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.

Give the IUPAC names of : (i) CH_(3)-underset(OCH_(3))underset(|)(CH)-underset(O)underset(||)(C)-underset(CH_(3))underset(|)(CH)-OCH_(2)CH_(3) (ii) CH_(3)-CO-underset(C_(2)H_(3))underset(|)(CH)-CH_(2)-CH_(2)-Cl

Answer»

SOLUTION :(i) 2-ethoxy-4-methoxy-3-pentanone
(II) 3-ethyl-5-chloro-2-pentanone.
Discussion
2.

Given P-x curve for a non ideal liquid mixture (fig.) Identify the correct T-x curve for the same mixture.

Answer»




ANSWER :B
Discussion
3.

Given one test of differentiate [Co(NH_(3))_(5)Cl]SO_(4) and [Co(NH_(3))_(5)SO_(4)]Cl.

Answer»

Solution :`(a) [Co(NH_(3))_(5)Cl]SO_(4) to [Co(NH_(3))_(5)Cl]^(+2)+SO_(4)^(2-)`
`(b) [Co(NH_(3))_(5)SO_(4)]Cl to [Co(NH_(3))_(5)SO_(4)]^(-)+Cl^(-)`
`(i)` Aqueous solution of `(a)` gives sulphate ion. When an addition of `BaCl_(2)` solution `(a)` gives WHITE precipitate of `BaSO_(4)` . But `(b)` does not give any precipitate.
`(ii)` Aqueous solution of `(b)` gives chloride ion. When an addition of `AgNO_(3)` solution `(b)` gives curdy white precipitate of `AGCL`. But `(a)` does not give any precipitate.
Discussion
4.

Give the IUPAC names of: (i) Diacetone alcohol (ii) Crotonaldehyde.

Answer»

SOLUTION :(i) 4-Hydroxy-4-methylpentan-2-one (II) But-2-en-1-al.
Discussion
5.

Give the IUPAC names of (i) CH_(3)-underset(OCH_(3))underset(|)(CH)-underset(O)underset(|)(C)-underset(CH_(3))underset(|)(CH)-OCH_(2)CH_(3) (ii) CH_(3)-CO-underset(C_(2)H_(5))underset(|)(CH)-CH_(2)-CH_(2)-Cl

Answer»

SOLUTION :(i) 2-ethoxy-4-methoxy-3-pentanone
(II) 3-ethyl-5-chloro-2-pentanone.
Discussion
6.

given NO(g)+O_(3)(g)toNO_(2)(g)+O_(2)(g)""DeltaH=198.9kJ//mol O_(3)(g)to3//2O_(2)(g) "" DeltaH=-142.3 kj//mol O_(2)(g)to2O(g) "" DeltaH=+495.0 kj//mol The entalpy change (DeltaH) for the following reaction is NO(g) + O (g) to NO_(2) (g)

Answer»

`-304.1 kJ//mol`
` +304.1 kJ//mol`
`-403.1 kJ//mol`
`+403.1kJ//mol`

Solution :`NO+O_(3)toNO_(2)+O_(2) DeltaH=-198.9 "kJ//mole"`
`O_(3)to3/2O_(2)(G)DeltaH=-142.3 "Kj//mole"`
`O_(2)to2O_(2)(g)DeltaH=+495.0 "K J//mole"`
`DeltaH "of" NO+O(g)toNO_(2)(g)`
` "for this"i-ii-(III)/2`
`198.9-(-142.3)-(495)/2`
304.1 " KJ//mole"`
Discussion
7.

Give one example each of zero order and first order reactions:

Answer»

Solution :`2NH_(3)(g) underset("pt-catalyst")overset(1130K/"pressure")to N_(2)(g) + 3H_(2)(g)` (ZERO order)
`H_(2)O_(2) to H_(2)O(g) + 1//2 O_(2)(g)` (FIRST Order)
Discussion
8.

Give the IUPAC names for the following : (i) Crotonaldehyde (ii) Methyl n-propyl ketone (iii) Phenyl acetaldehyde.

