Q. An alloy of lead and tin is called _______.
The correct answer was: Solder
Q. The most flexible metal is?
The correct answer was: Silver
Q. Coating steel and iron with a thin layer of zinc to prevent rusting is called?
The correct answer was: Galvanization
Q. Sodium hydrogen carbonate (NaHCO₃) is
The correct answer was: Baking Soda
Q. Calcium oxide reacts vigorously with water to produce _______.
The correct answer was: Slaked Lime
Q. The reaction of Iron (III) Oxide with _______ is used for joining railway tracks or broken machine parts.
The correct answer was: Aluminum
Q. Plaster of Paris is called _______.
The correct answer was: CaSO₄ ½ H₂O
Q. After two to three days of whitewashing, a compound is formed that gives a shiny finish to the walls.
The correct answer was: Calcium Carbonate
Q. The decomposition of vegetable matter in compost is an example of a _______ reaction.
The correct answer was: Exothermic
Q. Bleaching powder is produced by the action of chlorine on _______.
The correct answer was: Dry Slaked Lime
Q. When magnesium ribbon is burned in a bright white flame, it turns into a white powder. That powder is
The correct answer was: Magnesium Oxide
Q. The chemical formula of marble is
The correct answer was: CaCO₃
Q. Bronze is an alloy of copper and _______.
The correct answer was: Tin
Q. The oxide of _______ cannot be reduced by carbon.
The correct answer was: Al
Q. Zinc and lead are more reactive than _______.
The correct answer was: Copper
Q. Name the compound that is used to remove the permanent hardness of water.
The correct answer was: Sodium Carbonate
Q. The chlor-alkali process is used to produce _______.
The correct answer was: NaOH
Q. Our stomach produces _______ which helps in the digestion of food.
The correct answer was: Hydrochloric Acid
Q. Tooth enamel, the hardest substance in our body, is made of
The correct answer was: Calcium Phosphate
Q. When fats and oils are ________, they become rancid and their smell and taste change.
The correct answer was: Oxidized
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