Laboratory Preparation of HCl

Q.

A student spilled a bottle of ammonia in one corner of the laboratory. Soon the whole laboratory was filled with pungent irritating smell . The student immediately opened the windows and doors and switched on the exhaust fans . After some time students got relief. Explain what did actually happen

Q.

In the laboratory preparation of $HCl$ gas, the drying agent used conventionally (conc. $H_{2}S{O}_4$) can be replaced by quicklime & phosphorous pentoxide.

1. False

2. True

Q.

What reactants do we use for the laboratory preparation of hydrogen chloride?

1. Nitric acid and chlorine

2. Water and nitric acid

3. Sulphuric acid and sodium chloride

4. Water and sulphuric acid

Q.

In the laboratory preparation of hydrochloric acid, the reactants used are:

1. $NaCl+HS{O}_4$

2. $NaCl+H_{2}S{O}_4$

3. $KCl+HN{O}_3$

4. $KN{O}_3+H_{2}S{O}_3$

Q.

During the electrolysis of water, large amount of hydronium ions are produced when water is acidified with

1. Dilute sulphuric acid

2. Dilute carbonic acid

3. Dilute acetic acid

4. Dilute latic acid

Q.

Write the equation for the reaction of hydrochloric acid with lead nitrate solution

Q. Treatment of concentrated solution of borax with calculated quantity of sulphuric acid gives

1. 

2. 

3. 

4. 

Q.

Conc. sulphuric acid is used as it is non volatile and has a high boiling point.

1. False

2. True

Q.

In the laboratory preparation of HCl, which solution is present in the thistle funnel?

1. Sulphuric acid

2. Hydrochloric acid

3. Sodium Chloride

4. Nitric acid

Q.

In the laboratory, temperatures above 200°C are not used in general because:

1. Fuel is wasted

2. The glass apparatus may tend to break

3. The product formed sticks to the glass and difficult to remove.

4. None of the above

Q.

What happens when sodium bicarbonate reacts with hydrochloric acid?

Q.

While preparing hydrochloric acid back suction can be avoided by

1. special funnel arrangement immersed in water

2. carefully placing the delivery tube immersed in water

3. special funnel arrangement just touching the water surface.

4. Back suction cannot be avoided

Q.

Hydrogen is collected by the _______ displacement of _______ .

1. Downward; water

2. Upward; water

3. Upward; air downward; air

Q.

Galuber was the first person to prepare HCl gas. Which reactants did he use?

1. Salt and carboxylic acid

2. Nitric acid and chlorine

3. Sulphuric acid and common salt

4. Water and sulphuric acid

Q.

"Downward displacement of air" is a method of

1. collection of HCl gas

2. purification of HCl gas

3. identification of HCl gas

4. preparation of HCl gas

Q.

Hydrogen chloride gas is collected by the ___ displacement of air.