Hot water tanks in boilers are made of copper, not iron. Which of the following is the correct reason for this?

Iron is not a thermal conductor.
Copper is stronger than iron.
Iron is not malleable and cannot be shaped as water tank.
Copper does not react with water at all.

LohaHridoy

4 views

2025-01-04 04:42

1 Answers

AhmedNazir

Option 4 : Copper does not react with water at all.

The correct answer is Copper does not react with water at all.

Concept:

Metals:

The elements that tend to lose electrons are called metals.
They are rigid, hard, and usually exist in a solid-state at room temperature.
They are lustrous, malleable, and ductile.

Explanation:

Metals react with water to form metal oxides or hydroxides.
Not all metals react with water in the same way.
- Sodium metal catches fire in reaction to water.
- magnesium reacts with hot water.
- Iron reacts with steam.
- Lead and copper do not react with water.

Iron will react with hot water and rust over time but copper does not react with water and will remain intact.

Thus, hot water tanks in boilers are made of copper, not iron because copper does not react with water at all.

Chemical properties of metals:

- Metal + Oxygen → Metal oxide
The metal reacts with an acid to form a salt.
- Metal + Acid → Salt + Hydrogen gas
Metals react with water to form oxides or hydroxides.
- Metal + water → Metal oxide/ hydroxide
Metals do not react with alkalis.
- Metal + Alkali → No reaction

4 views Answered 2022-09-04 04:29

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