What is glacial acetic acid?
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Why does milk turn sour ?
Mention a few important criteria for satisfactory colorimetric analysis.
Why do we feel chilly in damp clothes ?
What is wave length?
What is the composition of stainless steel ?
Mention a few advantages of photoelectric colorimetric determination.
Why mud houses are cooler in summer and warmer in winter ?
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While standing on railway platform and heating the whistle of an engine coming towards us , we hear the sound increasing; bit when the engine is receding from us it appears to fall why ?
How is hardness of water caused?
What is gas-filled lamp ?