Explore topic-wise InterviewSolutions in Current Affairs.

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1.

p-Amino-N,N-dimethylaniline is added to a strongly acidic solution of X.The resulting solution is treated with few drops of aqueous solution of Y to yield blue colouration due to the formation of methylene blue.Treatment of the aqueous solution of Y with the reagent potassium hexacyanoferrate(II) leads to the formation of an intension blue precipitate.The precipitate dissolves on excess addition of the reagent.Similarly, treatment of the solution of Y with the solution of potassium hexacyanoferrate(III) leads to a brown coloration due to the formation of Z. The compound Z is:

Answer»

`Mg_(2)[Fe(CN)_(6)]`
`Fe[Fe(CN)_(6)]`
`Fe_(4)[Fe(CN)_(6)]_(3)`
`K_(2)Zn_(3)[Fe(CN)_(6)]_(2)`

Solution :
The COMPOUND `X` is `Na_(2)S` and `Y` is `FeCl_(3)`
Discussion
2.

p-aminobenzoic acid reacts with bromine and H_(2)O to give

Answer»




SOLUTION :
Discussion
3.

p -amino phenol is the product of readucing nitrobezene in…………….

Answer»

ACID medium
basic medium
electrolytic reduction
neutral medium

Answer :C
Discussion
4.

p-Amino-N,N-dimethylaniline is added to a strongly acidic solution of X.The resulting solution is treated with few drops of aqueous solution of Y to yield blue colouration due to the formation of methylene blue.Treatment of the aqueous solution of Y with the reagent potassium hexacyanoferrate(II) leads to the formation of an intension blue precipitate.The precipitate dissolves on excess addition of the reagent.Similarly, treatment of the solution of Y with the solution of potassium hexacyanoferrate(III) leads to a brown coloration due to the formation of Z. The compound Y is :

Answer»

`MgCl_(2)`
`FeCl_(2)`
`FeCl_(3)`
`ZnCl_(2)`

Solution :
The COMPOUND `X` is `Na_(2)S` and `Y` is `FeCl_(3)`
Discussion
5.

p-Amino-N,N-dimethylaniline is added to a strongly acidic solution of X.The resulting solution is treated with few drops of aqueous solution of Y to yield blue colouration due to the formation of methylene blue.Treatment of the aqueous solution of Y with the reagent potassium hexacyanoferrate(II) leads to the formation of an intension blue precipitate.The precipitate dissolves on excess addition of the reagent.Similarly, treatment of the solution of Y with the solution of potassium hexacyanoferrate(III) leads to a brown coloration due to the formation of Z. The compound X is:

Answer»

`NaNO_(3)`
`NACL`
`Na_(2)SO_(4)`
`Na_(2)S`

SOLUTION :
The compound `X` is `Na_(2)S` and `Y` is `FeCl_(3)`
Discussion
6.

p-Amino-N, N-dimethylaniline is added to a strongly acidic solution of X. The resulting solution is treated with a few drops of aqueous solution of Y to yield blue coloration due to the formation of mothylene blue. Treatment of the aqueous solution of Y with the reagent potassium hexacyanoferrate (II) leads to the formation of an intense blue precipitate. The precipitate dissolves on excess addition of the reagent. Similarly, treatment of the solution of Y with the solution of potassium hexacyanoferrate (III) leads to a brown coloration due to the formation of Z.Q The compound Z is

Answer»

`Mg_(2)[Fe(CN)_(6)]`
`Fe[Fe(CN)_(6)]`
`Fe_(4)[Fe(CN)_(6)]_(3)`
`K_(2)Zn_(3)[Fe(CN)_(6)]_(2)`

Solution :(B)
Discussion
7.

p-Amino-N, N-dimethylaniline is added to a strongly acidic solution of X. The resulting solution is treated with a few drops of aqueous solution of Y to yield blue coloration due to the formation of mothylene blue. Treatment of the aqueous solution of Y with the reagent potassium hexacyanoferrate (II) leads to the formation of an intense blue precipitate. The precipitate dissolves on excess addition of the reagent. Similarly, treatment of the solution of Y with the solution of potassium hexacyanoferrate (III) leads to a brown coloration due to the formation of Z.Q The compound Y is

Answer»

`MgCl_(2)`
`FeCl_(2)`
`FeCl_(3)`
`ZnCl_(2)`

SOLUTION :(C )
Discussion
8.