Answer»

SOLUTION :
Discussion
9.

Give the IUPAC names for the following ethers :

Answer»

SOLUTION :
Discussion
10.

Given one method for the preparation of ketone from alcohol.

Answer»

SOLUTION :Secondary alcohols are oxidised to KETONES by chromic anhydride `(CrO_(3))`
`R-underset(OH)underset(|)(CH)-R^(1)-overset(CrO_(3))(to)R-underset(O)underset(||)(C)-R^(1)`
`CH_(3)-underset(OH)underset(|)(CH)-C_(2)H_(5)overset(CrO_(3))(to)CH_(3)-overset(O)overset(||)(C)-C_(2)H_(5)`
Discussion
11.

Give the IUPAC names for the following amines.

Answer»

SOLUTION :
Discussion
12.

Given,NH_(3(g))+3Cl_(2(g))iffNCl_(3(g))+3HCl_((g)),-DeltaH_(1)N_(2(g))+3H_(2(g))iff2NH_(3(g)),-DeltaH_(2)H_(2(g))+Cl_(2(g))iff2HCl_((g)),DeltaH_(3)The heat of formation of NCl_(3(g)) in the terms of DeltaH_(1), DeltaH_(2) and DeltaH_(3) is

Answer»

`DeltaH_(f)=-DeltaH_(1)+(DeltaH_(2))/(2)-(3)/(2)DeltaH_(3)`
`DeltaH_(f)=DeltaH_(1)+(DeltaH_(2))/(2)-(3)/(2)DeltaH_(3)`
`DeltaH_(f)=-DeltaH_(1)-(DeltaH_(2))/(2)-(3)/(2)DeltaH_(3)`
NONE of these

Solution :Find `(1)/(2)N_(2)+(3)/(2)Cl_(2)rarrNCl_(3),DeltaH_(f)`
Multiply Eq. (ii) by 1/2 and add to Eq. (i), Eq. (III) by 3/2 and subtract from Eq. (i), we get
`DeltaH_(f)=-DeltaH_(l)-(DeltaH_(2))/(2)-[+(3)/(2)DeltaH_(3)]`
`=-DeltaH_(l)-(DeltaH_(2))/(2)-(3)/(2)DeltaH_(3)`
Discussion
13.

Give the IUPAC names for the following alcohols :

Answer»

SOLUTION :
Discussion
14.

Given, NH_(3)(g) + 3Cl_(2)(g) NCl_(3)(g) + 3HCl, -DeltaH_(1) N_(2)(g) + Cl_(2)(g) to 2NH_(3)(g),-DeltaH_(2) H_(2)(g) + Cl_(2)(g) to 2HCl_(g),-DeltaH_(3) The heat of formation of NCl_(3)(g) in the terms of DeltaH_(1), DeltaH_(2) and DeltaH_(3) is

Answer»

`Delta_(r)H = -DeltaH_(1) + (DeltaH_(2))/2 -3/2 DeltaH_(3)`
`Delta_(1)H = DeltaH_(1) + (DeltaH_(2))/2 -3/2DeltaH_(2)`
`DeltaH = DeltaH_(1) -(DeltaH_(2))/2 -3/2DeltaH_(2)`
NONE of these

Answer :D
Discussion
15.

Give the IUPAC name of [Zn_2 Fe (CN)_6]

Answer»

SOLUTION :ZINC hexacyano feratte (II)
Discussion
16.

Given , NH_3(g)+3Cl_2(g)⇌NCl_3(g)+3HCl(g),-triangleH_1 N_2(g)+3H_2(g)⇌2NH_3(g), triangleH_2 H_2(g)+Cl_2(g)⇌2HCl(g),+triangleH_3 The heat of formation of NCl_3(g) in the terms of triangleH_1, triangleH_2 and triangle_3 is:

Answer»

`triangleH_f=-triangleH_1+triangle_2/2-3/2triangleH_3`
`triangleH_f=triangleh_1+triangleH_2/2 -3/2triangleH_3`
`triangleH_f=triangleh_1+triangleH_2/2 -3/2triangleH_3`
None

Answer :A
Discussion
17.

