English Medium इयत्ता १० - CBSE Question Bank Solutions

In the following diagram showing dispersion of white light by a glass prism, the colours 'P' and 'Q’ respectively are:  

State the colour which bends:

1. The most.
2. The least while passing through a glass prism.

Write the name and general formula of a chain of hydrocarbons in which an addition reaction with hydrogen is possible. State the essential condition for an addition reaction. Stating this condition, write a chemical equation giving the name of the reactant and the product of the reaction.

Define the term ‘structural isomerism’.

List two reasons for carbon forming a large number of compounds. Name the type of bonding found in most of its compounds. Why does carbon form compounds mainly by this kind of bonding?

Select saturated hydrocarbons from the following: C₃H₆; C₅H₁₀; C₄H₁₀; C₆H₁₄; C₂H₄

Write the number of covalent bonds in the molecule of propane, C₃H₈.

What is the function of ozone in the upper atmosphere?

What is meant by isomers?

Draw the structures for Ethanoic acid.

Draw the structures for Bromopentane*

Draw the structures for butanone.

Draw the structures for Hexanal.

How does ozone affect any ecosystem?

Why is damage to the ozone layer a cause for concern? What steps are being taken to limit this damage?

You have been selected to talk on 'ozone layer and its protection" in the school assembly on 'Environment Day.' 

(a) Why should ozone layer be protected to save the environment?
(b) List any two ways that you would stress in your talk to bring in awareness amongst your fellow friends that would also help in protection of ozone layer as well as the environment.

Explain why propane cannot exhibit the structural isomerism property.

Draw the structures of possible isomers of butane, C₄H₁₀.

Give reason why the carbon compounds generally have low melting and boiling points.