p-Amino-N, N-dimethylaniline is added to a strongly acidic solution of X. The resulting solution is treated with a few drops of aqueous solution of Y to yield blue coloration due to the formation of mothylene blue. Treatment of the aqueous solution of Y with the reagent potassium hexacyanoferrate (II) leads to the formation of an intense blue precipitate. The precipitate dissolves on excess addition of the reagent. Similarly, treatment of the solution of Y with the solution of potassium hexacyanoferrate (III) leads to a brown coloration due to the formation of Z.Q The compound X is

Answer»

`NaNO_(3)`
NaCl
`Na_(2)SO_(4)`
`Na_(2)S`

Solution :(D)
Discussion
9.

p-amino-N, N-dimethyl laniline is added to a strongly acidci solution of x. The resulting solution is treated with a few drops of aqueous solution of Y to yield blue colouration due to the formation of methylene, blue. Treatment of the aqueous solution of Y with the reagent potassium hexaxyanoferrate (II) leads to the formation of an intense blue precipitate. The precipitate of the solution of Y with the solution of potassium hexacyanoferrate (III) leads to a brown colouration due to the formation of Z.

Answer»

`Mg_(2)[Fe(CN)_(6)]`
`Fe[Fe(CN)_(6)]`
`Fe_(4)[Fe(CN)_(6)]_(3)`
`K_(2)Zn_(3)[Fe(CN)_(6)]_(2)`

ANSWER :B
Discussion
10.

p-amino-N, N-dimethyl laniline is added to a strongly acidci solution of x. The resulting solution is treated with a few drops of aqueous solution of Y to yield blue colouration due to the formation of methylene, blue. Treatment of the aqueous solution of Y with the reagent potassium hexaxyanoferrate (II) leads to the formation of an intense blue precipitate. The precipitate of the solution of Y with the solution of potassium hexacyanoferrate (III) leads to a brown colouration due to the formation of Z. The compound Y, is

Answer»

`MgCl`
`FeCl_(2)`
`FeCl_(3)`
`ZnCl_(2)`

ANSWER :C
Discussion
11.

p-amino-N, N-dimethyl laniline is added to a strongly acidci solution of x. The resulting solution is treated with a few drops of aqueous solution of Y to yield blue colouration due to the formation of methylene, blue. Treatment of the aqueous solution of Y with the reagent potassium hexaxyanoferrate (II) leads to the formation of an intense blue precipitate. The precipitate of the solution of Y with the solution of potassium hexacyanoferrate (III) leads to a brown colouration due to the formation of Z. The compound X, is

Answer»

`NaNO_(3)`
`NACL`
`Na_(2)SO_(4)`
`Na_(2)S`

Answer :D
Discussion
12.

p-amine and s-amine are distinguished by :

Answer»

`Br_2//KOH`
HCLO
`NHO_2`
`NH_3`

ANSWER :C
Discussion
13.

Ozonolysis of the following gives only acetaldehyde

Answer»

2 - BUTENE
1- Butene
ISOBUTYLENE
Ethylene

Answer :A
Discussion
14.

Ozonolysis of terminal alkenes gives ________ as one of the products.

Answer»

acetone
acetaldehyde
water
formaldehyde

Answer :D
Discussion
15.

Ozonolysis of propene givs

Answer»

only formaldehyde.
only acetaldehyde.
formaldehyde and acetladehyde.
propionaldehyde.

Answer :C
Discussion
16.

Ozonolysis of propyne gives:

Answer»

`CH_3CHO`
`CH_3COCHO`
HCHO
CHOCHO

Answer :B
Discussion
17.

Ozonolysis of C_(7)H_(14) give methanal and 2- methyl pentan -3- one . The C_(7)H_(14) is

Answer»

2- ETHYL 3 - methyl but -1- ene
3- ethyl -2- methyl but -3- ene
hept -1- ene
hept -2- ene

ANSWER :A
Discussion
18.

Ozonolysis of an organic compound gives formaldehyde as one of the products. This confirms the presence of :

Answer»

two ethylenic double bonds
a vinyl GROUP
an ISOPROPYL group
an acetylenic triple bond

SOLUTION :Vinyl group on OZONOLYSIS gives formaldehyde as one of the PRODUCTS.
Discussion
19.

Ozonolysis of an organic compound 'A' produces acetone and propionaldehyde in equimolar mixture. Identify 'A' from the following compounds

Answer»

2-Methyl-1-pentene
1-pentene
2-pentene
2-methyl-2-pentene

Solution :
Discussion
20.

