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 reaction saytzeff alkene is major product.

Answer»


`CH_3- CH_2 - CH_2 - undersetoverset(|)(F)(C )H - CH_3 underset(DELTA)overset(ETO^(-))(to)`

SOLUTION :
bulk base (or) substracts bulky (or) bad leaving groups contains Halfmanns elimination is major
Discussion
2.

In which of the following both are nonpolar -

Answer»

`XeF_(4),O_(3)`
`XeF_(5)^(-),I_(2)Cl_(6)`
`SF_(4),XeF_(2)`
`BrF_(3),SCl_(2)`

ANSWER :A
Discussion
3.

In which of the following C-X bond has highest bond dissociation enthalpy

Answer»

`CH_2 = CH - CL`
`CH_2 = CH - CH_2Cl`
`CH_3-CH_2-CH_2-Cl`
`CH_2= CH-CH_2-Br`

SOLUTION :Due to +M EFFECT C-Cl bond in vinyl chloride is having double bond character hence has HIGHEST bond dissociation energy
Discussion
4.

In which of the following reaction, the equilibrium is shifted to the right by increasing temperature ?

Answer»

`N_(2)(g)+3H_(2)(g)HARR 2NH_(3)(g), DELTA H =-ve`
`CaCl_(2)(s)+aq hArr CaCl_(2)(aq)+`HEAT
`2NO(g)-`Heat `hArr N_(2)(g)+O_(2)(g)`
`NH_(4)Cl(s)+H_(2)O hArr NH_(4)+(aq)+Cl^(-)(aq)`.

Answer :D
Discussion
5.

In which of the following bond angle order between bonds around underlined atom is CORRECT

Answer»

`UL(O)Cl_(2) lt H_(2)ul(O)`
`ul(N)H_(3) gt ul(P)H_(3)`
`ul(N)(CH_(3))_(3) gt ul(N)(SiH_(3))_(3)`
`ul(O)Cl_(2)lt ul(S)Cl_(2)`

Answer :A
Discussion
6.

In which of the following reaction, regioselectivity can be observed .

Answer»

`CH_(3)-underset(H)underset(|)overset(CH_(3))overset(|)C-CH_(2) -CI overset(alc.KOH//DELTA)RARR`
`CH_(3)-underset(CI)underset(|)overset(CH_(3))overset(|)C-CH_(3)overset(alc.KOH//Delta)rarr`
`CH_(3)-underset(CI)underset(|)overset(CH_(3))overset(|)C-CH_(2) -CH_(3)overset(alc.KOH//Delta)rarr`
`CH_(3)-underset(CH_(3))underset(|)overset(CH_(3))overset(|)C-CH_(2) -CI overset(alc.KOH//Delta)rarr`

Solution :`CH_(3) underset(CI)underset(|)overset(CH_(3))overset(|)C -CH_(2) -CH_(3) overset("alcoholic KOH"//Delta)rarr`
`CH_(3) -CH=underset(CH_(3))underset(|)(C) - CH_(3) + H_(2)C=CH-CH_(2) -CH_(3)` .
Discussion
7.

In which of the following reaction, reactants and products are correctly matched?

Answer»




ANSWER :a,B,C
Discussion
8.

In which of the following bond angles on sp^3- hybridised are not contracted due to lone pair of electron :

Answer»

`OF_2`
`H_2O`
`CH_3OCH_3`
`CH_3OH`

ANSWER :C
Discussion
9.

In which of the following bond angle is maximum?

Answer»

`NH_3`
`NH_4^+`
`PCl_3`
`SCl_2`

ANSWER :B
Discussion
10.

In which of the following reaction product obtained has less number of carbon atom than reactants? 1. acid hydrolysis of alpha-nitroalkene2.oxidation of aldehydes 3.oxidation of ketones 4. oxidation of 3^(@) alkyl amine

Answer»

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

Answer :D
Discussion
11.

In which of the following bond angle changes around 'O' due to back bonding

Answer»

`B(OH)_(3)`
`B(O Me)_(3)`
`O Cl_(2)`
`O(CH_(3))_(2)`

Answer :A
Discussion
12.

In which of the following reaction, product are not correctly matched ?

Answer»

`underset((aq.))(HNO_(3)) +P_(4)O_(10(s)) to N_(2)O_(3)`
`NH_(4)Cl OVERSET(DELTA)to NH_(3) +HCl`
`Ca_(3)P_(2) +6H_(2)Oto 2PH_(3) +3Ca (OH)_(2)`
`NH_(4)Cl_((aq))+NaNO_(2(aq.)) overset(Delta)to N_(2)`

Answer :A
Discussion
13.

In which of the following bond angle can not be explained by Valence Bond Theory?

