TRUE / FALSE

Questions

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7 questions · timed · auto-graded

Question 11 Mark

Helium gas is used for filling electric bulbs.

Answer

False. Argon gas is used for filling electric bulbs.

Question 21 Mark

Nitrogen reacts with metals to form metal nitrides.

Answer

True.

Question 31 Mark

Carbon dioxide is heavier than air.

Answer

True.

Question 41 Mark

Carbon dioxide turns moist red litmus blue

Answer

False. Carbon dioxide turns moist blue litmus red.

Question 51 Mark

Rusting is a rapid oxidation reaction.

Answer

False. Rusting is a slow oxidation reaction.

Question 61 Mark

Potassium nitrate on heating decomposes into potassium nitrite and oxygen gas.

Answer

False. Potassium nitrate on heating decomposes into potassium nitrite and nitrogen gas.

Question 71 Mark

Asbestos fibre can cause a disease called silicosis.

Answer

True.

CHEMISTRY TRUE / FALSE