| | - Teacher Name : Rakesh
- Total Questions : 15
- Time Allowed : 60
- Total Marks : 15
Q 1 :Which of the following are characteristics of a physical change? Q 2 :How can we test the presence of carbon dioxide gas? Q 3 :Why does a candle covered with a glass tumbler stop burning after some time? Q 4 :Melting of wax is necessary for burning a candle. Q 5 :Which gas is formed when a candle burns inside a glass tumbler? Q 6 :What is the best way to extinguish fire if a person's clothes catch fire? Q 7 :The light produced by fireflies is called: Q 8 :Which of the following are necessary for combustion? Q 9 :Which instrument is used to focus sunlight on paper? Q 10 :What is the minimum temperature at which a substance catches fire called? Q 11 :Drawing water from a well is a: Q 12 :Which component of air supports combustion? Q 13 :What happens when carbon dioxide is passed through lime water? Q 14 :Ripening of fruits is a: Q 15 :Collecting water vapour by condensing involves a chemical change.
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