(English Medium) ICSE Class 10 - CISCE Question Bank Solutions

Choose the correct answer:

Select the acid which contains four hydrozen atoms in it.

Write a fully balanced equation for the folowing case:

Acitic acid is warmed with ethanol in the presence of concentrated sulpheric acid.

Give chemical equation for:

The laboratory preparation of methane from sodium acetate.

Give chemical equation for:

The reaction of one mole of ethene with one mole chlorine gas.

Give chemical equation for:

The preparation of ethyne from 1,2 - dibromoethane.

State how the following conversions can be carried out:

Ethyl chloride to Ethyl alcohol

State how the following conversion can be carried out:

Ethyl chloride to Ethene.

State how the following conversions can be carried out:

Ethene to Ethyl alcohol.

State how the following conversions can be carried out:

Ethyl alcohol to Ethane

Define isomerism.

An organic compound undergoes addition reactions and gives a red colour precipitate with ammoniacal cuprous chloride. Therefore, the organic compound could be ______.

The organic compound mixed with ethanol to make it spurious is ______.

Compound A is bubbled through bromine dissolved in carbon tetrachloride, and the product is CH₂Br – CH₂Br.
\[\ce{A ->[Br2/CCl4] CH2Br - CH2Br}\]

1. Draw the structural formula of A.
2. What type of reaction has A undergone?
3. What is your observation?
4. Name (not formula) the compound formed when steam reacts with A in the presence of phosphoric acid.
5. What is the procedure for converting the product of (iv) back to A?

Compound A is bubbled through bromine dissolved in carbon tetrachloride and the product is CH₂Br - CH₂Br.
\[\ce{A ->[Br2/Od4] CH2Br - CH2Br}\]

 What type of reaction has A undergone?

Compound A is bubbled through bromine dissolved in carbon tetrachloride and the product is CH₂Br - CH₂Br.
\[\ce{A ->[Br2/Od4] CH2Br - CH2Br}\]

What is your observation

Compound A is bubbled through bromine dissolved in carbon tetrachloride and the product is CH₂Br - CH₂Br.
\[\ce{A ->[Br2/Od4] CH2Br - CH2Br}\]

Name (not formula) the compound formed when steam reacts with A in the presence of phosphoric acid.

Compound A is bubbled through bromine dissolved in carbon tetrachloride and the product is CH₂Br - CH₂Br.
\[\ce{A ->[Br2/Od4] CH2Br - CH2Br}\]

What the procedure for converting the product of (b) (IV) back to A?

Give reason as to why :

 Almost 90% of all known compounds are organic in nature

Give reason as to why :

 It is dangerous to burn methane in an insufficient supply of air.

The number of C-H bonds in an ethane molecule is ______.