Class 8 Coal and Petroleum
When an oil well is drilled through rocks, what comes out first?

Class 7 Acids, base and Salt
The chemical name of "oil of Vitrol" is

Class 8 Combustion and flame
Which one of the following has the highest calorific value?

Class 8 Nutrition in Animals
Which of the following is not a part of digestive system ?

Class 7 Changes Around Us
Rust is chemically

Class7 Fibre to fabric
The rearing of silkworm to gather silk is known as

Class 8 Coal and Petroleum
Which of the following is not a fossil fuel?

Class 7 Physical and chemical changes
Baking of dough into bread is a kind of change

Class 8
Combustion and Flame
Coal burns with

Class 7
Electricity circuits and their components
Which of the following components is used to store electrical energy?

Class 8 Friction
If we apply oil on door hinges,the friction will

Class7 Heat
__ is a measure of the degree of hotness of the object.

Class8 Reproduction in Animals
After fertilization,the resulting cell which gives rise to a new individual is the

Class7 Life Process in plants
Which of the following is known as the ‘Food factories’ of plants?

Class 8 Synthetic fibres and plastic
Which of the following has the cross-linked polymer chain?