Answer»

`[Co(o x)(H_2O)(NH_3)]Br` OPTICAL ISOMERISM
`[Cr(SCN)(H_2O)_(3)(en)](C_2O_4)` Ionization isomerism
`[ZnBr(CN)(SCN)(NH_3)]^(-)`
`[CoBrCl(H_2O)_(4)][AG(CN)_(2)]`

Answer :D
29.

Select the correct Lewis dot representation.

Answer»




ANSWER :A::B::C
30.

Select the correct graph for given property for chalcogen family -

Answer»




SOLUTION :EA order S gt SE gt TE gt O
31.

Select the correct limitations of III law of thermodynamics:

Answer»

Glassy SOLIDS at zero KELVIN has entropy greater than zero
Solids having mixture of ISOTOPES do not have entropy zero at Kelvin
Crystals of CO,`N_2O`,NO, H_2O,` etc., do not have zero entropy at zero Kelvin.
All

Answer :D
32.

Select the correct IUPAC name from the following.

Answer»

`H[AuCl_(4)]` : Hydrogen tetrachloridoaurate(III)
`[PtCl_(6)]^(2-)` : Hexachloridopaltinate(IV) ion
`[Cu(NH_(3))_(4)]SO_(4)` : Tetraaminecopper(II) sulphate
`[Cr(EN)_(3)]Cl_(3)` : Tris (ethylenediamine)CHROMIUM(III) chloride

Solution :(a) Tetrachloridoauric (III) acid is the correct IUPAC name.
33.

Select the correct group(s) of reagent(s) used in the following conversions:

Answer»

a.`I implies DIL. HNO_(3)`, `II implies Na_(2)Cr_(2)O_(7)//H_(2)SO_(4)`
`III implies KMnO_(4)//NaOH`, `IV implies PbO_(4)//overset(ɵ)(O)H, H_(3)O^(o+)`
b.`I implies dil. HNO_(3), II implies KMnO_(4)//H^(o+)`
`III implies KMnO_(4)//NaOH`,
`IV implies TsCl+ acidic KMnO_(4)+H_(2)O`
c.`I implies KMnO_(4)//NaOH, II implies Na_(2)Cr_(2)O_(7)//H^(o+)`,
`III implies KMnO_(4)//overset(ɵ)(O)H, IV implies dil. HNO_(3)`
d.`I implies CrO_(3)//MeCOOH, II implies KMnO_(4)//overset(ɵ)(O)H`,
`III implies KMnO_(4)//H^(o+), IV implies dil. HNO_(3)`

Solution :(I) `implies` Dilute `HNO_(3)` oxidies only one `(Me-)` group tp `(-COOH)` group.
(II) `implies` EWG, e.g., `(-NO_(2))` group makes the benzene ring stable, so either acidic `KMnO_(4)` or acidic `K_(2)Cr_(2)O_(7)` can be used to oxidise the `(Me-)` group to `(-COOH)` group.
III `implies (-I)` effect of `Cl` makes the benxene ring stable, so oxidising agent such as ALKALINE `KMnO_(4)` or acidic `K_(2)Cr_(2)O_(7)` can be used to oxidise the `(Me-)` group to `(COOH)`.
IV `implies EDG (+R)` effect of `(-OH)` group makes the benzene ring unstable, so either `(-OH)` has to be PROTECTED by tosylation using `TsCl` and then oxidation of `(Me-)` group to `(-COOH)` group by acidic `KMnO_(4)` is carried out FOLLOWED by hydrolysis or by using a very mild O.A. such as `PbO_(2)//overset()(O)H, H_(3)O^(o+)`. So the answers are `(a)` and `(b)`.
34.

Select the correct expression regarding the relation between K_(P) and K_(C) for the reaction aX_((g))+bY_((g))hArrbZ_((g))+aW_((g))-

Answer»

<P>`K_(p)=K_(C)(RT)^(a+b)`
`K_(p)=(K_(C))/((a+b)^(2))`
`K_(p)=K_(C)RT`
`K_(p)=K_(C)`

ANSWER :D
35.

Select the correct curve(s) : If v = velocity of electron in Bohr’s orbit. r = Radius of electron in Bohr’s orbit. P.E. = Potential energy of electron in Bohr’s orbit. K.E. = Kinetic energy of electron in Bohr’s orbit.

Answer»




ANSWER :B::C::D
36.

Select the correct code regarding total number of space isomers for the following compounds: (I) [Ma_(3)b_(2)c]^(n+-) (II) [M(AB)_(3)]^(n+-) (III) [Ma_(2)b_(2)c_(2)]^(n+-)

Answer»

(I)-4,(II)-4,(III)-6
(I)-4,(II)-3,(III)-5
(I)-3,(II)-3,(III)-5
(I)-3,(II)-4,(III)-6

Solution :
`IMPLIES`All are OPTICALLY inactive, No. of stereoisomers=3

`implies ` Both are optically active, No of stereoisomers=4
(III)
`implies `No. of stereoisomers=6
37.

Select the correct combination of reactions.

Answer»

`CH_(3)-OVERSET(O)overset(||)C-CH_(3) underset(HCl)overset(Zn-Hg)to`, Wolf-Kishner reduction
`CH_(3)-overset(O)overset(||)C-C_(2)H_(5) underset(KOH // "ETHYLENE GLYCOL" // Delta)overset(NH_(2)NH_(2))to`, Clemmensen reduction
`CH_(3)-overset(O)overset(||)C-Cl underset(Pd-BaSO_(4))overset(H_(2))to`, Rosenmund reduction
`CH_(3)-CN underset(HCl // H_(3)overset(+)O)overset(SnCl_(2))to`, Stephen reaction

Solution :`CH_(3)-overset(O)overset(||)C-Cl underset(Pd-BaSO_(4))overset(H_(2))to`, Rosenmund reduction and `CH_(3)-CN underset(HCl // H_(3)overset(+)O)overset(SnCl_(2))to`, Stephen reaction
38.

