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Monday, 14 September 2015

METALS AND NON – METALS test paper 2

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Metal and non metals 
MARKS-30                                                   TIME- 70 MINUTES
 Questions : 1 to 5 – 1 Mark each
 Questions : 6 to 9 – 2 Marks each
 Questions : 10 to 13 – 3 Marks each
 Question 14 – 5 Marks

1. Give 2 examples of amphoteric oxides.

2. Why Sodium chloride has high melting point?

3. How do metals & non metals combine?

4. What is aqua-regia?

5. What is the nature of oxides of non metal?

6. Give reasons for the following:
 Why Aluminium cannot be obtained by reduction of its oxide with coke?
 Metals can be beaten into sheets whereas non metals cannot.

7. Write the equations for the reactions of:
 Magnesium with Zinc sulphate.
 Sodium with water.

8. Out of copper and iron, which one is more is more reactive? How can you test it?

9. What is the difference between roasting and calcination process? Give an example of each

10. Draw a labelled diagram of – Electrolytic refining of Copper

11. Write three properties of covalent compounds.

12. Explain how a metal high in the activity series can be extracted. Write suitable example.

13. Give reasons:
 Copper is used to make electrical wires.
 Silver is used to make jewellery.
 Metals are considered electropositive.

14. (i) A metal ‗M‘ has the electronic configuration 2,8,3 and occurs in nature as M2O3. It is more reactive than Zinc. Answer the following questions-
(a) Name the metal ‗M‘.
(b) Name the ore from which it is extracted. 
(c) How is the metal oxide converted to metal?
(ii) Why do Gallium and Caesium melt in our palms?

metal non metal,fa,test paper ,metalloid ,important questions for class10 chemistry cbse,

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