KEAM 2021 Physics and Chemistry Solved Paper

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Question : 112 of 120

Marks: +1, -0

Choose the wrong statement in the following with regard to orthoboric acid:

It can be prepared by the hydrolysis of boron trihalide
It is not a protonic acid but acts as a Lewis acid
It has a layer structure
It is freely soluble in cold water
On heating above 370 K it forms first metaboric acid which on further heating yields B2O3

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