Metals and Non-Metals Worksheet-12

Metals and Non-Metals Worksheet-12

1. In the figure, X and Y respectively are

(a) Zn and ZnSO₄                         (b) ZnSO₄ and Zn     

(c) Zn and CuSO₄                         (d) Zn and Cu

2. Match both the columns and select the correct option from the codes given below.

(a) (A)-(II), (B)-(III), (C)-(I), (D)-(IV)

(b) (A)-(III), (B)-(I), (C)-(IV), (D)-(II)

(c) (A)-(I), (B)-(II), (C)-(III), (D)-(IV)

(d) (A)-(IV), (B)-(III), (C)- (II), (D)-(I)

3. Your mother takes out an old copper pan and finds that it has become dull and green in colour. What do you think the green colour is due to?

(a) Cu(OH)₂                                   (b) CuCO₃

(c) Cu(OH)₂ + CuCO₃                 (d) CuO + CuCO₃

4. A metal piece is dropped in a test tube containing dil. H₂SO₄, when a burning matchstick is brought near the mouth of the test tube, a pop sound is heard. The sound is produced due to

(a) Evolution of O₂ gas                (b) Evolution of H₂ gas

(c) Evolution of SO₂ gas              (d) Evolution of CO₂ gas

5. When metals react with oxygen they form ______ oxides and when non-metals react with oxygen they from ______ oxides.

(a) Acidic; basic                            (b) Basic; acidic

(c) Acidic; acidic                          (d) Basic; basic

6. Which of the following is the most appropriate order for the reactivity of metals towards mineral acids?

(a) Ag > Mg > Zn > Cu               (b) Cu > Zn > Ag > Mg

(c) Zn > Cu > Mg > Ag                (d) Mg > Zn > Cu > Ag

7. Read the following statements carefully and identify X, Y and Z respectively.

(i) X reacts violently with cold water.

(ii) Y reacts with boiling water.

(iii) Z reacts with steam.

(a) Na, Mg, Cu                              (b) Na, Zn, Fe

(c) Cu, Zn, Na                               (d) Zn, Cu, Na

8. When rust is dissolved in water and the solution is tested with litmus, which of the following would you observe?

(a) Red litmus turns blue

(b) No change in red litmus paper

(c) Blue litmus turns red

(d) Blue litmus turns green.

9. The same gas is evolved when Al reacts with H₂SO₄ and NaOH. The gas is

(a) N₂                  (b) O₂                 (c) H₂                  (d) None of these

10. Which of the following statements is true?

(a) Metals do not possess lustre

(b) Mercury is not sensitive to heat changes

(c) Metalloids possess characteristics of both metals and non-metals

(d) Most of the elements known are non-metals.

11. The oxide of sulphur (which can be further oxidized) when dissolved in water gives

(a) H₂S                                            (b) H₂SO₃

(c) H₂SO₄                                       (d) Both H₂S & H₂SO₃

12. When one touches a hot metallic pan without a wooden or plastic handle, one gets hurt, because

(a) Metals are good conductors of heat

(b) Plastic and wood are insulators

(c) Both Metals are good conductors of heat & Plastic and wood are insulators

(d) None of these.

13. Study the following table carefully and select the correct option.

(a) X-S; Y-Na; Z-K                       (b) X-Na; Y-S; Z-K

(c) X-K; Y-Na; Z-S                       (d) X-S; Y-K; Z-Na

Answer Key:

(1)-(d); (2)-(b); (3)-(c); (4)-(b); (5)-(b); (6)-(d); (7)-(b); (8)-(a); (9)-(c); (10)-(c); (11)-(b); (12)-(a); (13)-(b)