Q 9. An element X from group 2 of the Periodic Table reacts with Y from group 17 to form a compound. Give the formula of the compound. *
(a) XY₂
(b) XY
(c) X₂Y
(d) (XY)₂
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12
Answer:
OPTION A XY group 2 and its valency is 2. Element Y is from group 17 and its valency is 1. So, one atom of X combines with two atoms of Y to give a compound of the formula XY2.
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2
Answer:
(a) is the answer of question 9
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