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

Write a correctly balanced equation for the following:

When steam is passed over red hot iron.

Explain the following:

Two jars of H₂ are collected – “one burns quietly and the other does not”.

Write correctly the balanced equation for the following:

‘When zinc filings are added to a concentrated solution of sodium hydroxide’.

Describe one chemical test applied to the following gases, which would enable you to distinguish between them :‘carbon monoxide and hydrogen’.

Write down the “word equation” for the following reaction:

sodium hydroxide solution + zinc → ?

What do you observe when a piece of sodium is dropped into cold water?

How would you obtain ‘hydrogen from sodium hydroxide’ solution other than by electrolysis?

Complete and balance the following equations:

Al + NaOH + ____ → ____ + ____

What do the following symbols represent : 2H and H₂.

Write balanced equation of the reaction in the preparation of : hydrogen from a solution of potassium hydroxide [other than by electrolysis].

Describe briefly, with equations, the Bosch Process for the large scale production of hydrogen.

Give balanced equation for obtaining hydrogen from cold water using a monovalent active metal.

Give balanced equation for obtaining hydrogen from cold water using a divalent active metal.

Name or state following with reference to the element of the first three periods of the periodic table.

The noble gas having an electronic configuration 2, 8, 8.

Give a reason for the following.

A mixture of hydrogen and chlorine can be separated by passage through a porous pot.

Select the correct answer from the symbol in the bracket.

The element, which like hydrogen has one valence electron.

Write any five uses of salts.

This question refers to elements of the periodic table with atomic numbers from 3 to 18. In the table below, some elements are shown by letters, even though the letters are not the usual symbols of the elements.

Which of these is:

1. a noble gas?
2. a halogen?
3. an alkali metal?
4. an element with valency 4?

This question refers to elements of the periodic table with atomic numbers from 3 to 18. In the table below, some elements are shown by letters, even though the letters are not the usual symbols of the elements.

If A combines with F, what would be the formula of the resulting compound?

This question refers to elements of the periodic table with atomic numbers from 3 to 18. In the table below, some elements are shown by letters, even though the letters are not the usual symbols of the elements.

What is the electronic configuration of G?