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