Answer»

`H_(2)O`
`H_(2)PO`
`H_(2)S`
`H_(2) TE`

ANSWER :A
Discussion
14.

In which of the following reaction product is t-butyl methyl ether

Answer»

`C_2H_5-OH+C_2H_5-OH overset("CONC." H_2SO_4)to `
`(CH_3)_3C-Br + CH_3O Na to`
`CH_3-Br + (CH_3)_3C-O Na to`
`(CH_3)_3C-Br + CH_3 - OH to `

ANSWER :C
Discussion
15.

In which of the following Bleaching powder is not used

Answer»

For BLEACHING paper pulp
For WATER STERILISATION
For MAKING chloroform
For SUGAR decolourisation

Answer :D
Discussion
16.

In which of the following reaction, pressure has no effect on equilibrium ?

Answer»

`N_(2)O_(4)(G)hArr 2NO_(2)(g)`
`2SO_(2)(g)+O_(2)(g)hArr 2SO_(3)(g)`
`CO_(2)(g)+H_(2)(g)hArr CO(g)+H_(2)O(g)`
`N_(2)(g)+3H_(2)(g)hArr 2NH_(3)(g)`

Answer :C
Discussion
17.

In which of the following atom possesses highest oxidation state?

Answer»

`(n-1) d^(3)NS^(2)`
`(n-1) d^(5) ns^(2)`
`(n-1) d^(8) ns^(2)`
`(n-1) d^(5) ns^(2)`

Answer :D
Discussion
18.

In which of the following reaction, phenol or sodium phenoxide is NOT formed ?

Answer»

`C_6H_5SO_3Na + 2NAOH underset(573K) overset("fused")to`
`C_6H_5ONa+H_2SO_4 to `
`C_6H_5Cl+H_2O underset(698K) overset(Ca_3(PO_4)_2) to `
`C_6H_5N NCL underset(KCL)overset(CUCL)to`

Answer :D
Discussion
19.

In which of the following reaction phthalic acid can be formed ?

Answer»




ANSWER :B::C::D
Discussion
20.

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

Answer»

Increasing size: `AL^(3+) lt Mg^(2+) lt Na^(+) lt F^(-)`
Increasing I.`E_(1)`: `B lt C lt N lt O`
Increasing `E.A_(1):I lt Br lt F lt CL`
Increasing METALLIC radius : `Li lt Na lt K lt Rb`

ANSWER :B
Discussion
21.

In which of the following reaction, number of carbon stoms in parent chain of reactants are same as number of carbon atoms of parant chain in product ?

Answer»




SOLUTION :(B)
Discussion
22.

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

Answer»

`HF lt HCl lt HBr lt HI` : increasing acid 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 :Increasing `pK_(a)` values means decreasing acidity but the given sequence represents increasing acidity. Thus, option (b) is incorrect.
Discussion
23.

In which of the following reaction oxidation of iron is not possible ?

Answer»

Recation in which rusting of iron plates.
Removal of colour of `CuSO_(4)` SOLUTION by iron
Liberation of `H_(2)` gas from water vapour by iron at high temperature.
Production of `Fe(CO)_(5)` from Fe.

Solution :Oxidation state `underset(0)underset(darr)(Fe)+5CO to underset(0)underset(UARR)(Fe)(CO)_(5)`
In this reaction oxidation state of iron does not CHANGE but it remain constant.
So oxidation of Fe does not possible.
In all rest OPTIONS, Fe(0) get converted into `Fe^(2+)`. i.e., oxidation of Fe into `Fe^(2+)` occurs.
Discussion
24.

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

Answer»

`HFltHClltHBrltHI`:increasing acidic STRENGTH
`H_(2)OltH_(2)SltH_(2)SeltH_(2)Te`:increasing `pK_(a)` values
`NH_(3)ltPH_(3)ltAsH_(3)ltSbH_(3)`:increasing REDUCING character
`CO_(2)ltSiO_(2)ltSnO_(2)ltPbO_(2)` : increasing oxidising power

Answer :B
Discussion
25.

In which of the following reaction, phenol or sodium phenoxide is not formed

Answer»

`C_(6)H_(5)N_(2)Cl+` alco. `KOH to `
`C_(6)H_(5)Ocl + NAOH to `
`C_(6)H_(5)N_(2)Cl + ` AQ. `NaOH to `
`C_(6)H_(5)N``NCl underset(Delta)overset(H_(2)O)to `

Answer :B
Discussion
26.

In which of the following arrangement, the order is/are according to the property indicated against it ?