Ozonolysis of an organic compound 'A' produces acetone and propionaldehyde in equimolar mixture. Identify 'A' from the following compounds :

Answer»

`1`-PENTENE
`2`-Pentene
`2`-METHYL-`2`-pentene
`2`-Methyl-`1`-pentene

Solution :
Discussion
21.

Ozonolysis of an alkene produces only one dicarbonylcompound . The structure of the alkene is

Answer»

`CH_3 - CH = CH - CH_3`


`CH_3 - CH = CH - CH = CH_2`

Solution :As the PRODUCT is only ONE dicarbonyl compound it MUST be (B) .
Discussion
22.

Ozonolysis of an alkene [A] followed by decomposition with water and a reducing agent gave a mixture of two isomers of the formula C_(3)H_(6)O. The structure of alkene is :

Answer»

`CH_(2) = CH CH_(2)CH (CH_(3))_(2)`
`(CH_(3))_(2) C = CH CH_(2)CH_(3)`
`(CH_(3))_(2) CH CH = CH CH_(3)`
`CH_(3) underset(CH_(2))underset(||)(C C)H_(2)CH_(2)CH_(3)`

SOLUTION :`CH_(3) - overset(CH_(3))overset(|)(C) = O + O = overset(H)overset(|)(C) - CH_(2) - CH_(3) RARR CH_(3) - overset(CH_(3))overset(|)(C) = overset(H)overset(|)(C) - CH_(2)CH_(3)`
Discussion
23.

Ozonolysis of a compound Agathene dicarboxylic acid gives following compounds : on complete reduction by Na-EtOH Agathene dicarboxylic acid give hydrocarbon C_(20)H_(38) which have 5 chiral carbon in True statement about Agathene dicarboxylic acid is :

Answer»

It GIVES PPT. with Tollen's reagent.
It gives red colour with 2,4-dinitrophenyl hydrazine
It gives off effervescence of `overset(12)"C"O_(2)` with `NaHoverset(14)"C"O_(3)`.
None of the above

Answer :D
Discussion
24.

Ozonolysis of acetylene gives

Answer»

Glycol
Glyoxal , FORMIC acid
Formaldehyde
None

Answer :B
Discussion
25.

Ozonolysis of a compound Agathene dicarboxylic acid gives following compounds : on complete reduction by Na-EtOH Agathene dicarboxylic acid give hydrocarbon C_(20)H_(38) which have 5 chiral carbon in The structure of Agathene dicarboxylic acid is :

Answer»




ANSWER :A
Discussion
26.

Ozonolysis of a compound Agathene dicarboxylic acid gives following compounds : on complete reduction by Na-EtOH Agathene dicarboxylic acid give hydrocarbon C_(20)H_(38) which have 5 chiral carbon in How many chiral carbon are present in agathene diocarboxylic acid?

Answer»

2
3
4
5

Answer :C
Discussion
27.

Ozonolysis of a compound Agathene dicarboxylic acid gives following compounds : on complete reduction by Na-EtOH Agathene dicarboxylic acid give hydrocarbon C_(20)H_(38) which have 5 chiral carbon in Total stereoisomers therotically possible for Agathene dicarboxylic acid are:

Answer»

16
18
32
64

Answer :C
Discussion
28.

Ozonolysis of a compound Agathene dicarboxylic acid gives following compounds : on complete reduction by Na-EtOH Agathene dicarboxylic acid give hydrocarbon C_(20)H_(38) which have 5 chiral carbon in Structure of product formed when Agathene dicarboxylic acid is heated with soda lime is :

Answer»




ANSWER :A
Discussion
29.

Ozonolysis of 2,3-Dimethyl-1-butene followed by reduction with zinc and water gives?

Answer»

Methanoic ACID and 3-methyl-2-butanonoe
Methanal and 3-methyl-2-butanone
Methanal and 2-methyl-3-butanone
Methanoic acid and 2-methyl-3-butanone

Answer :B
Discussion
30.

Ozonized oxygen can be prepared by the reaction of H_(2)O with

Answer»

`CONC. H_(2)SO_(4)`
`KMnO_(4)`
`K_(2)MnO_(4)`
`F_(2)`

Answer :D
Discussion
31.

During ozonolysis of 1mole of benzene, number of moles of ozone consumed is

Answer»


SOLUTION :
Discussion
32.

