Page No 180: - Chapter 7 - P - Block Elements - Intext Solutions - Ncert Solutions class 12 - Chemistry
Updated On 26-08-2025 By Lithanya
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Question 7.11:
What is the basicity of H3PO4?
Answer:
H3PO4
Since there are three OH groups present in H3PO4, its basicity is three i.e., it is a tribasic acid.
Question 7.12:
What happens when H3PO3 is heated?
Answer:
H3PO3, on heating, undergoes disproportionation reaction to form PH3 and H3PO4. The oxidation numbers of P in H3PO3, PH3, and H3PO4 are +3, −3, and +5 respectively. As the oxidation number of the same element is decreasing and increasing during a particular reaction, the reaction is a disproportionation reaction.
