Question

4. A gas 'P' gives dense white fumes with chlorine. Its
aqueous solution gives a blue colour with copper (II)
hydroxide. (a) Name the gas P. (b) Give its formula.
(c) Give three uses of P.​

Answer 1

Answer:

a) The name of the gas that shows the above reactions when reacted with certain compounds is:

$\large{ \underline{ \boxed{ \bf{ \orange{Ammonia}}}}}$

b) The chemical formula of Ammonia is $\boxed{\sf{NH_3}}$. It is a nitrogenous compound, as it contains Nitrogen.

c) Ammonia is very essential raw material and used in the manufacturing of many chemicals in the factories like:

• Fertilizers
• Pesticides
• Ammonium phosphate
• Nitric acid (HNO3)
• Baking soda and Washing soda

Explore more !!

The most important nitrogenous compounds are Ammonia and Nitric acid because they are used as raw materials in factories. Some more facts and figures about Ammonia are:

• Ammonia in free state, found in traces in water and air.
• It is toxic compound. Many aquatic organisms excrete out ammonia as their waste product.
• Ammonium liquor is obtained by destructive distillation of Coal. It is used in making plastics, and other chemicals.
• Ammonia is prepared in large scale by Haber's process.
• It is colourless and have a pungent smell.
• It has boiling point of 33°C and freezing point of -78°C.
• It is non-combustible and doesn't support combustion like Oxygen.
• It undergoes oxidation and act as a reducing agent in many reactions.

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Answer 2

$\large\bf\underbrace{\purple{GIVEN:-}}$

▼ A gas ‘P’ gives dense white fumes with chlorine . It's aqueous solution gives a blue colour with copper(II) hydroxide .

__________________________

(a) The Name of the Gas ‘P’ is,

$\checkmark\:\large\rm{\underline{\boxed{\green{AMMONIA}}}}$

__________________________

(b) Formula of Gas ‘P’ is,

$\checkmark\:\large\bf{\underline{\boxed{\blue{NH_3}}}}$

__________________________

(c) Uses of the Gas ‘P’ is,

1. It is used in industrial preparation of Nitric-acid by Ostwald process.
2. It is used in manufacturer of fertilizers such as ‘Ammonium sulphate’, ‘Ammonium nitrate’, ‘Ammonium phosphate’ .
3. It is used in the manufacturer of ‘Sodium carbonate’ by Solvay process .

__________________________

$\bigstar\:\sf{\underline{\red{\boxed{SOLVAY\:Process\:}}}}$

$\rm{\pink{\underline{NaCl\:+\:NH_3\:+\:CO_2\:+\:H_2O\:\rightarrow\:NaHCO_3\:+\:NH_4Cl\:}}}$