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प्रश्न
How can 68% nitric acid be concentrated to 98% nitric acid?
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उत्तर
98% nitric acid is obtained by distilling 68% nitric acid with conc. H2SO4 under reduced pressure. The function of H2SO4 is to absorb water.
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संबंधित प्रश्न
Give a balanced chemical equation for Laboratory preparation of Nitric acid.
Explain the following:
Concentrated nitric add appears yellow when it is left standing in a glass bottle.
How will you prepare the following from nitric acid?
Aqua regia
Give reason for the following:
Commercial concentrated nitric acid is yellow in colour, but when it is dilute with water, it turns colourless.
Give one chemical test for nitric acid.
Name (formula is not acceptable) the gas produced in the following reaction:
By the action of concentrated nitric acid on copper.
Why should the temperature of the reaction mixture of nitric acid not be allowed to rise above 200oC?
Explain the following :
An all glass apparatus is used in the laboratory preparation of nitric acid.
What is the property of nitric acid which allows it to react with copper?
From the following list of substances, choose one substance in the case which matches the description given below:
Ammonium nitrate, calcium hydrogen carbonate, copper carbonate, lead nitrate, potassium nitrate, sodium carbonate, sodium hydrogen carbonate, zinc carbonate.
A Substance that gives off only oxygen when heated.
Give a balanced equation for the following reaction:
Copper reacts with concentrated nitric acid.
