When a metal reacts with cold water, it typically forms a hydroxide of the metal and hydrogen gas. Here's a brief analysis of the options provided:

1. **A: Hydroxide** - This is correct. Most metals, especially alkali and alkaline earth metals, react with water to produce metal hydroxides and hydrogen gas.

2. **B: Oxide** - This is not correct in the context of a reaction with cold water. Oxides are generally formed when metals react with oxygen, not water.

3. **C: Salt** - While some reactions can produce salts when acids or other compounds are involved, the direct reaction with cold water does not typically yield a salt.

4. **D: Oxygen** - Oxygen is not produced in this reaction with water. Instead, hydrogen gas is released.

### Final Answer
The correct answer is **A: Hydroxide**.

Question

When a metal reacts with cold water, it typically forms a hydroxide of the metal and hydrogen gas. Here's a brief analysis of the options provided:

1. **A: Hydroxide** - This is correct. Most metals, especially alkali and alkaline earth metals, react with water to produce metal hydroxides and hydrogen gas.
   
2. **B: Oxide** - This is not correct in the context of a reaction with cold water. Oxides are generally formed when metals react with oxygen, not water.

3. **C: Salt** - While some reactions can produce salts when acids or other compounds are involved, the direct reaction with cold water does not typically yield a salt.

4. **D: Oxygen** - Oxygen is not produced in this reaction with water. Instead, hydrogen gas is released.

### Final Answer
The correct answer is **A: Hydroxide**.

Knowee AI · Accepted Answer

When a metal reacts with cold water, it typically forms a hydroxide of the metal and hydrogen gas. Here's a brief analysis of the options provided:

1. **A: Hydroxide** - This is correct. Most metals, especially alkali and alkaline earth metals, react with water to produce metal hydroxides and hydrogen gas.
   
2. **B: Oxide** - This is not correct in the context of a reaction with cold water. Oxides are generally formed when metals react with oxygen, not water.

3. **C: Salt** - While some reactions can produce salts when acids or other compounds are involved, the direct reaction with cold water does not typically yield a salt.

4. **D: Oxygen** - Oxygen is not produced in this reaction with water. Instead, hydrogen gas is released.

### Final Answer
The correct answer is **A: Hydroxide**.

When a metal reacts with cold water it forms Aa hydroxide Ban oxide Ca salt Doxygen

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