Which of these gases is produced on addition of Baking soda to food items?
[A] Helium
[B] Hydrogen
[C] Carbon dioxide
[D] Nitrogen

Which of the following gas is responsible for burning of eyes when we cut an onion?
[A] Chlorine
[B] Helium
[C] Sulphur
[D] Methane

Which is the most abundant metal in the Earth’s crust?
[A] Iron
[B] Aluminium
[C] Copper
[D] Silicon

Which of these non-metals is mainly used as an inert shielding gas?
[A] Xenon
[B] Hydrogen
[C] Argon
[D] Krypton

Which of these chemical is used to form soaps containing sodium salts?
[A] Sulphuric acid
[B] Sodium hydroxide
[C] Nitric acid
[D] Carbonic acid

Which of the following is used as a food preservative?
[A] Table salt
[B] Salts of sorbic acid
[C] Sodium benzoate
[D] All of the above

Which of the following elements is present in heavy water?
[A] Heavy Oxygen
[B] Heavy Hydrogen
[C] Heavy Chlorine
[D] Heavy Nitrogen

Chewing gum is made from which of the following?
[A] Resin
[B] Polystyrene
[C] Polyvinyl acetate
[D] Latex

Which among the following metals is used for galvanization?
[A] Zinc
[B] Copper
[C] Silver
[D] Iron

Which of the following gases is heavier than oxygen?
[A] Ammonia
[B] Methane
[C] Helium
[D] Carbon dioxide

Which of the following is the process of loosing electrons?
[A] reduction
[B] oxidation
[C] both oxidation and reduction
[D] radiation