Answer»

Decreasing boiling point : `SbH_3 gt NH_3 gt AsH_3 gt PH_3`
Decreasing paramagnetic character : `Fe^(3+)gtMn^(3+)gtCr^(3+)GTV^(3+)`
Decreasing mobility of IONS in water : `Cs^(+)gt Rb^(+)gtK^(+)Na^(+)`
Decreasing bond energy :`N_2gtN_2^(+)gtN_2^(-)gtN_2^(2-)`

Solution :(A)`SbH_3` has highest boiling point on account of highest magnitude of vander Waals force of attraction due to highest molecular mass. Next is of `NH_3` due to strong H-bonding.
(B)Number of unpaired electron are 5,4,3 & 2 respectively.
Paramagnetic character `prop` Number of unpaired electrons.
( C)Degree of hydration `prop 1/("SIZE of CATION ")` Bigger hydrated ion moves slowly.
(D)Bond order is directly proportional to the bond energy.
Bond order of `N_2 =3, N_2^(+)=2.5, N_2^(2-)=2`
But `N_2^-` has more electrons in antibonding MO's and thus `N_2^+` is more stable than `N_2^-`.
Discussion
27.

In which of the following reaction N_(2) is not obtained?

Answer»

`NH_(4)Cl +NaNO_(2) overset(DELTA)to `
`NH_(4)Cl+NaNO_(3) overset(Delta)to`
`(NH_(4))_(2)Cr_(2)O_(7) overset(Delta)to`
`Ba(N_(3))_(2) overset(Delta)to `

ANSWER :2
Discussion
28.

In which of the following aqueous solutions H_(2) and O_(2) are not liberated at cathode and anode respectively on electrolysis using inert electrodes?

Answer»

`H_(2)SO_(4)` solutions
NaOH solution
`Na_(2)SO_(4)` solution
`AgNO_(3)` solution

Solution :Read TEXT for preferential discharge of IONS
Discussion
29.

In which of the following reaction K_(p)gtK_(c)

Answer»

`N_(2)+3H_(2)hArr2NH_(3)`
`H_(2)+I_(2)hArr2HI`
`PCL+)_(3)+Cl_(2)hArrPCl_(5)`
`2SO_(3)hArrO_(2)+2SO_(2)`

Solution :For reaction `2SO_(3)hArrO_(2)+2SO_(2) Deltanis +ve so K_(p)` is more than`K_(c).`
By `K_(p) =K_(c)(RT)^(DELTAN)`
Discussion
30.

In which of the following aqueous solutions, the degree of dissociation of water is maximum?

Answer»

`NH_(4)CL` solution
`CH_(3)COONA` solution
`CH_(3)COONH_(4)` solution
Same in all

Answer :C
Discussion
31.

In which of the following reaction K_p and K_c are equal :

Answer»

`N_2(G) + 3H_2(g) HARR 2NH_3(g)`
`2SO_2(g) + O_2(g) hArr 2SO_3(g)`
`N_2(g)+ O_2(g) hArr 2NO(g)`
`2NO(g) + O_2(g)hArr 2NO_2(g)`

ANSWER :C
Discussion
32.

In which of the following amines , the first has lower pk_(b) value than the second

Answer»

ANILINE, m-nitroaniline
m- TOLUIDINE, p-toludine
aniline, p-chloraniline
aniline, p-aminophenol

Answer :A::C
Discussion
33.

In which of the following reaction is DeltaS positive ?

Answer»

`H_(2)O(l) to H_(2)O(s)`
`3O_(2)(g) to 2O_(3)(g)`
`H_(2)O(l) to H_(2)O(g)`
`N_(2)(g)+3H_(2)(g) to 2NH_(3)(g)`

ANSWER :C
Discussion
34.

In which of the following amines, intermolecular hydrogen bond does not exist

Answer»




`CH_(3)CH_(2)CH_(2)-NH_(2)`

Solution :Hydrogen and most electro negetive ATOM
Discussion
35.

In which of the following reaction is benzoic acid the major product ?

Answer»

`C_(6)H_(5)CH_(2)OHoverset(1.KMnO_(4).oversetΘOH)underset(2.H_(3)O^(OPLUS))RARR`
`C_(6)H_(5)-overset(O)overset("||")C-CH_(3)overset(Cl_(2)+NaOH)underset(H_(3)^(oplus)O)rarr`
`C_(6)H_(5)MgBroverset(CO_(2))underset(H_(3)^(oplus)O)rarr`
`C_(6)H_(5)CH_(3)overset(KMnO_(4),oversetΘOH)underset(H_(3)^(oplus)O)rarr`

ANSWER :A::B::C::D
Discussion
36.

In which of the following all electronic effects namely inductive, mesomeric and hyperconjugative effects are present?

Answer»




ANSWER :D
Discussion
37.

In which of the following all are disaccharides?

