Question

A- Tick the correct of following questions...

2.Sugar is a compound which consists of
(a) carbon and hydrogen
(b) hydrogen and oxygen
(C) carbon, hydrogen and oxygen
(d) hydrogen, carbon and sulphur

3.Atoms of different kinds combine to form molecules of
(a) an element
(b)a compound
(b) a mixture
(d)all of the above

4. Sulphur and carbon are
(a) metals
(b) non metals
(C) metalloids
(d) noble gases

5. Gold is used to make jewellery because
(a) it is dull
(b)lustrous and attractive
(c) highly reactive
(d) very cheap

6. The most abundant elements in the universe are
(a) neon and argon
(b) hydrogen and helium
(c)aluminium and copper
(d) oxygen and nitrogen

7.The compound used as common salt is
(a) sodium chloride
(b) calcium chloride
(C) sodium oxide
(d) hydrogen chloride

8.Brass and bronze are
(a) elements
(b) mixtures
(c) compounds
(d) all of the above

9. Sand is a compound of
(a) silicon und nitrogen
(b) silicon and oxygen
(c) oxygen and sulphur
(d) none of the above

10. From the list given below select the correct substance which is most suitable to the statements given:
[oxygen, diamond, zinc, graphite, gold]

(a) A metal which is brittle.
(b)A non-metal which is a good conductor of electricity
(c) The hardest naturally occurring substance.
(d) The most ductile metal
(e) A gaseous non-metal.​

Answer 1

Answer:

2 b

3 d

4 b

5 c or b

6 d

7 a

8 d

9 a

10 c ( zinc)

Explanation:

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