Question

2. Tick (V) the correct answer
(a) The valency of iron in Fe203, is
(i) 1
(ii) 2
(iii) 3
(iv) 6
(b) Which of the following has valency 4?
(i) aluminium (ii) oxygen
(iii) carbon (iv) phosphorus
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Answer 1

Answer:

answer is

Q2 ( a) 3

(b) phosphorus