Question

1. Which of these is an acidic salt?
a. Ammonium chloride b. sodium chloride
c. Sodium carbonate
d. Potassium chloride
2. Which of the following is injected by bee sting?
a. Ethanol b. methanoic acid c. acetic acid d. acetone
3. Silver articles become black on exposure to air for long period due to formation of
a. AgzN b. Ag20 c. Ag2S d. AgzN and Ag2S
3. Which is an antacid used to treat acidity of stomach.
a. Milk of magnesia b. sodium hydroxide c. calcium hydroxide d. sodium acetate
5. The process of coating iron articles with zinc is called
d. Roasting
a. Rusting b. Refining c. Galvanisation
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Answer 1

Answer:

1. potassium chloride

2. acetic acid

3. (c)

4. acidity of stomach is treated by milk of magnesia

5. galvanisation