What is the role of stannous chloride?
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Why are substances like caustic soda and calcium chloride called hygroscopic substances ?
What are the electrodes used in the measurement of ph for the determination of pka?
What is the use of nitrogen in air ?
what is the process for separating the components of gunpowder?
What is Valency ?
What is ignition point ?
what is the indicator used?
What are hard waters?
Why does the filament of an electric lamp glow, when current passes through it ?
From which substance are the dues manufactured ?
What is the unit of ph?
Why we use potassium dichromate in control of absorbance in uv region and copper sulphate in control of absorbance in visible region?