Question

SECTION-D

V. Answer in detail: 2x5=10



29. a. Write the information supplied by the given chemical equation and prove

the law of conservation of mass.

Ca + HCl CaCl2 + H2

(At.wt; – Ca-40, H-1, Cl-35)



(OR)

b. Balance the following chemical equations:

i. Si + HCl SiCl4 + .H2

ii. H2S + SO2 H2O + S

iii. Write any three information supplied by the given chemical formula.

Mg (OH)2 (At.wt – Mg-24, O-16, H-1)

30. a. i. Define electrolysis

ii. Draw and label the electrolysis of NaCl.

iii. Solid ionic compounds do not conduct electricity. Why?

(OR)



b. i. Define electroplating.

ii. During electroplating of an object with a copper metal, which acts as a

cathode, anode and an electrolyte

iii. Mention any two uses of electroplating.

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Answer 1

Answer:

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