Which of the following are true 1 Iron decomposes steam to evolve hydrogen 2 Liq...........

General Science (Easy) Chemistry

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Which of the following are true ?

1) Iron decomposes steam to evolve hydrogen

2) Liquid sodium is used as a coolant in nuclear reactors

3) Metals are placed at the right hand side of the periodic table

4) Rusting of iron increase its weight.

1, 2, 3, 4

1, 2, 4

1, 2

2, 4

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Explanation:

- Iron decomposes steam to evolve hydrogen: True. Iron reacts with steam at high temperatures to form iron oxide and evolve hydrogen gas.

- Liquid sodium is used as a coolant in nuclear reactors: True. Liquid sodium has excellent thermal conductivity, which makes it an effective coolant for fast-breeder reactors.

- Metals are placed at the right-hand side of the periodic table: False. Metals are found on the left-hand side and in the center of the periodic table; non-metals and noble gases are found on the right.

- Rusting of iron increases its weight: True. Rusting involves iron reacting with oxygen and water, creating iron oxide, which adds to the original weight of the iron.

Option 2 (1, 2, 4) is correct.