Less reactive metals such as magnesium, aluminum, zinc, and iron react with steam to liberate dihydrogen gas.

True

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False

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Solution

The correct option is A True
Less reactive metals such as magnesium, aluminum, zinc, and iron react with steam to liberate dihydrogen gas.
Metals + steam $\to$ Metal oxides + Hydrogen

Examples: When magnesium reacts with steam, it produces magnesium oxide and hydrogen gas

$M g + 2 H_{2} O \to M g (O H)_{2} + H_{2}$

When Aluminum reacts with steam, it produces Aluminum oxide and hydrogen gas

$2 A l + 3 H_{2} O \to A l_{2} O_{3} + 3 H_{2}$

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Similar questions

On the basis of the reactivity series of metals, predict how these metals will react with each of the following salt solutions:

Metals: magnesium, zinc, copper, iron, and potassium

Salt solutions: magnesium sulphate, zinc sulphate, copper sulphate, iron sulphate,and potassium sulphate

Q. Which sequence indicates correctly the increasing reactivity of metals?
(a) iron, zinc, magnesium, sodium, potassium
(b) sodium, potassium, magnesium, zinc, iron
(c) magnesium, potassium, sodium, iron, zinc
(d) iron, zinc, sodium, magnesium, potassium

Q. Metal which does not react with cold water but reacts with steam to liberate

H_{2}

gas is :

Q. Reactive metals react with dilute

H C l

to liberate:

From the metals copper, iron, magnesium, sodium and zinc, select a different metal in each case which:
(i) does not react with dilute hydrochloric acid.
(ii) can form 2+ and 3+ ions.
(iii) has a hydroxide that reacts with both acids and alkalis.
(iv) does not react with cold water but reacts with steam when heated.
Arrange the metals in increasing order of reactivity.

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