46. An element A forms an oxide A205.
(a) What is the valency of element A ?
(b) What will be the formula of chlori
17. An element X forms the following co
HX, CX2 XO2,
State the three valencies of element
8. If the aluminium salt of an anion X
estions Based on High Order Thinkir
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ACl3,A2O5,Mg3A2
Valency of A is 3. Its maximum oxidation state is +5.
It is a group V element with no d-orbitals (it can't form compounds of valency more than 4), so, it must be nitrogen.
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