inorganic chemistry - Category wise Question and Answer Practice Test with Solutions

inorganic chemistry PRACTICE TEST [2 - EXERCISES]

set 1

set 2

Question : 11

Food cans are coated with tin and not with zinc because

a) zinc is more reactive than tin

b) zinc has a higher melting point than tin

c) zinc is costlier than tin

d) zinc is less reactive than tin

Answer: (a)

Question : 12

While tinning of brass utensils, the ammonium chloride powder used to clean the hot utensil produces fumes of

a) hydrochloric acid

b) carbon monoxide

c) ammonia

d) ammonia and hydrochloric acid

Answer: (d)

It produces fumes of ammonia and hydrochloric acid.

Question : 13 [UPPCS (Pre) 2007]

Which of the following is the most common element in the Universe?

a) Hydrogen

b) Nitrogen

c) Oxygen

d) Carbon

Answer: (a)

Question : 14

Select the correct statements:

  1. Plants use CO2 during the process of photosynthesis
  2. CO2 dissolved in water reacts with limestone present in rocks to form A which is absorbed by marine animals. Compound A helps in the formation of shells by marine animals.
  3. The % of oxygen in the air dissolved in water is about 32- 35%.
  4. Aquatic animals use dissolved oxygen to respire.

a) 1, 3 and 4

b) 2 and 4

c) 1, 2 and 3

d) 1, 2, 3 and 4

Answer: (d)

Question : 15

Which of the statements given below is/are correct?
The permanent hardness of water is due to the presence of soluble.

  1. chloride of calcium
  2. bicarbonate of calcium
  3. sulphate of magnesium
  4. bicarbonate of magnesium
Select the correct answer using the codes given below:

a) 2 and 4

b) 1 and 3

c) 1 only

d) 1, 2 and 3

Answer: (b)

Chlorides and sulphates of calcium and magnesium are responsible for the permanent hardness of the water.

Note: Bicarbonates are responsible for the temporary hardness of the water.

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