Metals Reaction with Oxygen (Burnt in Air)

Q.

What is formed when hot copper reacts with oxygen in air?

1. Oxide

2. Alloy

3. Metalloid

4. Degradation

Q.

Metals react with oxygen in air to form _________.

1. Oxides

2. Carbonates

3. Sulphides

4. Nitrates

Q.

A metal X reacts with oxygen to form a compound which possess high melting point. The compound is also soluble in water. The element X is:

1. Calcium
2. Carbon
3. Silicon
4. Sulphur

Q. Silver and gold do not react with oxygen even at a very high temperature and are called ___.

1. noble metals
2. inert metals
3. Either a or b
4. None of these

Q.

Which substance is formed when aluminium reacts with oxygen?

1. Al₂O₃

2. AlO

3. Al₂O

4. AlO₃

Q.

What is formed when hot copper reacts with oxygen in air?

1. Alloy

2. Metalloid

3. Oxide

4. Degradation

Q.

Metals react with oxygen in air to form _________.

1. Carbonates

2. Oxides

3. Sulphides

4. Nitrates

Q. Silver and gold do not react with oxygen even at a very high temperature and are called ___.

1. noble metals
2. inert metals
3. Either a or b
4. None of these

Q.

Which substance is formed when aluminium reacts with oxygen?

1. Al₂O₃

2. AlO₃

3. AlO

4. Al₂O

Q.

A metal X reacts with oxygen to form a compound which possess high melting point. The compound is also soluble in water. The element X is:

1. Calcium
2. Carbon
3. Silicon
4. Sulphur