MEDIUM
12th CBSE
IMPORTANT
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Write the structure of pyrophosphoric acid.

Important Questions on The p-Block Elements

MEDIUM
12th CBSE
IMPORTANT
NCERT Exemplar Chemistry - Class 12>Chapter 7 - The p-Block Elements>Short Answer Type>Q 41
PH3 forms bubbles when passed slowly in water but NH3 dissolves. Explain, why?
HARD
12th CBSE
IMPORTANT
NCERT Exemplar Chemistry - Class 12>Chapter 7 - The p-Block Elements>Short Answer Type>Q 42
In PCl5, phosphorus is in sp3d hybridised state but all its five bonds are not equivalent. Justify your answer with reason.
MEDIUM
12th CBSE
IMPORTANT
NCERT Exemplar Chemistry - Class 12>Chapter 7 - The p-Block Elements>Short Answer Type>Q 43
Why is nitric oxide paramagnetic in gaseous state, but the solid obtained on cooling it is diamagnetic?
MEDIUM
12th CBSE
IMPORTANT
NCERT Exemplar Chemistry - Class 12>Chapter 7 - The p-Block Elements>Short Answer Type>Q 45
Out of H2O and H2S, which one has the highest bond angle, and why?
MEDIUM
12th CBSE
IMPORTANT
NCERT Exemplar Chemistry - Class 12>Chapter 7 - The p-Block Elements>Short Answer Type>Q 46
SF6 is known but SCl6 is not. Why?
HARD
12th CBSE
IMPORTANT
NCERT Exemplar Chemistry - Class 12>Chapter 7 - The p-Block Elements>Short Answer Type>Q 47
On reacting with Cl2, phosphorus forms two types of halides ‘A’ and ‘B’. Halide A is yellowish-white powder but halide ‘B’ is colourless oily liquid. Identify A and B, and write the formulae of their hydrolysis products.
HARD
12th CBSE
IMPORTANT
NCERT Exemplar Chemistry - Class 12>Chapter 7 - The p-Block Elements>Short Answer Type>Q 48
In the ring test of NO3- ion, Fe2+ ion reduces nitrate ion to nitric oxide, which combines with Fe2+ (aq) ion to form brown complex. Write the reactions involved in the formation of brown ring. 
HARD
12th CBSE
IMPORTANT
NCERT Exemplar Chemistry - Class 12>Chapter 7 - The p-Block Elements>Short Answer Type>Q 49

Explain why the stability of oxoacids of chlorine increases in the order given below:

HClO < HClO2 < HClO3 < HClO4