CBSE Class 10 Chemistry Metals And Non Metals Worksheet Set K

 

Metals & Non-metals

Multiple Choice questions

1. The poorest conductor of heat among metals is

(a) Lead

(b) Mercury

(c) Calcium

(d) Sodium

2. Al₂O₃ + 2NaOH → …… + H₂O

(a) Al (OH)₃

(b) Na₂O

(c) NaAlO₂

(d) AlNaO₂

3. Which of the following pairs will give displacement reactions?

(a) FeSO₄ solution and Copper metal

(b) AgNO₃ solution and Copper metal

(c) CuSO₄ solution and Silver metal

(d) NaCl solution and Copper metal

4. Which of the following oxide(s) of iron would be obtained on reaction of iron with steam?

(a) FeO

(b) Fe₂O₃

(c) Fe₃O₄

(d) Fe₂O₃ and Fe₂O₄

5. Which of the following are ionic compounds?

(i) KCl

(ii) HCl

(iii) CCl₄

(iv) NaCl

(a) (i) and (ii)

(b) (ii) and (iii)

(c) (i) and (iv)

(d) (i) and (iii)

6. Example of an amphoteric oxide is:

(a) Na₂O

(b) K₂O

(C) Al₂O₃

(d) MgO

7. Which one among the following is an acidic oxide?

(a) Na₂O

(b) CO

(c) CO₂

(d) Al₂O₃

8. Which of the following non-metal is lustrous?

(a) Sulphur

(b) Oxygen

(c) Nitrogen

(d) Iodine

9. An element ‘X’ is yellow coloured solid, insoluble in water but soluble in carbon disulphide. It has low melting point 114.5°C. It boils at 445°C and it bums with pale blue flame forming pungent smelling gas ‘Y’ which turns moist blue litmus red. ‘X’ and ‘Y’ are

(a) C, CO₂

(b) N, NO₂

(c) S, SO₂

(d) I₂, I2O₅

10. Which one of the following metals do not react with cold as well as hot water?

(a) Na

(b) Ca

(c) Mg

(d) Fe

11. Which one of the following properties is not generally exhibited by ionic compounds?

(a) Solubility in water

(b) Electrical conductivity in solid state

(c) High melting and boiling points

(d) Electrical conductivity in molten state

12. Which of the following metals exist in their native state in nature?

(i) Cu (ii) Au (iii) Zn (vi)Ag

(a) (i) and (ii)

(b) (ii) and (iii)

(c) (ii) and (iv)

(d) (iii) and (iv)

Fill in the blanks

13.Two examples of metals which are poor conductors of heat are ………, ……….

14. Two metals which melt when kept on the palm are ………, ……….

15. A non-metal which is a good conductor of electricity is ……….

16. Metals can form positive ions by ……….

17. A metal which burns in air with a dazzling white flame is ……….

18.Metals which are so soft that they can be cut with a knife are ………, ………, ………

19.Electrical wires have a coating of an insulating material. The material generally used is………….

20.Name the liquid non-metal…………

21.Water soluble hydroxides of metals are known as ……….

22.The electrostatic force of attraction which holds the oppositely charged ions are called………. bond.

23. Common salt conducts electricity either in molten state or in aqueous solution due to the ……... of ions.

24. Gold and platinum dissolve in ………………. which is a mixture of conc. HCl and conc.HNO₃in the ratio of…………….by volume.

25………….is a process of forming a thick oxide layer of aluminium.

 

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