HARD
7th CBSE
IMPORTANT
Earn 100
When Vasu was running high temperature, his mother was nursing him by placing a wet cloth on his forehead till the temperature had gone down. Justify what purpose did the mother’s action serve.
Important Questions on Classification of Matter
HARD
7th CBSE
IMPORTANT
A student has a mixture consisting of charcoal and sulphur powder. He adds a certain reagent where he observes that one of the components goes into the solution state. Name the techniques by which the components can be separated.
HARD
7th CBSE
IMPORTANT
Mother took her two daughters Bhavani and Shivani to a swimming pool in summer vacation. They both enjoyed swimming hours together. When they came out of swimming pool, both were shivering and fighting for the towel. Explain the reason for their shivering immediately after they came out of the swimming pool.
HARD
7th CBSE
IMPORTANT
How is milk powder prepared from milk?
HARD
7th CBSE
IMPORTANT
Which characteristic property of mercury is exploited in its usage as a thermometric liquid? Is there any preferable metal for use in high-temperature thermometers? Justify.
HARD
7th CBSE
IMPORTANT
Why is mercury used in a thermometer? Is it suitable for measuring high temperatures? Name the liquid which can be used for the measurement of high temperatures. Give reasons.
HARD
7th CBSE
IMPORTANT
Two thermometers A and B are dipped in water and alcohol, respectively taken in two containers of similar dimensions at room temperature. Compare the temperatures shown by these two thermometers giving appropriate reasons.
HARD
7th CBSE
IMPORTANT
Naturally occurring diamonds are sometimes found in different colours. Give reasons.
