Metal And Its Compounds - Study Mode

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[#136] Choose odd from the following.

(A) Mercury

(B) Mercury or quick silver

(C) Hydrargyrum

(D) Bromos

Correct Answer

(D) Bromos

[#137] How many water molecules are present in a molecule of ferrous sulphate crystal?

(A) 8

(B) 6

(C) 5

(D) 7

Correct Answer

(D) 7

[#138] . . . . . . . . atoms are present in sodium carbonate molecule.

(A) 6

(B) 8

(C) 5

(D) 7

Correct Answer

(A) 6

[#139] What is the chemical formula of bleaching powder?

(A) Ca(OH) 2

(B) CaOCl 2

(C) CaCl 2

(D) CCl 4

Correct Answer

(B) CaOCl 2

[#140] Which of the following reactions removes the highly reactive metals from the pure molten ore?

(A) Reduction by appropriate agent

(B) Electrolysis

(C) Calcination

(D) Roasting

Correct Answer

(B) Electrolysis