Q3 of 17 Page 157

Fill in the blanks

Solid carbon dioxide is also called …………..

Solid carbon dioxide is also called dry ice.

Explanation:


i. If a carbon is cooled at -57°C, it freezes.


ii. The carbon freezes at this temperature is called dry ice.


iii. Dry ice is used to decrease the temperature.


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3

Fill in the blanks

Some………….. substances absorb ………….. from the air.

 3

Fill in the blanks

It is mandatory to treat ……………. before letting them out.

 4

Match the following.

 5

Who am I?

(a) I am found in clouds and mist.


(b) I am used in aerated drinks.


(c) I am used in an electric bulb.


(d) I form 78% of air.


(e) I am used in the production of nitric acid.