Question

4. Which is not a property of metals?
a. malleability
b. sonority
c good conductors of heat and electricity
d. bad conductors of heat and electricity
5. Which non-metal has a shining surface?
a. iodine
b. sulphur
6. Thin films of which metal are used on satellites to control temperature?
a. copper
b. silver
c. aluminium
C. zinc
d. copper
d. gold
d. sulphur
7. Which non-metal is used in the steel industry to remove impurities?
a. nitrogen
b. carbon
C. oxygen
8. Which non-metal is used in the manufacture of matches and bullet tracers?
a. phosphorous
b. carbon
C. Oxygen
d. sulphur
9. Which of the following is mainly used for making transistors and semiconductors?
a. phosphorous
b. germanium
C. silver
d. sulphur
10. Which process involves coating iron with a thin layer of zinc?
a. electroplating b. electrolysis
c. galvanization
d. none of these​

Answer 1

Answer:

4. d.

5. a.

6.

7. oxygen

8. carbon

9. c.

10. a.