Question

9. A pure substance can be
a). an element only b) a compound only c) either an element or a compound
d) none of these
10. Which of the following is not a colloidal system?
a) latex b) air c) haemoglobin d) smoke
11. Which of the following statements is not true?
a) true solutions are transparent b) true solutions are homogeneous c)
suspensions are heterogeneous d) colloidal particles can be separated by
filtration
12.A solution contains 10g of chlorine in 100g of the solvent. Its concentration
in terms of mass percentage is -
a) 9.9 b) 9.1 c) 11.1 d) 91
13. How many times an atom of sulphur is heavier than an atom of carbon?
(atomic mass of sulphur-32g)
a) 32 times b) 12 times c) 8/3 times d) 12/32 times
14.The correct symbol of gold is -a) Gd b) Ag c) Ar d) Au​

Answer 1

Answer:

9. C

10. B

11.  D

12.  D

13. C

14. D

Explanation:

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Answer 2

Answer:

9)element         11)true solutions are homogenous       14)Au