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Question-1
The basicity of pyrophosphorus acid is

(A) 2	(B) 4
(C) 1	(D) 5

Plus 2 Computer Science

CBSE

Practice in Related Chapters
The Solid State
Solutions
Chemical Kinetics
General Principles And Processes Of Isolation Of Elements
Surface Chemistry
Co-Ordination Compounds
Electrochemistry
Electrochemistry
The p-Block Elements
Haloalkanes and Haloarenes
The D and F Block Elements
Transition Elements:d and f Block Elements
Oxygen Family
Polymers
Polymers
Biomolecules
Aldehydes , Ketones and Carboxylic Acids
Alcohols,Phenols and Ethers
Atomic Structure
Chemistry in Everyday Life
Organic Compounds Containing Nitrogen