Oxides and hydroxides of certain metals such as ........ .................. are amphoteric in nature.

Options

A. zinc, sodium, aluminium
B. Zinc, lead, copper
C. aluminium, copper, sodium
D. zinc, lead, aluminium

Explanation

To answer the question regarding which metals have amphoteric oxides and hydroxides, we will follow these steps:

### Step 1: Understand the term "amphoteric"
Amphoteric substances are those that can react with both acids and bases. This means they can act as either an acid or a base depending on the reaction conditions.

### Step 2: Identify examples of amphoteric metals
Common metals that exhibit amphoteric behavior include:
- Zinc (Zn)
- Aluminium (Al)
- Beryllium (Be)
- Chromium (Cr)
- Lead (Pb)

### Step 3: Write the answer
Based on the understanding of amphoteric nature and the examples provided, the answer to the question is:
"Oxides and hydroxides of certain metals such as **zinc and aluminium** are amphoteric in nature."

### Step 4: Provide a brief explanation of reactions
For instance, zinc hydroxide (Zn(OH)₂) can react with an acid, such as hydrochloric acid (HCl), to form zinc chloride (ZnCl₂) and water (H₂O). Conversely, it can also react with a base, such as sodium hydroxide (NaOH), to form sodium zincate (Na₂ZnO₂) and water.

### Summary of the solution:
- Amphoteric substances can react with both acids and bases.
- Examples of amphoteric metals include zinc and aluminium.
- The answer is: "Oxides and hydroxides of certain metals such as **zinc and aluminium** are amphoteric in nature."