Given molar conductivity of an infinite dilution: wedge_(m)^(@) for Ba(OH)_(2)=517.6Omega^(-1)cm^(2)mol^(-1). wedge_(m)^(@) for BaCl_(2)=240.6Omega^(-1)cm^(2)mol^(-1),wedge_(m)^(@) for NH_(4)Cl=129.8Omega^(-1)cm^(2)mol^(-1). Calculate wedge_(m)^(@) for NH_(4)OH.

Answer»


Solution :`wedge_(m)^(@)(BA(OH)_(2))=lamda_(Ba^(2+))^(@)+2lamda_(OH^(-))^(@)`. . . (i)
`wedge_(m)^(@)(BaCl_(2))=lamda_(Ba^(2+))^(@)+2lamda_(Cl^(-))^(@)` . . . (ii)
`wedge_(m)^(@)(NH_(4)Cl)=lamda_(NH_(4)^(+))^(@)+lamda_(Cl^(-))^(@)` . . . (iii)
`wedge_(m)^(@)(NH_(4)OH)=lamda_(NH_(4)^(+))^(@)+lamda_(OH^(-))^(@)+lamda_(OH^(-))^(@)=(1)/(2)eqn.(i)+eqn.(iii)-(1)/(2)`
`=(1)/(2)xx517.6+129.8-(1)/(2)xx240.6=268.3Omega^(-1)cm^(2)MOL^(-1)`
Discussion
18.

Given N_(2)(g)+3H_(2)(g)=2NH_(3)(g),DeltaH^(0)=-22 kcal. The standard enthalpy of formation of NH_(3) gas is

Answer»

`-11 KCAL //"MOLE"`
`11 kcal//"mole"`
`-22 kcal//"mole"`
`22 kcal//"mole"`

ANSWER :A
Discussion
19.

Give the IUPAC name of the product obtained when phenol is oxidized by chromic acid (Na_(2)Cr_(2)O_(7)+ "Conc." H_(2)SO_(4))

Answer»

Cyclohexa-2,5-diene-1,4-dione
Cyclohexa-1,4-dione
Cyclohexanone
Cyclohexa-1,4-diene-2,5-dione

Solution :Cyclohexa-2,5-diene-1,4-dione
Discussion
20.

Given N_2(g)+3H_2(g)=2NH_3(g), triangleH^@=-22kcal. The standard enthalpy of formation of NH_3 gas is:

Answer»

`-11 kcal/mol`
`11 kcal/mol`
`-22 kcal/mol`
`22 kcal/mol`

ANSWER :A
Discussion
21.

Give the IUPAC name of [Ti(H_(2)O)_(6)]^(3+). Draw cis and trans isomers of [Pt(NH_(3))_(2)Cl_(2)].

Answer»

SOLUTION :
Discussion
22.

Give the IUPAC name of the product formed when : (1) 2 -Methyl-1-bromopropane is treated with sodium in the presence of dry ether. (ii) 1-Methyl cyclohexene is treated with HI. (iii) Chloroethane is treated with silver nitrite.

Answer»

SOLUTION :`(i) 2CH_(3) - overset(CH_(3))overset(|)(CH) - CH_(2)BR + 2NA overset("Ether")to underset("2,5-Dimethylhexane")(CH_(3) - overset(CH_(3))overset(|)(CH) - CH_(2) - CH_(2) - overset(CH_(3))overset(|)(CH) - CH_(3))`
(ii)
(III) `CH_(3)CH_(2)Cl overset(AgNO_(2))to underset("Nitroethane")(CH_(3)CH_(2)NO_(2))`
Discussion
23.