Select the correct code about complex [Cr(NO_(2))(NH_(3))_(5)][ZnCl_(4)]: (I) IUPAC anem of compound is pentaamminenitrito-N-chromium (III) tetrachlorozincate (II) (II) it shows geometrical isomerism (III) It shows linkage isomerism (IV) it shows coordination isomerism

Answer»

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

Solution :(I) IUPAC name is Pentaamminetrito-N-chromium(III) tetrachlorozincate
(II) It does not exhibit geometrical isomerism.
(III) it SHOW linkage isomerism due to presence of AMBIDENTATE ligand `NO_(2)^(-)`
(IV) its coordination ISOMERS are:
`[CrCl(NH_(3))_(5)][ZnCl_(3)(NO_(2))],[CrCl_(2)(NH_(3))_(4)][ZnCl_(2)(NO_(2))NH_(3)]`
`[Zn(NO_(2))(NH_(3))_(3)][CrCl_(4)(NH_(3))_(2)]`
39.

Select the correct combination.

Answer»

(I)(ii)(Q)
(IV)(ii)(S)
(I)(III)(S)
(I)(iv)(R)

Solution :NA
40.

Select the correct code of TRUE and FALSE for given statements: (a) Peroxide ion as well as dioxygen molecule both are paramagnetic species (b) In set of isomers, [Cr(H_(2)O)_(6)]Cl_(3) and [CrCl(H_(2)O)_(5)]Cl_(2)*H_(2)O, both compounds can easily loose water molecule on treatment with conc. H_(2)SO_(4) (c) During transformation NO to NO^(+), bond length and magnetic behaviour decreases (d) An ether is more volatile than alcohol both having same molecular formula

Answer»

FFTT
FTFT
FTTT
TFFT

Solution :Peroxide ion is diamagnetic while dioxiygen is PARAMAGNETIC.
Conc. `H_(2)SO_(4)` can DEHYDRATE water of crystallization from `[CRCL(H_(2)O)_(5)]Cl_(2)*H_(2)O` but it can not remove those water molecules which are working as ligands.
41.

Select the compounds where iron is in +2 oxidation state,

Answer»

`K_(3)[Fe(CN)_(6))]`
`K_(4) [Fe(CN)_(6)]`
`Na_(2)[Fe(CN)_(5)NO]`
`[Fe(OH)_(2)]^(+)`

ANSWER :B::C
42.

select correct absorption isobars for chemisoption and physisoption respectivly ,(where x/m= extent of adsorption , T = temperature )

Answer»




ANSWER :C
43.

Select the compound which on treatment with nitrous acid liberates nitrogen.

Answer»

Nitroethane
Triethylamine
Diethylamine
Ethylamine

SOLUTION :`1^(@)`/ primary amines `overset("Nitrous acid")to Nitrogen uarr`
`C_(2)H_(5)NH_(2) + HO-N = O overset("COLD") to C_(2)H_(5) OH + H_(2)O + N_(2) uarr`
44.

Select the compounds having metal in zero oxidation state

Answer»

`Ni(CO)_4`
`Cr(CO)_6`
`Fe_(2)(CO)_9`
`CO(CO)_6`

Solution :METAL carbonyles with NEUTRAL charge `rArr` Metal has .o. oxidation state
45.

Select the compound in which the oxidation number of oxygen is –1:-

Answer»

`HClO_(4)`
`O_(2)F_(2)`
`KO_(2)`
`BaO_(2)`

ANSWER :D
46.

Select the compound in which chlorine shows highest oxidation state :

Answer»

`HClO_(4)`
`HClO_(3)`
`HClO_(2)`
`HCLO`

ANSWER :A
47.

Select the compound from the following which can undergo S_(N)2, but cannot undergo( or gives minor product), elimination on heating with CH_(3)O^(-).

Answer»

2-bromo-3-methylpentane<BR>1-bromo-2,3-dimethylbutane
1-bromo-2,2-dimethylbutane
3-bromo-2-methylpentane.

Solution :`CH_(3)-underset(CH_(3))underset("|")(CH)-underset(CH_(3))underset("|")(CH)-CH_(2)Br`
(primary alkyl halide has more tendency to undergo SUBSTITUTION)
`underset(""CH_(3))underset("|")overset(""CH_(3))overset("|")(CH_(3)-CH_(2)-C-CH_(2)Br`
( primary alkyl halide without `alpha`-hydrogen )
48.

Select the compound from the following which dissolves in water

Answer»

`C Cl_(4)`
`CS_(2)`
`CHCl_(3)`
`C_(2)H_(5)OH`

SOLUTION :`C_(2)H_(5)OH` will DISSOLVE in water BECAUE it forms hydrogen BOND with water molecule.
49.

Select the complex which show both structural and stereo isomerism :

Answer»

`[Pt(NH_(3))_(4)Cl_(2)]l`
`[Pt(NH_(3))_(5)CL]Br_(3)`
`[Pt(en)_(2)Cl_(2)]Br_(2)`
`[Pt(NH_(3))_(2)(Cl)(Br)]`

SOLUTION :Compound in option (c ) have ionisation isomerism and STEREOISOMERISM.
50.

Select the non-buffer solution-

Answer»

`0.8(M)H_2S+0.8(M)KHS`
`2(M)C_6H_5NH_2+2(M)C_6H_5N^(+)H_3barBr`
`3(M)H_2CO_3+2(M)KHCO_3`
`0.05(M)KClO_4+0.05(M)HClO_4`

Answer :A::B::C