JEE Main & Advanced
Chemistry
The p-block Elements-II / p-ब्लॉक तत्व-II
Question Bank
Self Evaluation Test - The p-Block Elements (Group 15, 16, 17 & 18)
question_answer
The number of \[P-OH\] bonds and the oxidation state of phosphorus atom in pyrophosphoric acid \[({{H}_{4}}{{P}_{2}}{{O}_{7}})\] respectively are:
A)four and four
B)five and four
C)five and five
D)four and five
Correct Answer:
D
Solution :
[d] Oxidation State: Each P atom is bound to one oxygen \[=-1\] \[2OH=-1\times 2=-2\] \[1\text{ }Oxygen=-2\] \[Total=-5\] P=+5.