Given: Mass of electron =9.11xx10^(-31)kg Plank's constant =6.626xx10^(-34)Js The uncertaintly involved in the measurement of velocity with in a distance of 0.1Å is

Answer»

`5.79xx10^(7)MS^(-1)`
`5.79xx10^(8)ms^(-1)`
`5.79xx10^(5)ms^(-1)`
`5.79xx10^(6)ms^(-1)`

Solution :`DELTAX=0.1xx10^(-10)=10^(-11)m`
`Deltav=h/(4 pi m Deltax)`
`=(6.626xx10^(-34))/(4xx3.14xx9.11xx10^(-31)xx10^(-11))`
`=5.79xx10^(6)ms^(-1)`
Discussion
24.

Give the IUPAC name of the only aldehyde which undergoes iodoform test.

Answer»

Solution :ETHANAL `(CH_(3)CHO)` CONTAINS the grouping `CH_(3)CO-` and hence undergoes iodorom test and gives yellow ppt. of iodoform `(CHI_(3))` on treatment with `I_(2)//NAOH`.
`underset("Ethanal")(CH_(3)CHO) overset(I_(2)//NaOH) to underset("Iodoform")(CHI_(3))+ underset("Sod. FORMATE")(HCOONa)`.
Discussion
25.

Given IUPAC names of the following structures .

Answer»

SOLUTION :(i) 3-Bromo -4- methylheptane
(ii) 1,1,1,- Trichlorobut -2- ene
3- Bromocyclopropene
Discussion
26.

Give the IUPAC name of the following compounds : H_(2)C=CH-underset(OH)underset("|")"CH"-CH_(2)-CH_(2)-CH_(3)

Answer»

Solution :`underset("Hex-1-en-3-ol")(H_(2)overset(1)C=overset(2)CH-underset(OH)underset("|")overset("3")"CH"-overset(4)CH_(2)-overset(5)CH_(2)-overset(6)CH_(3))`
Discussion
27.

Given is the energy profile diagram of nitration of benzene using mixed acid. (HNO_(3) + H_(2)SO_(4)) Identify (x) in above reaction:

Answer»




None

Solution :ELECTROPHILIC AROMATIC SUBSTITUTION.
Discussion
28.

Give the IUPAC name of the following compound.overset(CH_(3)-N-CH_(3))overset(|)(CH_(3))

Answer»

SOLUTION :`OVERSET(CH_(3)-N-CH_(3))overset(|)(CH_(3))`
N,N - DIMETHYLMETHANAMINE
Discussion
29.

Given is the energy profile diagram of nitration of benzene using mixed acid. (HNO_(3) + H_(2)SO_(4)) Identify T. S_(1) in the above reaction.

Answer»




None

Solution :ELECTROPHILIC AROMATIC SUBSTITUTION.
Discussion
30.

Give the IUPAC name of the following compounds : (CH_(3))_(3)-C-underset(O)underset(||)C-COOH

Answer»

Solution :IUPAC name of the compound is
`UNDERSET("3, 3 - dimethyl-2- oxobutanoic ACID")((CH_(3))_(3)-overset(3)C-underset(O)underset(||)overset(2)C-overset(1)COOH)`
Discussion
31.

Given is the energy profile diagram of nitration of benzene using mixed acid. (HNO_(3) + H_(2)SO_(4)) Identify T.S_(2) in the above reaction.

Answer»




None

Solution :ELECTROPHILIC AROMATIC SUBSTITUTION.
Discussion
32.

Give the IUPAC name of the following compounds : CH_(3)-underset(CH_(3))underset("|")"C "=underset(Br)underset(|)C-CH_(2)OH

Answer»

Solution :`underset("2-Bromo-3-methylbut-2-en-1-ol")(overset(4)CH_(3)-overset("3")underset(CH_(3))underset("|")"C "=overset(2)underset(Br)underset(|)C-overset(1)CH_(2)OH)`
Discussion
33.

Give the IUPAC name of the following compounds. CH_(3)-overset(S)overset(||)(C)-CH_(2)-COOH

Answer»

3-Thiabutanoic ACID
3-Sulphobutanoic acid
3-Thiobutanoic acid
3- Thioxobutanoic acid

Answer :a
Discussion
34.

