Metals and Non-Metals Worksheet-10

Metals and Non-Metals Worksheet-10

1. Metals react with water to form oxides or hydroxides and release ______ gas.

(a) hydrogen                                  (b) oxygen

(c) carbon dioxide                        (d) carbon monoxide

2. Metal which does not react even with steam:

(a) potassium   (b) iron               (c) magnesium (d) silver

3. Metals displace ___ from HCl and H₂SO₄.

(a) SO₂               (b) O₂                 (c) Cl₂                 (d) H₂

4. Which of the following is not a heavy metal?

(a) Cu                 (b) Hg                 (c) Pb                  (d) K

5. Metal reacts with oxygen and the moisture present in the air forming a layer of:

(a) oxide            (b) carbonate    (c) hydroxide    (d) any of these

6. Eating up of metals by the action of air, moisture or a chemical substance is called _____.

(a) reduction                                 (b) amalgamation

(c) oxidation                                  (d) corrosion

7. Rusting of iron takes place in the presence of:

(a) air and water                          (b) CO₂ and water

(c) O₂ and H₂                                (d) O₂ and N₂

8. Formation of green layer on the surface of copper utensils is due to ______.

(a) corrosion     (b) oxidation     (c) reduction     (d) none of these

9. Corrosion of metals can be prevented by ______.

(a) painting the surface of metals

(b) coating the surface of metal with oxygen

(c) treating the metal surface with dilute acid

(d) none of these

10. Iron is galvanised when it is dipped in:

(a) molten zinc                              (b) molten copper

(c) molten carbon                        (d) molten gold

11. As we go down in the metal reactivity series of metals, the reactivity:

(a) decreases and then increases

(b) increases and then decreases

(c) decreases

(d) increases

12. Metals are malleable and ductile because:

(a) metals can shine

(b) metals produce sound

(c) layers of metal atoms can slip over each other

(d) atoms form close clusters

13. The non-metal which is hard is:

(a) sulphur        (b) chlorine       (c) graphite       (d) diamond

14. The non-metal capable of gaining as well as losing an electron is:

(a) Hg                 (b) Ca                 (c) H₂                  (d) Au

15. Which of the following statement is true?

(a) All minerals are ores             (b) All minerals are not ores

(c) All ores are not minerals      (d) Some ores are minerals

Answer Key:

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