Statement 1: The reaction of iron(III) oxide ( ${F e}_{2} O_{3}$ ) with aluminium is used to join railway tracks or cracked machine parts.
Statement 2: Some of the displacement reactions are highly exothermic reactions.

(a) Statement 1 is true, but statement 2 is false.
(b) Statement 1 is false but statement 2 is true.
(c) Statement 1 and 2 both are true but 2 is not the correct explanation of 1.
(d) Statement 1 and 2 both are true and 2 is the correct explanation of 1.

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Solution

The correct is option 'd' i.e. statement 1 and 2 both are true and 2 is the correct explanation of 1.
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${F e}_{2} O_{3} (s)$ + $2 A l (s)$ → $2 F e (l)$ + ${A l}_{2} O_{3} (s)$ + $H e a t$
In this reaction aluminium is displacing iron from iron oxide. This displacement reaction is accompanied by evolution of large amount of heat which is utilised in melting the displaced iron. This molten iron is used to join railway tracks or cracked machine parts.

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Similar questions

Statement 1: The reaction of iron(III) oxide ${F e}_{2} O_{3}$ with aluminium is used to join railway tracks or cracked machine parts.
Statement 2: Some of the displacement reactions are highly exothermic reactions.

Q. Statement 1: An acid reacts with a base to form salt and water, this type of reaction is known as neutralisation reaction.
Statement 2: Neutralisation reaction are exothermic reaction.

The correct statement for neutralisation reaction is:
(a) Both the statements are true, and statement 2 is the correct explanation for statement 1
(b) Both the statements are true, but statement 2 is not the correct explanation for statement 1
(c) Statement 1 is true, but statement 2 is false
(d) Statement 2 is true, but statement 1 is false
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C - O

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STATEMENT-2: In phenols, the

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