Give the IUPAC name of the following compound : CH_(2) = underset(CH_(3))underset(|)C- CH_(2) Br

Answer»

Solution :`UNDERSET("3-Bromo -2-methyl - PROP -1-ene") (CH_(2)=underset(CH_(3))underset(|)C - CH_(2) Br)`
Discussion
35.

Given is mechanism of Beakmann rearrangement. Which of the following reagent cannot used in Beckmann rearrangement ?

Answer»

TsOH
`R-DO_(2)Cl`
`BF_(3)`
PH - Li

Solution :Consider Lewis ACID.
Discussion
36.

Given is mechanism of Beakmann rearrangement. Rate determining steo=p in Beckmann rearrangement :

Answer»

I
II
III
IV

Solution :ALKYL GROUP ANTI MIGRATION is RDS.
Discussion
37.

Give the IUPAC name of the following compound.

Answer»


ANSWER :4-Broma-methyl-pent-2-ene.
Discussion
38.

Given is mechanism of Beakmann rearrangement. Product (A) of the above reaction is :

Answer»




SOLUTION :ANTI ALKYL GROUP MIGRATE.
Discussion
39.

Give the IUPAC name of the compound (CH_(3)CH_(2))_(3)N.

Answer»


ANSWER :N, N-diethylethanamine
Discussion
40.

Given is mechanism of Beakmann rearrangement. On treatment H_(2)SO_(4) followerd by hydrolysisin acidic medium above compound gives.

Answer»

`CH_(3)-CO_(2)H,Ph-NH_(2)`
`CH_(3)-NH_(2),Ph-CO_(2)H`
`Ph-CH_(2)-NH_(2)+Ph-CO_(2)H`
`Ph-CH_(2)H-CH_(3)-CO_(2)H`

SOLUTION :
Discussion
41.

Give the IUPAC name of the compound CH_(3)-CH_(2)-CH=CH-CHO.

Answer»

SOLUTION :Pent-2-enal
Discussion
42.

Given : (i)MnO_(4)^(-)+8H^++5e^(-)toMn^(2+)+4H_2O , E^0=x_1V (ii)MnO_(2)+4H^++2e^(-)toMn^(2+)+2H_2O , E^0=x_2V Find E^(@) for the following reaction : MnO_(4)^(-)+4H^++3e^(-)toMnO^(2)+2H_2O

Answer»

`x_(2)-x_(1)`
`x_(1)-x_(2)`
`(5x_(1)-2x_2)/3`
`(2x_(1)-5x_2)/3`

SOLUTION :`DeltaG_1^@=-5x_1F , " " DeltaG_2^@=-2x_2F`
`DeltaG_3^@=DeltaG_1^@-DeltaG_2^@ , " " DeltaG_3^@=2x_2F-5x_1F`
`therefore X=(5x_1-2x_2)/3`
Discussion
43.

Give the IUPAC name of the compound given below: CH_(3)- underset(Cl)underset(|)CH- CH_(2)- CH_(2)- underset(OH)underset(|)CH-CH_(3)

Answer»

2-Chloro-5-hydroxyhexane
2-Hydroxy-5-chlorohexane
5-Chlorohexan-2-ol
2-Chlorohexan-5-ol

Solution : 5-Chlorohexan-2-ol
Discussion
44.

Given: (i) Cu^(2+)+2e^(-)toCu,""E^(o)=0.337V (ii) Cu^(2+)+e^(-)toCu^(+),""E^(o)=0.153V Electrode potential, E^(o) for the reaction, Cu^(+)+e^(-)toCu, will be

Answer»

0.52 V
0.90 V
0.30 V
0.38 V

Solution :`DeltaG^(@)=nFE^(@)`
For, `Cu^(2+)+2e^(-)toCu,DeltaG_(1)^(@)=-2F(0.337)`. . . . (i)
`Cu^(2+)+e^(-)toCu^(+),DeltaG_(2)^(@)=-F(0.153)` . . . (ii)
Subtracting (ii) from (i),
`Cu^(+)+e^(-)toCu`
`DeltaG^(@)=-0.674F+0.153F`. . . (iii)
`nFE^(@)=-0.521F`
`because`For (iii), n=1, `thereforeE^(@)=0.521V`.
Discussion
45.