Ozonization of water is carried out to remove

Answer»

BACTERIAL impurities
BAD taste
Excess of CHLORINE present
CALCIUM and magnesiui slat present in it

ANSWER :A
Discussion
33.

Ozonised oxygen can be obtained from H_2O the action of

Answer»

CONC. `H_2SO_4`
`KMnO_4`
`MnO_4^(2-)`
`F_2`

Solution :A MIXTURE of `O_2 and O_3` is CALLED ozonised oxygen
Discussion
34.

Ozonised oxygen can be obtained from H_(2)O by the action of

Answer»

CONC. `H_(2)SO_(4)`
`KMnO_(4)`
`MnO_(4)^(2-)`
`F_(2)`

ANSWER :D
Discussion
35.

Ozonisation of water is carried to remove

Answer»

BACTERIAL IMPURITIES
Bad taste
Excess of CHLORINE present
Calcium and MAGNESIUM SALTS present in it

Answer :A
Discussion
36.

Ozonisation of water is carried out to remove

Answer»

BACTERIAL impurities
Bad taste
Excess of chlorine present
Calcium and magnesium SALT present in it

Answer :A
Discussion
37.

Ozone with KI solution produces

Answer»

`Cl_(2)`
`I_(2)`
`HI`
`IO_(3)`

Solution :`{:(O_(3) to O_(2) +[O]),(2KI + H_(2)O + [O] to 2KOH +I_(2)),(bar(2KI +H_(2)O +O_(3) to 2KOH + I_(2) +O_(2))):}`
Discussion
38.

Ozone when reacts with potassium iodide solution liberates certain product, which turns starch paper blue. The liberated substance is. . . .

Answer»

Oxygen
Iodine
Hydrogen ioidide
Potassium hydroxide

Solution :Ozone react with KI solution to liberate `I_(2)` GAS.
Discussion
39.

Ozone with dry iodine give

Answer»

`I_(4)O_(4)`
`I_(2)O_(3)`
`IO_(2)`
`I_(2)O_(4)`

Solution :`4O_(2) + 6I_(2) (DRY) to 3I_(4) O_(4)`
Discussion
40.

Ozone turns trimethyl paper

Answer»

GREEN
VIOLET
Red
Black

Answer :B
Discussion
41.

Ozone uses all oxygen atoms in the oxidation reaction with

Answer»

`SO_(2)` only
Acidified`SnCl_(2)` only
PBS only
Both 1 and 2

ANSWER :D
Discussion
42.

Ozone turns tetramethyl base paper:

Answer»

Green
Violet
Red
Black

Answer :B
Discussion
43.

Ozone turns benzidine paper:

Answer»

Violet
Brown
Blue
Red

Answer :C
Discussion
44.

Ozone turns benzidine paper :

Answer»

VIOLET
brown
BLUE
RED

Solution :`O_(3)` turns Benzidine paper to brown.
Discussion
45.

Ozone tarnishes silver metal. How many number of moles of O_(2) are evolved?

Answer»


SOLUTION :`{:(2Ag+O_(3)to Ag_(2)O+O_(2)),(UL(Ag_(2)O+O_(3)to2Ag+2O_(2))),(2Ag+2O_(3) to 2Ag+3O_(2)):}`
Discussion
46.

Ozone readily dissolves in :

Answer»

`H_(2)O`
`CH_(3)OH`
TURPENTINE OIL
ammonia

Solution :Ozone only DISSOLVED in terpentoil
Discussion
47.

Ozone tails mercury. The reaction is ……..of Hg:

Answer»

Reduction
Oxidation
Substitution
None of these

Answer :B
Discussion
48.

Ozone shows reducing property with

Answer»

PbS
KI
`I^(-)`
`H_(2)O_(2)`

ANSWER :D
Discussion
49.

Ozone readily dissolve in

Answer»

WATER
`CS_(2)`
ammonia
turpentine oil

Answer :D
Discussion
50.

Ozone reacts with K_4[Fe(CN)_6] to form ..........

Answer»

`Fe_(2)O_(3)`
`K_(3)[Fe(CN)_(6)]`
`Fe_(3)O_(4)`
`Fe(OH)_(2)`

Solution :`6K_(4)[Fe(CN)_(6)] + O_(3) + 3H_(2)O to 6K_(3)[Fe(CN)_(6)] + 6KOH`
Discussion