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Long Answer Questions:
An element 'Z' forms the following compounds when it reacts with hydrogen, chlorine, oxygen and phosphorous.
ZH_3, ZCl_3, Z_2O_3 and ZP
(a) What is the valency of element ‘Z’? Explain giving reasons.
(b) Is element ‘Z’ a metal or a non-metal? Give reason.
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Answer:
a)We are given that the element Z has a valency of 3. The oxide ion is denoted by O
2−
and has a valency of 2. So in order to find the chemical formula of the compound, we will cross over the valencies of the two combining atoms. Thus the chemical formula of the substance will be Z
2
O
3
b). Z is a non-metal.
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