ICSE ICSE Class 8 - CISCE Question Bank Solutions

If an object is taken to the moon from the earth what will be its mass ?

Give reason for the following.

Electricity is not considered matter.

 Fill in the blank:

Matter is anything that has............. and occupies .............

State the law of conservation of mass.

Why is water used in hot-water bottles?

Give a reason why metals are arranged in a series called – ‘activity series of metals’. Name a metal which reacts with

(a) Cold water
(b) Boiling water
(c) Steam to liberate hydrogen in each case.

Give a balanced equation for the following conversion:

Iron to triiron tetroxide using steam.

State the ‘law of conservation of mass’.

Complete the statement given below by filling in the blanks with the correct words.

Atoms contain ________ with positively charged ________.

State the main points of Landolt’s experiment for experimental evidence of the law. 

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

In Landolt’s experiment – the form in which the chemical energy stored up in the reactants __________ is released.

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

The process of change of a liquid into vapour, [gas] on heating.

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

The law of conservation of mass is strictly valid if mass and _________ are considered together.

What is the effect on boiling point of water when pressure is increased?

What is the effect on boiling point of water when impurity is added.

Give reason for It is difficult to cook in hills compared to plain.

Give two examples of hydrated substances.

Give two examples for Efflorescent substance.

What do you observe when Washing soda is exposed to air ?

Define the Soft water.