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Class 6
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Fun with Dancing balls
Fun with Dancing balls
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1)
Baking soda is also known as -----------?
Sodium nitrate
Sodium bicarbonate
Sodium chloride
Sodium carbonate
2)
Name the gas which is evolved when baking soda reacts with vinegar?
Nitrogen
Carbon dioxide
Oxygen
Hydrogen
3)
Carbon dioxide is a chemical compound that is usually in the form of ---------?
Solid
Liquid
None of these
Gas
4)
Naphthalene balls are obtained from?
Plants
Coke
Minerals
Coal tar
5)
Name the non-flammable gas?
Methane
Carbon dioxide
Hydrogen
Ammonia
6)
Which of the following is used as a moth repellent?
Vinegar
Washing soda
Sodium bicarbonate
Naphthalene balls
7)
Life rafts and life jackets are inflated with -------?
Xenon
Argon
Carbon dioxide
Oxygen
8)
Which gas is used by plants to prepare their own food?
Nitrogen
Helium
Hydrogen
Carbon dioxide
9)
A chemical that is used in the production of plastics, resins, fuels, insecticides and dyes?
Naphthalene
Sodium
Calcium
Ammonia
10)
What is the reason behind the movement of naphthalene balls in the experiment?
Due to presence of Hydrogen
None of these
Due to the presence of Carbon dioxide
Due to absence of Oxygen