Answer»

MALTOSE, SUCROSE, LACTOSE
Maltose,Lactose,Glucose
Glycogen, Lactose, Sucrose
STARCH, Maltose, Lactose

Answer :A
Discussion
38.

In which of the following reaction H_2O_2 acts as reducing agent :

Answer»

`FeCl_3+ 2HCL + H_2O_2 to FeCl_3 + 2H_2O`
`Cl_2 + H_2O_2 to 2HCl + O_2`
`2HI + H_2O_2 to 2H_2O + I_2`
`H_2SO_3 + H_2O_2 to H_2SO_4 + H_2O`

Solution :`{:(Cl_2,to,HCl),(DARR,,darr),(0,,-1):}`
Discussion
39.

In which of the following reaction formation of racemic mixture.

Answer»




ANSWER :C
Discussion
40.

In which of the following acid, the maximum number of hydrogen atoms are joined directly with phosphorous ?

Answer»

PHOSPHOROUS ACID
Phosphonic acid
Pyro PHOSPHORIC acid
Phosphoric acid

Solution :
Discussion
41.

In which of the following reaction H_(2)O_(2) is acting as a reducing agent

Answer»

a,b
c,d
a,c
b,d

Solution :The reducing agent itself gets oxidised
Discussion
42.

In which of the following, addition of HBr does not takes place against markownikoff's rule or Anti-Markownikoff addition of HBr is not observed for

Answer»

Propene
But-1-ene
But-2-ene
Pent-2-ene

Solution :`CH_3-CH=CH-CH_3+HBr to UNDERSET"2-bromobutan"(CH_3-CH_2-underset(Br)underset(|)CH-CH_3)`
Anti-Markownikoff's RULE is not APPLICABLE of symmetrical alkenes
Discussion
43.

In which of the following reaction deuterium exchange is not observed ?

Answer»

`CH_(3)-UNDERSET(O)underset(||)(C)-CH_(2)-CH_(3) overset(D_(2)O //overset(Theta)(O)H)underset("excess")toCD_(3)underset(O)underset(||)(C)-CD_(2)-CH_(3)`
`CH_(3)-underset(Ph)underset(|)(C)H-underset(O)underset(||)(C)-H overset(D_(2)O //overset(Theta)(O)H)toCH_(3)-underset(Ph)underset(|)(CD)-underset(O)underset(||)(C)-H`

`H-underset(O)underset(||)(C)-H overset(D_(2)O //overset(Theta)(O)H)toD-underset(O)underset(||)(C)-D`

ANSWER :D
Discussion
44.

Inwhichof the following1^(st)is more basicis 2^(nd)

Answer»




SOLUTION : Aliphaticaminesare morebasicthan AROMATICAMINES .
Discussion
45.

In which of the following reaction cyanide will be obtained as a major product ?

Answer»

`Ph-overset(O)overset("||")("C")-CH_(3)overset((i) LiAlH_(4))underset((ii) H_(3)O^(+))rarr`
`Ph-overset(O)overset("||")("C")-NH_(3)overset(NAOH)underset(Br_(2))rarr`
`Ph-overset(O)overset("||")("C")-NH_(3)overset(P_(4)O_(10))rarr`
`Ph-overset(O)overset("||")("C")-O-H overset(SOCl_(2))rarr overset(NH_(3))rarr`

Answer :C
Discussion
46.

In which of the following 10ns has the metal atom EAN as 36:

Answer»

`[FE(CN)_6]^(4-)`
`[Fe(CN)_6]^(3-)`
`[PdCl_4]^(2-)`
`[PD(CN)_6]^(2-)`

Answer :A
Discussion
47.

In which of the following reaction carbocation not formed ?

Answer»




ANSWER :B
Discussion
48.

In which of the following reaction an optically active product is formed?

Answer»

`CH_(3)ONa++C_(2)CH_(5)CL to `


Answer :C
Discussion
49.

In which of the compounds the oxidation state of hydrogen is -1?

Answer»

`H_2O`
`CaH_2`
`HBR`
`H_2S`

ANSWER :B
Discussion
50.

In which of the following reactins heterogenous catalysis is involved ? (i) 2SO_(2) (g) + O_(2) (g) overset(NO (g))to2SO_(3) (g) (ii) 2SO_(2) (g) overset(P (s)) to 2SO_(3) (g) (iii) N _(2)(g) + 3H_(2) (g) overset(Fe (s))to 2NH_(3) (g) (iv) CH_(3) COOCH_(3) (l) + H _(2) O (l) overset(HCl(l))to CH_(3) COOH (aq) + CH_(3) OH (aq)

Answer»

`(II),(III)`
`(ii), (iii),(IV)`
`(i),(ii),(iii)`
`(iv)`

ANSWER :A
Discussion