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प्रश्न
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 ________]
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उत्तर
Zinc nitrate :
a. with sodium hydroxide :
- \[\ce{Zn(NO3) + 2NaOH -> Zn(OH)2 + 2NaNO3}\]
- On addition of excess of NaOH, white ppt. of Zn(OH)2 dissolves.
b. With ammonium hydroxide :
- \[\ce{Zn(NO3) + 2NH4OH -> Zn(OH)2 + 2NH4NO3}\]
- The gelatinous white insoluble ppt. of Zn(OH)2 dissolves in excess of ammonium hydroxide.
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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.
Correct the following, if required:
Nitric acid remains colourless even when exposed to light.
Name a nitrate of metal which on heating does not give nitrogen dioxide.
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 only oxygen when heated
Fill in the blank:
------------ (iron / copper) become passive in concentrated nitric acid
How does nitric acid formed in the atmosphere?
Mention three important uses of nitric acid. Give the properties of the nitric acid involved in its use.
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 __________ ]
Differentiate between the following pairs based on the odourless gas which turns lime water milky and the criteria given:
Sulphuric acid and Nitric acid (using barium chloride solution)
