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

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

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

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

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

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

a) 2 and 4

b) 1 and 3

c) 1 only

d) 1, 2 and 3