Question

(Use Cordova Smart Class Software on the smart board in dass to do these
7
We can see air.
(a)
cont It is because of heating up of air above the candle flame. Thus, hot air being
and displaces the heavier cold air from the left side paper bag. The left
Candhuston: Hot air is lighter than cold air.
od of wooden stick becomes lighter and moves up.
ercise For Revision
Tick ( the correct answers.
Which of the following is correct?
Which of the following gases is/are present in air?
Which of the following gases supports burning?
(b) We can touch air.
(d) We can feel air.
(d) all of these
(b) water vapour
(d) carbon dioxide
Which of the following is not a property of air?
(b) It contracts on cooling.
(d) It has weight.
(@) We can smell air.
(b) oxygen
(a) nitrogen
1 (
(c) argon
(a) oxygen
c) nitrogen
b) It expands on heating.
) It does not support burning.
the blanks.
E 문​

Answer 1

Answer:

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