Metals and Non-Metals Worksheet-9

Metals and Non-Metals Worksheet-9

1. The alloy in which copper is a component is:

(a) bronze          (b) steel              (c) solder           (d) nichrome

2. Copper and tin are components of:

(a) brass            (b) invar             (c) bell metal    (d) alnico

3. Chemical formula of bauxite is:

(a) Al₂O₃.2H₂O                            (b) Al₂SiO₂.2H₂O

(c) Al₂O₃                                        (d) Na₃AlF₆

4. Al₂O₃ is chemical formula of:

(a) cryolite         (b) corundum   (c) kaolin           (d) bauxite

5. What is alumina?

(a) Al₂O₃            (b) Al(OH)₃      (c) NaAlO₂        (d) Al

6. The alloy which contains  aluminium is:

(a) nichrome     (b) type metal   (c) duralium     (d) gunmetal

7. Aluminium bronze is made up of:

(a) Al, Cu, Mn  (b) Fe, Al, Ni     (c) Al, Cu, Ni     (d) Al, Cu

8. An alloy of Al and Mg is:

(a) duralumin   (b) t-metal         (c) alnico           (d) magnalium

9. Which of the following is not a property of aluminium?

(a) Good conductor of heat and electricity

(b) It is malleable

(c) It is heavy

(d) It is ductile

10. Which metal is soft?

(a) Na                 (b) Au                 (c) Sn                  (d) Cu

11. The metal with the lowest density from the following is:

(a) Mg                (b) Li                  (c) Ag                  (d) Au

12. The metal which is liquid at room temperature is:

(a) Hg                 (b) Mg                (c) Ag                  (d) Mn

13. Tungsten is used in electric bulbs because:

(a) it is sonorous

(b) it is metallic and has high melting point

(c) it has high tensile strength

(d) it has high density

14. The non-metal which is a good conductor of electricity is:

(a) silicon          (b) sulphur        (c) graphite       (d) phosphorus

15. Metals combine with oxygen to form oxides.

(a) acidic           (b) basic             (c) neutral         (d) none

Answer Key:

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