Question

(a) 1
9. What is the valency of nitrogen in AIN?
(b) 2
(c) 3
(d) Not definite
10. Which of the following is the correct symbol of arsenic?
(a) A
(b) Ar
(c) An
(d) As
11. Which of the following is a divalent radical?
(a) sodium
(b) phosphate
(c) oxalate
(d) borate
12. What is the molecular mass of K.CO.
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Answer 1

10. (d) As

12. Molar Mass of KCO is 67.1084g/mol

Answer 2

ANSWER

09) 3

10) Ar

11) borate

12) sorry I don't know