Preparation of Oxygen

Q.

The gas liberated by heating potassium permanganate $\left({\mathrm{KMnO}}_4\right)$ is:

1. Hydrogen

2. Oxygen

3. Nitrogen

4. Methane

Q.

What are zeolites used for?

Q.

Differentiate between hydrated and anhydrous crystals.

Q.

How can you obtain hydrogen from a mixture of hydrogen and carbon monoxide.

Q.

Name the following :

The process of heating organic substances strongly in the absence of air.

Q.

Oxygen is industrially prepared by which process ?

1. Combustion

2. Fractional Distillation

3. Oxidation

4. Reduction

Q.

Anhydrous substance is the one that does not contain ________.

Q.

Give the examples of hydrated substance.

Q. Which chemical reaction is involved in the preparation of oxygen using potassium permanganate? (2 marks)

Q. What do you mean by electrolysis of water?

Q.

Name the following :

Heating a substance strongly in the absence of air.

Q. Which among the following is released when potassium permanganate is heated in the laboratory?

1. Potassium manganate
   
2. Manganese dioxide
   
3. Oxygen
   
4. Hydrogen

Q.

The process of electrolysis of water results in the formation of ___.

1. True
2. False

3. $H_2$

4. $H_2{O}_2$

Q.

Among the given options, what crystals are used for the preparation of oxygen in the classroom?

1. $KMn{O}_4$

2. $K_{2}Mn{O}_4$

3. $Mn{O}_2$

4. $K_{3}Mn{O}_4$

Q.

Which of the following processes is used for the preparation of oxygen?

1. Electrolysis of water

2. Biodecomposition

3. Fractional distillation of liquified air

4. Combustion

Q.

Name the following.

The process of breaking down of organic substances on heating strongly in the absence of air.

Q.

What are the products formed when ammonia is oxidized with copper oxide?

1. Copper nitride and water

2. Copper nitride and water

3. Copper, water and nitrogen dioxide

4. Copper, water and nitrogen

Q.

Q 1. A 25.0ml sample of hydrogen peroxide decomposes producing 50.0ml of oxygen gas in 137 s. what is the rate of formation of O2 (oxygen gas)in ml/min

Q.

Which gas is evolved when potassium nitrate is heated?

1. Nitrogen

2. Nitrogen dioxide

3. Oxygen

4. None of the above

Q. In an attempt to demonstrate electrical conduction through an electrolyte, the following apparatus ( see the figure ) was set up.

Which among the following statement(s) is/ are correct?
(i) Bulb will not glow because electrolyte is not acidic.
(ii) Bulb will glow because NaOH is a strong base and furnishes ions for conduction.
(iii) Bulb will not glow because circuit is incomplete.
(iv) Bulb will not glow because it depends upon the type of electrolytic solution.

(a) (i) and (iii)
(b) (ii) and (iv)
(c) (ii) only
(d) (iv) only

Q.

Explain how destructive distillation enhances the chemical activity of a substance.

Q.

In the electrolysis of water, why is it that the volume of gas collected on one electrode is two times that on the other electrode?

Q. What do you mean by electrolysis of water?