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Redox Reactions

Short Answer Type

11.

Write formulas for the following compounds:
(a) Mercury (II) chloride
(b) Nickel (II) sulphate
(c) Tin (IV) oxide
(d) Thallium (I) sulphate
(e) Iron (III) sulphate
(f) Chromium (III) oxide

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12. What are electrolytes?

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13. What are cations and anions?

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14. What is electrolysis?

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15. Mention two uses of electrolysis.

(i) Extraction of metals from ores.
(ii) Electroplating of articles.

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16. In the reaction:

SO subscript 2 space plus space 2 straight H subscript 2 straight S space space rightwards arrow space space space space 3 straight S space plus space 2 straight H subscript 2 straight O

name the substance oxidised?

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17. In the reaction:

space space space space space space 3 Cl subscript 2 space plus space 6 NaOH space space rightwards arrow space space space space NaClO subscript 3 space plus space 5 NaCl space plus space 3 straight H subscript 2 straight O

mention the element which losses as well as gains electrons.

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18.

Define oxidation number of an element.

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19.

Differentiate between an ion and an atom.

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20.

Is the valency of an element same as its oxidant number?

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