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ICSE Class 9 Chemistry Question 25 of 34

The Language of Chemistry — Question 8

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8
Question

Question 1(viii)

In Zn3(PO4)2, the valency of Zn and Phosphate respectively is:

  1. 3 and 2
  2. 2 and 6
  3. 4 and 6
  4. 2 and 3
Answer

2 and 3

Reason — Given the formula Zn3(PO4)2 :

Zn3(PO4)2=Zn23 ↗↖ PO42⇒Zn32 ↗↖ PO43\text{Zn}_3(\text{PO}_4)_2 = \underset{\phantom{2}{3}}{\text{Zn}} \space {\nearrow}\mathllap{\nwarrow} \space \underset{2}{\text{PO}_4} \Rightarrow \overset{\phantom{3}{2}}{\text{Zn}} \space {\nearrow}\mathllap{\nwarrow} \space \overset{3}{\text{PO}_4} \\[0.5em]

∴ Valency of Zinc is 2 and Phosphate is 3.