CBSE 12th Standard Chemistry Subject The p-Block Elements Value Based Questions 3 Mark Questions With Solution 2021
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CBSE 12th Standard Chemistry Subject The p-Block Elements Value Based Questions 3 Mark Questions With Solution 2021
12th Standard CBSE
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Reg.No. :
Chemistry
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It is desired to produce ammonia gas from nitrogen and hydrogen according to the reaction:
\({ N }_{ 2 }(g)+3H_{ 2 }(g)\rightleftharpoons 2NH_{ 3 }(g)+Heat\)
Above reaction is exothermic and therefore, favored by low temperature. As a student of chemistry,which temperature would you suggest 350k or 750 k? Justify(a) -
Nitrogen fertilizers are commonly used to promote the growth of plants and boost the crop yield.As a student of chemistry,can you suggest a farmer whether he should use excess nitrogen fertilizers to get maximum yield or not?
(a) -
Sulphuric acid is manufactured by Contact process.During the process,the following reaction takes place:
\({ 2SO }_{ 2 }(g)+O_{ 2 }(g)\rightleftharpoons 2SO_{ 3 }(g)\)
This reaction is favoured by high pressure, However,the pressure is not increase beyond 3 bar.As a students of chemistry how will you justify this?(a) -
Account for the following:
(i) Iron on reaction with HCI forms FeCl2 and not FeCI3.
(ii) Draw structure of XeO3.(a)
