Question

Ammonia can be dried by

A. $${\text{conc}}{\text{.}}\,{H_2}S{O_4}$$
B. $${P_4}{O_{10}}$$
C. $$CaO$$  
D. $${\text{anhydrous}}\,CaC{l_2}$$
Answer :   $$CaO$$
Solution :
$$N{H_3}$$ does not react with $$CaO$$  while other reacts with $$N{H_3}$$
$$\eqalign{ & 2N{H_3} + {H_2}S{O_4} \to {\left( {N{H_4}} \right)_2}S{O_4} \cr & {P_4}{O_{10}} + 12N{H_3} \to 4{\left( {N{H_4}} \right)_3}P{O_4} + 6{H_2}O \cr & CaC{l_2} + 8{H_2}O \to CaC{l_2}.8{H_2}O \cr} $$

Releted MCQ Question on
Inorganic Chemistry >> P - Block Elements

Releted Question 1

The reddish brown coloured gas formed when nitric oxide is oxidised by air is

A. $${N_2}{O_5}$$
B. $${N_2}{O_4}$$
C. $$N{O_2}$$
D. $${N_2}{O_3}$$
Releted Question 2

The temporary hardness of water due to calcium carbonate can be removed by adding —

A. $$CaC{O_3}$$
B. $$Ca{\left( {OH} \right)_2}\,$$
C. $$CaC{l_2}$$
D. $$\,HCl$$
Releted Question 3

Which of the following is most stable to heat

A. $$HCl$$
B. $$HOCl$$
C. $$HBr$$
D. $$HI$$
Releted Question 4

White $$P$$ reacts with caustic soda. The products are $$P{H_3}$$ and $$Na{H_2}P{O_2}.$$   This reaction is an example of

A. Oxidation
B. Reduction
C. oxidation and reduction
D. Neutralisation

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