Give the IUPAC name of the complex ["CO"("NH"_(3))_(4)"Cl"_(2)]^(+). Write geometrical isomers for this complex.

Answer»

SOLUTION :Tetraamminedichlorido COBALT (III) ION.
Discussion
46.

Given HF+ H_2O overset(K_a)rarr H_3O^+ + F^- F^- +H_2O overset(K_b) HF + OH^- Which relation is correct?

Answer»

`K_b=K_w`
`K_b = 1/K_w`
`K_axxk_b = K_w`
`K_a/K_b=K_w`

ANSWER :C
Discussion
47.

Give the IUPAC name of (NH_(4)MCo(ONO)_(6)].

Answer»

SOLUTION :AMMONIUM hexanitrito-O-cobaltate(IL!).
Discussion
48.

Given {:(HF+H_(2)O overset(K_(a))rarrH_(3)O^(+) + F^(-)),(F^(-) + H_(2)O overset(K_(b))rarr HF + OH^(-)):} Which of the following reaction is correct

Answer»

`K_(b) = K_(w)`
`K_(b) = (1)/(K_(w))`
`K_(a) XX K_(b) = K_(w)`
`(K_(a))/(K_(b)) = K_(w)`

SOLUTION :`K_(a) = ([H_(3)O^(+)][F^(-)])/([HF])` .... (i)
`K_(b) = ([HF][OH^(-)])/([F^(-)])`
From (i) and (ii), `K_(a)K_(b) = [H_(3)O^(+)][OH^(-)] = K_(w)`
(IONIC product of WATER).
Discussion
49.

given H_(2)O(l) to H^(+)(aq) + OH^(-)(aq),DeltaH= 57.32 kJ H_(2)(g) + 1/2O_(2)(g) to H_(2)O(l),DeltaH =-286.02 kJ then , calculate the enthalpy of formation of OH^(-) at 25^(@)C

Answer»

`-228.8kJ`
`-343.52 kJ`
`+228.8 kJ`
`+ 343. 52 kJ`

SOLUTION :consider the formation of `H_(2)O`
`H_(2)(g)+1/2O_(2)(g) to H_(2)O(l),DELTAH=-286.20 kJ`
`DeltaH_(r)= DeltaH_(t)[H_(2)O(l)]-DeltaH_(t)[H_(2)(g))]-1/2 DeltaH_(t)[O_(2)(g)] `
` DeltaH_(t)(H_(2)O(l))=-286.20`
now consdier the ionisation of `H_(2)O`
`H_(2)O(l) to H^(+)(aq)+ OH^(-)(aq), DeltaH = 57.32KJ H_(2)O(l) to H^(+)(aq)+ OH^(-)(aq), DeltaH = 57.32KJ`
Discussion
50.

Given : H_(2)(g) + (1)/(2) O_(2)(g) = H_(2)O(g) + q_(1) H_(2)(g) + (1)/(2) O_(2)(g) = H_(2)O(l) + q_(2) The enthalpy of vaporisation of water is equal to

Answer»

`q_(1) + q_(2)`
`q_(1) - q_(2)`
`q_(2) - q_(1)`
`q_(1) q_(2)`

Solution :(i) `H_(g) +½ O_(2) (g) rarr H_(2)0(g) + q_(1)`
(ii) `H_(2)(g) + ½ O _(2) (g) rarr H_(2) O (L) + q_ (2)`
SUBTRACT EQ. (ii) from eq. (i).
`H_(2)O(l) rarr H_(2)O(g) + q_(1) - q_(2)`
:. `DELTA H = -(q_(1) - q_(2)) = q_(2) - q_(1)`
Discussion