MISCELLANEOUS AND USEFUL CHEMICAL COMPOUNDS (Part-II)

Total Questions: 50

11. What is the process of seepage of water into the ground called? [S.S.C. Online MTS (T-I) 16.09.2017 (Shift-I)]

Correct Answer: (a) Infiltration
Note:

Infiltration is the process by which ground surface water enters the soil. Through this process, the water-absorbing capacity of the soil is ascertained.

12. Calcium salts used as fertilizer is: [S.S.C. Online Graduate Level (T-I) 31.08.2016 (Shift-II)]

Correct Answer: (d) Calcium Sulphate
Note:

Calcium sulfate (gypsum) is an important agriculturally useful compound, which is used with fertilizers. Plants get both calcium and sulfur, important elements, through calcium sulfate. Calcium stimulates the growth of root hairs. Due to the lack of this element, chlorophyll does not work properly. Sulfur helps in the development of roots. In the absence of this element, the leaves start turning yellow and the size of the leaves decreases, and the plants remain dwarf. ​

13. Which gas is used in the food packaging to prevent chips from oxidizing? [S.S.C. Online MTS (T-I) 16.08.2019 (Shift-III)]

Correct Answer: (a) Nitrogen
Note:

In the food packaging industry, the chips are filled with nitrogen gas by taking oxygen out of the packets to prevent them from oxidizing, as the nitrogen does not interact directly with the food item and thus the food remains preserved.

14. The common name of Lead (II) Sulphide is [S.S.C. Online CHSL (T-I) 27.01.2017 (Shift-II)]

Correct Answer: (c) Galena
Note:

The common name for lead(II) sulfide is galena. It is an important mineral of lead and is also an excellent source of silver. Its chemical formula is PbS.

15. Compounds with exactly two double carbon-carbon bonds are known as [S.S.C. Online CPO SI (T-I) 10.11.2022 (Shift-II)]

Correct Answer: (b) Dienes
Note:

Compounds with exactly two double carbon-carbon bonds are known as dienes. Dienes are a type of unsaturated hydrocarbon and are also called butadienes. The simplest diene is 1,3-butadiene, which consists of a chain of four carbon atoms and two double bonds between the first and second carbon atoms and between the third and fourth carbon atoms. Dienes can be used as monomers in the production of synthetic rubbers such as neoprene and styrene-butadiene rubber.

16. Activated Charcoal is used to remove coloring matter from pure substances by [S.S.C. Online Graduate Level (T-I) 29.08.2016 (Shift-III)]

Correct Answer: (c) Adsorption
Note:

Activated charcoal has the property of adsorption, due to which it separates the colored impurities found in pure substances by adsorbing on its surface. In this way, such substances come in completely pure form.

17. The most pure form of carbon among the options is [S.S.C. Online Graduate Level (T-I) 29.08.2016 (Shift-I)]

Correct Answer: (a) Anthracite
Note:

Anthracite is the hardest, brightest, and best form of coal. It has a carbon content of 90-95%. 55-80% carbon is found in bituminous, 40-55% in lignite, and less than 40% in peat coal.

18. Which is the highest hard coal of the below? [S.S.C. Online Constable GD 18.02.2019 (Shift-I)]

Correct Answer: (d) Anthracite
Note:

Anthracite is the hardest, brightest, and best form of coal. It has a carbon content of 90-95%. 55-80% carbon is found in bituminous, 40-55% in lignite, and less than 40% in peat coal.

19. Highest percentage of carbon is found in which form of coal? [S.S.C. Online Graduate Level (T-I) 3.09.2016 (Shift-III) S.S.C. Online Graduate Level (T-I) 8.09.2016 (Shift-I)]

Correct Answer: (a) Anthracite
Note:

Anthracite is the hardest, brightest, and best form of coal. It has a carbon content of 90-95%. 55-80% carbon is found in bituminous, 40-55% in lignite, and less than 40% in peat coal.

20. Peat coal has _____ carbon and _____ moisture content. [S.S.C. Online CGL (T-I) 13.12.2022 (Shift-II)]

Correct Answer: (b) Low, High
Note:

Peat coal has low carbon and high moisture content. There are four different types of coal: Peat, lignite, bituminous coal, and anthracite. Peat is a precursor to coal. Another name for lignite coal is brown coal. Bituminous coal has high heating (Btu) value, and anthracite is also called hard coal.