What is pka of acid?
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Which is heavier, water or ice ?
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 ?
What are constituents of brass?
What is an indicator electrode?
What variety of carbon is used for refining purposes ?
Arrange by acidic values : phenol, nitrotolouene and o-cresol?
Why is salt thrown on the frozen road ?
What is the role of stannous chloride?
What is gas-filled lamp ?
Define what is avogadro’s law?
What are filters? Why are they used?
What is german silver?