Miscellaneous And Useful Chemical Compounds (Part-V)

41. The common name of calcium hydroxide is [S.S.C. Online MTS (T-I) 19.09.2017 (Shift-III)]

(a) Plaster
(b) Slaked lime
(c) Eating soda
(d) Washing soda

Correct Answer: (b) Slaked lime

Solution:Calcium hydroxide Ca(OH)₂ is also called slaked lime. It is made by the reaction of calcium oxide with water.

42. What is baking soda? [S.S.C. Online CHSL (T-I) 7.01.2017 (Shift-I)]

(a) Aluminium Bicarbonate
(b) Sodium Isolate
(c) Sodium Bicarbonate
(d) Aluminium Sulphate

Correct Answer: (c) Sodium Bicarbonate

Solution:The chemical name of baking soda is sodium bicarbonate. Its chemical formula is NaHCO₃. It is also called ‘Baking Soda’ because it is used in the bakery industry to make bread, etc.

43. NaHCO₃ is the chemical formula for: [S.S.C. Online CHSL (T-I) 1.02.2017 (Shift-II)]

(a) Borax
(b) Vinegar
(c) Lime
(d) Baking soda

Correct Answer: (d) Baking soda

44. The common name of Sodium Bicarbonate is [S.S.C. Online CHSL (T-I) 20.01.2017 (Shift-II)]

(a) Baking soda
(b) Borax
(c) Bleach
(d) Epsom salt

Correct Answer: (a) Baking soda

45. Complete the statement: Sodium hydrogen carbonate is used [S.S.C. Online MTS (T-I) 11.10.2021 (Shift-II)]

(a) as a cleaning agent for domestic purposes
(b) for removing permanent hardness of water
(c) in the manufacture of borax
(d) in soda-acid fire extinguishers

Correct Answer: (d) in soda-acid fire extinguishers

Solution:Sodium hydrogen carbonate is used in soda-acid fire extinguishers.

46. Which mineral is present in rock salt? [S.S.C. Online C.P.O.S.I. (T-I) 3.07.2017 (Shift-II)]

(a) Gypsum
(b) Sodium
(c) Potassium
(d) Magnesium

Correct Answer: (b) Sodium

Solution:The chemical formula of common salt, rock salt, and sea salt is NaCl. It mainly contains sodium (Na) minerals.

47. Which of the following is one of the main active sulphur-containing compounds present in garlic and onion? [S.S.C. Online MTS (T-I) 11.10.2021 (Shift-I)]

(a) Ethanol
(b) Cellulose
(c) Phenol
(d) Allicin

Correct Answer: (d) Allicin

Solution:Allicin is the main active sulfuric compound present in garlic and onion. It is also called 'Dialyl Thiosulfinate.'

48. Which of the following is also known as Epsom salt? [S.S.C. Online Graduate Level (T-I) 5.03.2020 (Shift-III)]

(a) Sodium Sulphate
(b) Ferrous Sulphate
(c) Magnesium Sulphate
(d) Calcium Sulphate

Correct Answer: (c) Magnesium Sulphate

Solution:The chemical name of Epsom salt is magnesium sulfate (MgSO₄). It is a white crystalline substance and is soluble in water.

49. National Chemical Laboratory (India) is located at— [C.P.O. S.I. 5.06.2016 (Shift-II)]

(a) Mumbai
(b) Bangalore
(c) Hyderabad
(d) Pune

Correct Answer: (d) Pune

Solution:National Chemical Laboratory is located in Pune (Maharashtra).

50. Kinetics is the study of? [C.P.O. S.I. 5.06.2016 (Shift-I)]

(a) rate of chemical reaction
(b) how fast the reaction takes place.
(c) Mechanism and pathway of molecules to incorporate products from a reactant
(d) All are true

Correct Answer: (d) All are true

Solution:In physics and engineering, kinetics is the branch of classical mechanics that is concerned with the relationship between motion and its causes, specifically, forces and torques. The term kinetics is also used to refer to chemical kinetics, particularly in chemical physics and physical chemistry.