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

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 ______.

The functional group present in acetic acid is ______.

The unsaturated hydrocarbons undergo ______.

The catalyst used for the conversion of ethane to ethane is commonly ______.

When acetaldehyde is oxidized with acidified potassium dichromate, it forms ______.

Ethanoic acid reacts with ethanol in the presence of concentrated H₂SO₄, so as to form a compound and water. The chemical reaction which takes place is called ______.

Write the equation for the reaction taking place between 1, 2-dibromoethane and alcoholic potassium hydroxide.

Write a balanced chemical equation for the following:

Monochloroethane is hydrolysed with aqueous KOH.

Write a balanced chemical equation for the following:

A mixture of sodalime and sodium acetate is heated.

Write a balanced chemical equation for the following:

Water is added to calcium carbide.

Give reason for the following :

Methane does not undergo addition reaction, but ethane does

Give reason for the following :

Ethyne is more reactive than ethane