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Reaction of Metals with Water

Aluminium rea...

Question

Aluminium reacts with steam to produce a layer that protects it from further reaction. Enter the name of the compound (text) here: ___.

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Solution

Aluminium reacts with the steam to produce a thick oxide layer of aluminium oxide ( $A l_{2} O_{3}$ ) which protects it from further reaction.

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Q. Assertion :Aluminium containers used to transport nitric acid Reason: Concentrated

H N O_{3}

renders aluminium passive by forming a thin strong protective oxide layer. This protective layer prevents further reaction with the acid.

Q. Which of the following option is correct?

Statement 1: Articles made of aluminium do not corrode even though it is an active metal
Statement 2: Aluminium reacts with air to form a layer of oxide due to which it does not react further.

Q. Assertion :Reactivity of Al decreases if it is dipped in

H N O_{3}

. Reason: Nitric acid is a good oxidising agent, and so this causes a thickening of the oxide layer, further protecting the aluminium from reaction.

Q. From amongst the metals sodium, calcium, aluminium, copper and magnesium, name the metal:
(a) which reacts with water only on boiling, and
(b) another which does not react even with steam.

Q. Name the gas produced when hydrocarbons(alkanes) react with steam.

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Reaction of Metals with Water

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