EASY
Earn 100

What happens when water is added to sulphuric acid?

Important Questions on Heat and Temperature

MEDIUM
The panting of dogs is observed on a hot day. Explain the reason behind it.
MEDIUM
Doctors clean the skin with spirit before giving an injection. Why does that place feel cold?
MEDIUM

Look at the pictures given below. Write solid, liquid and gas under its matching molecular arrangement. Answer the question based on these pictures.

Name the process involved by which A changes into C.

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MEDIUM
To save milk from going stale we boil it many times or keep it in the refrigerator. Why?
MEDIUM
While sweating, contact with air makes us feel cool. Why?
EASY
To keep the body warm there is dense _____ on the body of polar bear.
EASY

Write the quadrants in which the following points lie:

-4,7

MEDIUM

During summers, water in a pitcher made up of smooth black soil does not become as cool as in the pitcher made of red soil. Why?

MEDIUM
Why we leave some space between two rail tracks while joining it.
MEDIUM

What are the conditions required for burning to occur?

 

EASY
Give few examples of effects of heat seen in our daily life.
EASY

State whether the following statement is true or false.

To keep the body cool there is dense fur on the body of the polar bear.

MEDIUM
State True or False. If false, correct the statement.

The applied heat energy can be realized as an increase in the average kinetic energy of the molecules. 

MEDIUM
In summers to keep the water cool, we keep it in pitchers made up of red soil and not in metal pitchers. Why?
EASY
If you apply some heat energy to a substance, which of the following can take place in it?
MEDIUM
Explain expansion of gases through an activity?
EASY
Which of the following is the effect of heating?