Questions
41
Which of the following is usually taken to counter constipation?
Answer: Milk of magnesia
42
Tooth enamel is made up of which of the following?
Answer: Calcium phosphate
43
A metal compound reacts with dilute hydrochloric acid to produce effervescence. The gas evolved extinguishes a burning candle. If one of the compounds formed is calcium chloride. Then, what’s the name of the metal compound?
Answer: Calcium carbonate
44
While mixing a strong concentrated acid/base, we must take care of which of the following?
1. The acid/base must always be added slowly to water rather than the other way around.
2. We must stir the solution slowly and constantly.
3. Protective goggles, gloves, and a lab coat should be worn.
4. The water must always be added to the acid/base rather than the other way around.
Answer: Only 1, 2 and 3 are correct
45
Which gas is usually liberated when an acid reacts with a metal?
Answer: Hydrogen
46
Copper chloride is a light brown solid, which slowly absorbs moisture to form a
Answer: Blue-green dihydrate
49
Which of the following do not conduct electricity?
1. Ethyl alcohol
2. Glucose
3. Water
Answer: All 1, 2 and 3
50
Common salt besides being used in kitchen can also be used as the raw material for making
i. soda
ii. bleaching powder
iii. baking soda
iv. slaked lime
Answer: (i) and (iii)
