Advertisements
Advertisements
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 ________]
Advertisements
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.
APPEARS IN
संबंधित प्रश्न
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 on heating decomposes into dinitrogen oxide [nitrous oxide] and steam.
Fill in the blank:
The catalytic oxidation of ammonia to nitric oxide is ------------. (exothermic / endothermic)
process.
State one observation for the following:
Concentrated nitric acid is reacted with sulphur.
How does nitric acid formed in the atmosphere?
What is meant by the following term?
Aqua Fortis
What is meant by the following term?
Aqua regia
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 __________ ]
