(English Medium) ICSE Class 9 - CISCE Question Bank Solutions

Name and state the following with reference to the elements of the first three periods of the periodic table.

Typical elements of Groups 14 and 15.

On heating which of the following substances i.e. copper carbonate, zinc carbonate, washing soda, copper sulphate, zinc nitrate, copper nitrate, lead nitrate, ammonium chloride and ammonium dichromate – relate to the reaction given below.

A white crystalline solid which decrepitates on heating leaving a residue which fuses with the glass and evolves two gases one of which is coloured and acidic.

On heating which of the following substances i.e. copper carbonate, zinc carbonate, washing soda, copper sulphate, zinc nitrate, copper nitrate, lead nitrate, ammonium chloride and ammonium dichromate – relate to the reaction given below.

An amorphous substance which turns from pale green to black on strong heating evolving a colourless, acidic gas as the only gaseous product.

Covalent bonds can be single, double or triple covalent bonds. How many electrons are shared in each? Give an example of each type.

Taking MgCl₂ as an electrovalent compound, CCl₄ as a covalent compound, give four difference between electrovalent and covalent compounds

Potassium chloride is an electrovalent compound, while hydrogen chloride is a covalent compound, But, both conduct electricity in their aqueous solutions. Explain.

Define a covalent bond.

Give an example of the covalent bond formed by

(i) Similar atoms (ii) Dissimilar atoms 

In the formation of electrovalent compounds, electrons are transferred from one element to another. How are electrons involved in the formation of a covalent compound?

State in brief, the preventive steps to control the pollution of water bodies in the locality. 

Explain the methods of controlling water pollution.

Molecular reactions are ______ in the covalent compound.

______ & ______ atoms have similar electronegativities.

Write a composition (300 - 350 words) on the following:

Imagine a situation where a child runs away from home but later returns. Why did he or she run away? What made him/her come back? Write an original short story entitled: 'Finding My Way Home'.

Parents can never be friends with their children. Express your views either for or against this statement.

Write a composition (300 - 350 words) on the following:

Describe an area in your city or hometown which is famous for its street food. Give details of the familiar sights and sounds you would experience on this street.

Write a composition (300 - 350 words) on the following:

It is very important for young people to spend time quietly or alone for a short while every day. If you were given an hour to spend on your own, how will you spend it? What will you learn from the process?

Write a composition (300 - 350 words) on the following:

Study the picture given below. Write a short story or description or an account of what the picture suggests to you. Your composition may be about the subject of the picture or you may take suggestions from it.

You have been given a small sum of money to buy a gift with for a friend. What gift would you choose (specify) and why would you choose this? Write a letter to your friend telling him/her about the gift and how it will benefit him/her.