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

Explain briefly how hydrogen is manufactured on a large scale, from steam.

State the products of the reaction “when steam is passed over red-hot iron”.

How can you obtain hydrogen from a mixture of hydrogen and carbon monoxide?

How are the unreacted gases separated out in ‘Bosch process’ in the manufacture of hydrogen.

Write a short note on the following type of element –

transition elements

Write a short note on the following type of element –

inner transition elements

Write a short note on the following type of element –

normal elements

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

The periods which contain the inner transition elements.

What is green house effect?

When stating the volume of a gas, the pressure and temperature should also be given. Why?

Is it possible to change the temperature and pressure of a fixed mass of a gas without changing its volume? Explain your answer.

Give the formula and valency of:

Give the formula and valency of:
chromate ………….…….. .

Give the formula and valency of:
aluminium ………………. .

Give the formula and valency of:
cupric  ………………… . 

Complete the following statement by selecting the correct option :

The correct formula of aluminium oxide is

Fill in the blank:

Formula of iron (ill) carbonate is _____ .

Correct the following statement:

A molecular formula represents an element.

Correct the following statement:

Molecular formula of water is H₂O₂