Chemistry Test

Result

Chemistry Test - 22

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Weekly Quiz Competition

Question 1
3 / -1

Isocyanide can be prepared from alkyl halide on treatment with

A
KNC

B
AgNC

C
KCN

D
AgCN

Solution
Question 2
3 / -1

Acrylonitrile is formed by the reaction of

A
acrylic acid and KCN

B
ethyne and KCN

C
ethyne and HCN/Ba²⁺

D
ethyne and HOCl

Solution
Question 3
3 / -1

Formation of terylene is an example of

A
condensation polymerisation

B
addition polymerisation

C
esterification

D
saponification

Solution

Terylene (a polyester) is formed by condensation polymerization and the structure of Terylene represented as

This is the same kind of 'ester linkage' (-COOC-) found in fats which are combination of long chain fatty carboxylic acids and glycerol (alcohol with 3 -OH groups, a 'triol').
Question 4
3 / -1

Which of the following statements is incorrect?

A
Pure aluminium oxide is obtained by heating aluminium hydroxide.

B
Cryolite lowers down the melting temperature of bauxite in the electrolyte cell for extraction of aluminium.

C
Carbonate ores are converted into oxides by roasting ore in air.

D
Mercury cannot be produced by roasting the ore cinnabar in air.

Solution

Carbonate ores are converted into oxides through the process of calcination.
Question 5
3 / -1

A
16.761

B
26.383

C
13.260

D
23.484

Solution
Question 6
3 / -1

The rate of a reaction can be increased in general by all the factors except by

A
using a catalyst

B
increasing temperature

C
increasing the activation energy

D
increasing the concentration of reactant

Solution

This option is correct because, it is the minimum amount of energy required by reactant molecule to get converted into product. Hence this option is correct.
Question 7
3 / -1

R₁ is the rate of a simple reaction, 2NO + O₂ 2NO₂.

If the volume of the reaction vessel is doubled, the rate of the reaction becomes

A
(1/8)R₁

B
8R₁

C
R₁

D
(1/2)R₁

Solution
Question 8
3 / -1

Ethylene is converted to X on passing through a mixture of an acidified aqueous solution of palladium chloride and cupric chloride. Which of the following reagents readily take part in addition reaction with X?

A
Br₂

B
HBr

C
HCl

D
HCN

Solution
Question 9
3 / -1

The widely used PVC is a polymerised product of

A
CH₂ = CH₂

B
CH₂ = CCl₂

C
CH₂Cl.CH₂Cl

D
CH₂= CHCl

Solution

Polyvinyl chloride is produced by polymerisation of the monomer vinyl chloride (VCM), as shown below.
Question 10
3 / -1

Which of the following statements correctly represents one of the characteristic of the lanthanides?

A
Most of the their ions are coloured.

B
They have greater tendency towards complex formation.

C
Their compounds are more basic.

D
They are generally non radioactive

Solution

This is correct as except promethium, lanthanides are non radioactive.