ICSE ICSE Class 8 - CISCE Question Bank Solutions

Give a balanced equation for the following conversion: [In one or two steps]

Calcium bicarbonate to calcium nitrate using a dilute acid.

Give a balanced equation for the following conversion: [In one or two steps]

Lime water [soln. of calcium hydroxide] to calcium bicarbonate.

Give a balanced equation for the following conversion: [In one or two steps]

Carbon dioxide to carbon.

Give a balanced equation for the following conversion: [In one or two steps]

A metallic oxide to calcium carbonate.

Complete the statement by filling the blank with the correct word from the option.

Adsorption capacity of wood charcoal is increased by passing ______ over wood charcoal, at high temperature.

Complete the statement by filling the blank with the correct word from the option.

______ Chemistry is the Chemistry of carbon compounds mainly of ‘Carbon’, ‘Hydrogen’ & ‘Oxygen’.

Complete the statement by filling the blank with the correct word from the option.

Sodium oxide combines with carbon dioxide to give _____

Give reason for the following:

It is dangerous to stand behind a running engine of a vehicle.

Give reason for the following:

Both CO₂ & SO₂ turn lime water milky. Moist potassium permanganate paper, helps in distinguishing the two gases.

Give a reason for the following:

Carbon monoxide and not carbon dioxide, is a highly poisonous gas.

Give reason for the following:

Lime water finds application for testing both carbon dioxide & carbon monoxide gas individually.

Differentiate between the terms – ‘Ion’ and ‘radical’ with suitable examples.

Explain the meaning of the term ‘matter’.

Explain the meaning of the term ‘matter’.

Differentiate between the-two characteristics of matter – ‘mass’ & ‘weight’.

Differentiate between the-two characteristics of matter – ‘mass’ & ‘weight’.

Complete the statement given below by filling in the blank with the correct word.

The basic unit of an element is a/an ________.

Complete the statement given below by filling in the blank with the correct word.

Element _______ has the symbol derived from its Latin name ‘plumbum’.

Select the correct answer from A, B, C, D & E for the statement given below:

An atom or group of atoms _________ having a resultant charge.

Select the correct answer from A, B, C, D & E for the statement given below:

An atom or group of atoms _________ having a resultant charge.