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ICSE chemistry

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Question
ICSEENICH12029242
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Correct the following statements :

A system which can exchange neither matter nor energy with the surroundings is called a closed system.

Solution

A system which can exchange energy not matter with the surroundings is called a closed system.

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Question
ICSEENICH12029243
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Correct the following statements :

Hydrolysis of an isocyanide in the presence of an acid yields primary amine and methyl alcohol.

Solution

Hydrolysis of an isocyanide in the presence of an acid yield primary amine and formic acid
CH subscript 3 NC space rightwards arrow with straight H divided by straight H subscript 2 straight O on top space CH subscript 3 NH subscript 2 space plus HCOOH with formic space acid below

Question
ICSEENICH12029244
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Correct the following statements :

Dissociation of hydrogen sulphide is suppressed in an acidic medium because of neutralization.

Solution

Dissociation of hydrogen sulphide (H2S) is suppressed in acidic medium because of common ion effect.

Question
ICSEENICH12029245
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Correct the following statements :

When tin is treated with cold and very dilute nitric acid, stannic acid is formed.

Solution

When tin is treated with hot and concentrated nitric acid, stannic acid is formed.

Question
ICSEENICH12029246
Wired Faculty App

Correct the following statements :

Oxidation of sucrose with concentrated nitric acid yields glycerol.

Solution

Oxidation of sucrose with concentrated nitric acid yield oxalic acid.

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