Metals and Non-Metals Worksheet-11

Metals and Non-Metals Worksheet-11

1. Gold is mixed with copper to:

(a) make gold soft                        (b) make gold hard

(c) make gold more yellowish   (d) give gold luster

2. A thin layer of tin or chromium can be deposited over iron or steel objects by:

(a) electroplating                          (b) galvanization

(c) electrolysis                               (d) all of these

3. Which of the following statement is CORRECT?

(a) All metals are ductile

(b) All non-metals are ductile

(c) Generally, metals are ductile

(d) Some non-metals are ductile

4. The metals which are soft and can be cut by a knife:

(a) sodium and magnesium      (b) strontium and sodium

(c) sodium and potassium         (d) magnesium and strontium

5. In the given reaction:

(a) carbon is reduced

(b) metal oxide is oxidized

(c) metal oxide is reduced to metal

(d) none of these

6. Which of the following reactions cannot occur?

(a) Fe + CuSO₄ → FeSO₄ + Cu

(b) Zn + FeSO₄ → ZnSO₄ +Fe

(c) Fe + ZnSO₄ → FeSO₄ + Zn

(d) Both Fe + CuSO₄ → FeSO₄ + Cu & Zn + FeSO₄ → ZnSO₄ + Fe

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

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

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

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

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

8. Which of the following is odd?

(a) Phosphorus                             (b) Sulphur

(c) Sodium                                     (d) Carbon

9. Lalita takes a burning substance and collects the evolved vapours in a test tube and makes sure that they do not escape. A small amount of water is added to the test tube. To the solution obtained, a few drops of red litmus solution are added. The litmus solution turns blue. Which of the following could be the burning substance?

(a) Mg                                             (b) S

(c) Both Mg & S                            (d) None of these

10. An electrician always uses a screw driver having a wooden or plastic handle. Why?

(a) Wood and plastic are poor conductors of electricity

(b) Wood and plastic are good conductors of electricity

(c) Wood alone is a poor conductor of electricity and not plastic

(d) Plastic alone is a poor conductor of electricity and not wood.

11. Carefully read and select the appropriate option.

(a) I is copper; II is sulphur       (b) II is sulphur; II is coal

(c) III is Iron; IV is copper.        (d) II is sulphur; IV is copper

12. Materials 'X' and 'Y' in the figure are

(a) X-Aluminium foil, Y-Pencil lead

(b) X-Pencil lead, Y-Copper block

(c) X-Pencil lead, Y-Wooden block

(d) X-Copper block, Y-Pencil lead

13. Why is it that we never find bells made up of wood?

(a) Wooden bells are expensive

(b) Wood is not sonorous

(c) Wood is ductile

(d) None of these.

14. The property of metals due to which they can be drawn into wires is called ______

(a) Conductivity                            (b) Malleability

(c) Ductility                                   (d) Density

15. Care must be taken while storing phosphorus. It is stored in water, because

(a) Phosphorus is a very reactive non-metal

(b) It catches fire when exposed to air

(c) Both Phosphorus is a very reactive non-metal & It catches fire when exposed to air

(d) None of these

Answer Key:

(1)-(b); (2)-(a); (3)-(c); (4)-(c); (5)-(c); (6)-(c); (7)-(b); (8)-(c); (9)-(a); (10)-(a); (11)-(d); (12)-(c); (13)-(b); (14)-(c); (15)-(c)