[5 Mark Question Answer]

Question 15 Marks

Copy and complete the following table relating to important industrial processes output refers to the product of the process not the intermediate steps.

Name of process	Inputs	Catalyst	Equation for catalysed reaction	Output
Haber process	Hydrogen +
	Ammonia + Air			Nitric acid

Answer

Name of process	Inputs	Catalyst	Equation for catalysed reaction	Output
Haber process	Hydrogen + Nitrogen	Iron	$Na _2( g )+3 H _2 \stackrel{ Fe , Al _2 O _3}{\rightleftharpoons} 2 NH _3( g )$	Ammonia
Ostwald process	Ammonia + Air	Platinum	$4 NH _3+5 O _2 \xrightarrow[800^{\circ} C ]{\text { Platinurn gange }} 4 NO +6 H _2 O +$ Heat	Nitric acid

View full question & answer→

Question 25 Marks

Give two chemical tests to distinguish between dilute nitric acid and hydrochloric acid.

Answer

Dilute nitric acid	Dilute hydrochloric acid
1. On reacting copper metal with nitric acid brown fumes of nitrogen dioxide. $Cu +4 HNO _3 \longrightarrow Cu \left( NO _3\right)_2+2 NO _2+2 H _2 O$	1.On treating copper metal with HCl We dont observe any reaction.
2. Brown ring test : Nitric acid in a test tube is taken and then and then freshly prepared ferrous sulphate solution is added. Concentrated $H_2SO_4$ is then added carefully down the sides of the test tube, dark brown ring is formed at the juctions of two layers. $\ce{6FeSO4 + 3H2SO4 + 2HNO3 -> 3Fe2(SO4)3 + 2NO + 4H2O }$ $\ce{FeSO4 + NO + 5H2O -> \underset{\text{Hydrated nitrosoferrous Sulphate (brown ring)}}{[Fe(No)(H2O)5]SO4}}$	2. No brown ring test is observed in the caseof hydrochloric acid.

View full question & answer→

Question 35 Marks

Describe the Ostwalds process for the manufacture of nitric acid with labeled diagram.

Answer

Ostwald process :-
The nitric acid is manufactured by Ostwald process, ln ostwald process ammonia gas and air are taken in 1:10 ratio, Pt gauge is used as a catalyst in ostwald process. Following steps are involved in Ostwalds process for the manufacture of nitric acid.
1. Oxidation of ammonia in catalytic chamber.
$\ce{4NH3 +5O2 ->[Platinum gauge][800°C] 4NO + 6H2O +Heat}$
2. Oxidation of nitric acid in oxidation chamber.
$\ce{2NO + O2 ->[50°C] 2NO2}$
3. Absorption of nitrogen dioxide in water.
$\ce{4NO2 + O2 +2H2O -> 4HNO3}$

View full question & answer→

Chemistry [5 Mark Question Answer]

Test yourself on this topic