What is phase transfer catalyst?
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Define Atom ?
What is Distillation ?
Why a hot day in Calcutta causes more discomfort than are equally hot day in Delhi ?
Why are substances like caustic soda and calcium chloride called hygroscopic substances ?
Why titration in which hcl and h2so4 is use?
What is the limitation of cod?
What is the purest form of water ?
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Why we use potassium dichromate in control of absorbance in uv region and copper sulphate in control of absorbance in visible region?
Why is glass electrode called an ion selective electrode?
What s the difference between hard and soft coal ?
How is brass solution prepared?
Which gas is used in refrigeration plants ?