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प्रश्न
State one observation for the following:
Concentrated nitric acid is reacted with sulphur.
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उत्तर
Concentrated nitric acid is a strong oxidising agent that converts sulphur to sulphuric acid, along with water and nitrogen dioxide.
\[\ce{S + 6HNO3 -> H2SO4 + 2H2O + 6NO2}\]
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संबंधित प्रश्न
Correct the following, if required:
NaNO3 gives NO2 and O2 on heating.
Correct the following, if required:
Constant boiling nitric acid contains 80% nitric acid by weight.
From the following list of substances, choose one substance in each 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 nitrate which gives off oxygen and nitrogen dioxide when heated.
Fill in the blank:
The catalytic oxidation of ammonia to nitric oxide is ------------. (exothermic / endothermic)
process.
Fill in the blank :
Magnesium gives ------------(O2, H2, NO) with very dilute nitric acid.
Distinguish between the following pairs of compounds using the reagent given in the bracket.
Dilute hydrochloric acid and dilute sulphuric acid. (Using lead nitrate solution)
What is meant by the following term?
Aqua regia
Name the following:
A nitrate which has no water of crystallization.
State the effect of adding a small amount of : (a) sodium hydroxide (b) ammonium hydroxide followed by an excess in case to samples of the salt solutions.
Calcium nitrate [ small amount __________ in excess __________ ]
State the effect of adding a small amount of : (a) sodium hydroxide (b) ammonium hydroxide followed by an excess in case to samples of the salt solutions.
Zinc nitrate [ small amount ________ in excess ________]
