Amphoteric Metals

Q. Give two examples of amphoteric hydroxides.

Q.

Which of the following oxides react with both acids and bases?

1. Amphoteric oxides

2. Basic oxides

3. Acidic oxides

4. Neutral oxides

Q.

Carbon dioxide is an example of:

1. Basic oxide

2. Amphoteric oxide

3. Neutral oxide

4. Acidic oxide

Q.

What is the amphoteric oxide among these ?

1. K₂O

2. CO₂

3. SO₂

4. Al₂O₃

Q. Do all metalloids form amphoteric oxides ?

Q. _________ can react with both acids and alkalis to give salt and water.

1. Amphoteric Metal

Q.

The salt formed when aluminium oxide reacts with potassium hydroxide is:

1. potassium aluminate

2. potassium silicate

3. potassium aluminium silicate

4. potassium oxide

Q.

Why do alkali metals tarnish on exposure to air?

Q.

An oxide act as a base when it reacts with an acid and acts as an acid when it reacts with a base. Identify the type of oxide.

1. Acidic oxides

2. Basic oxides

3. Neutral oxides

4. Amphoteric oxides

Q. NH₃ and H₂O are amphoteric oxides. How can you say so ??

Q.

The metal that reacts with the acid, as well as Alkali, is called …………

Q.

Out of the following elements, choose the elements which are capable of forming amphoteric oxides.

1. Zinc and Aluminium

2. Iron and Aluminium

3. None of these

4. Nickel and Zinc

Q.

Identify the amphoteric oxide from the following:

1. Al₂O₃

2. Na₂O

3. K₂O

4. MgO

Q. wh is ment by amphoteric oxide?

Q.

Which of the following is not an amphoteric oxide?

1. Aluminium oxide

2. Lead oxide

3. Sodium oxide

4. Zinc oxide

Q.

Out of the following elements, choose the elements which are capable of forming amphoteric oxides.

1. Zinc and Aluminium

2. Iron and Aluminium

3. Nickel and Zinc

4. None of these

Q. An element undergoes partial combustion with oxygen to form a compound which has no effect on litmus. Identify the element.

1. Iron
2. Magnesium
3. Carbon
4. Aluminium