ICSE Class 9 Answered
What do you observe when Lead Nitrate crystals are strongly heated
Name the gas evolved when nitrogen combines with hydrogen
Write a balanced chemical equation for addition of zinc to sodium hydroxide solution
Name the industrial method for preparation of hydrogen gas and name the catalyst used in above process
Distinguish between the following pairs of substances on the basis of chemical tests given in the brackets.
: sodium chloride and potassium. chloride(flame test)
: zinc carbonate and lead carbonate(dry heatingg
6. Calculate the volume of gas X at STP if it occupies 380 litres. at 300 Kelvin and 70 cm of. Mercury
7. A gas occupies 17 at 27 degree Celsius what volume will it occupy at 273 degree Celsius pressure remaining constant.
8. Calculate the relative molecular mass of each of the following
(1.) ammonium dichromate
(2.) hydrated copper sulphate
9. Calculate the percentage of Nitrogen in Ammonium Nitrate
Asked by Kanwaranita10 | 03 Feb, 2019, 09:05: AM
Expert Answer
1. What do you observe when Lead Nitrate crystals are strongly heated
Lead nitrate decomposes on heating leaving a yellow residue lead monoxide, brown gas nitrogen dioxide and colourless gas oxygen.
2. Name the gas evolved when nitrogen combines with hydrogen
Ammonia gas is formed when nitrogen combines with hydrogen
3. Write a balanced chemical equation for the addition of zinc to a sodium hydroxide solution
When sodium hydroxide solution is heated with zinc, then the sodium zincate is formed and hydrogen gas is evolved.
4. Name the industrial method for preparation of hydrogen gas and name the catalyst used in the process
Bosch process is used for the preparation of hydrogen gas.
The catalysts used in the process is ferric oxide(Fe2O3).
Answered by Varsha | 04 Feb, 2019, 11:11: AM
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