Chemical Properties of Oxygen

Q. Magnesium ribbon burns in air to produce .

1. magnesium oxide
2. magnesium hydroxide
3. oxygen

Q.

Question 36
A magnesium ribbon is burnt in oxygen to give a white compound X accompanied by emission of light. If the burning ribbon is now placed in an atmosphere of nitrogen, it continues to burn and forms a compound Y.

(a) Write the chemical formulae of X and Y.

(b) Write a balanced chemical equation, when X is dissolved in water.

Q.

Why is oxygen considered as a supporter of combustion ?

Q. What are the differences between combustion and burning.

Q.

Name the product formed when a metal reacts with oxygen.

Q.

Combustion is a reaction in which a substance reacts with-

1. hydrogen

2. nitrogen

3. oxygen

4. chlorine

Q.

Explain through an activity that hydrogen is a combustible gas but not a supporter of combustion.

Q. Metal reacts with to form metal oxide. The metal oxide formed is in nature.

1. hydrogen
2. oxygen
3. basic
4. acidic

Q.

The process of burning subtstance in oxygen is called ___ .

Q.

Aluminium combines with oxygen to form its oxide which fades its lustre.

1. True

2. False

Q.

On burning wood, _______ and _______ are formed.

Q. Oxygen present in air is responsible for the change in colour of the Statue of Liberty.

1. True
2. False

Q.

Sodium and potassium form oxides

1. On strong heating

2. At ordinary temperature

3. At high temperature

4. In the presence of a catalyst

Q. Metals react with oxygen to produce __________ oxides, and non-metals react with oxygen to produce __________ oxides.

Q.

The substances which do not allow oxidation to occur are called _______ .

1. Non-supporter of combustion

2. Supporter of combustion

3. Reactive substances

4. Explosive substances

Q. Magnesium ribbon burns in air to produce .

1. magnesium oxide
2. magnesium hydroxide
3. oxygen

Q. What is metal oxide?