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JEE Main 202228 JuneMorning Shift
Exam
JEE Main
Year
2022
Date
28 June
Shift
Morning Shift
Subject
Chemistry
Chapter
General Principles and Processes of Isolation of Metals

JEE Main 2022 · 28 June · Morning Shift · Chemistry · General Principles and Processes of Isolation of Metals

Given are two statements one is labelled as Assertion and other is...

Given are two statements one is labelled as Assertion and other is labelled as Reason.

Assertion: Magnesium can reduce Al2O3{Al}_{2}{O}_{3} at a temperature below 1350°C1350 ° C, while above 1350°C1350 ° C aluminium can reduce MgOMgO.

Reason: The melting and boiling points of magnesium are lower than those of aluminium.

In light of the above statements, choose most appropriate answer from the options given below

Given are two statements one is labelled as Assertion and other is labelled as Reason. Assertion : Magnesium can reduce

Options

  1. ABoth Assertion and Reason are correct, and Reason is correct explanation of Assertion.
  2. BBoth Assertion and Reason are correct, but Reason is NOT the correct explanation of Assertion.
  3. CAssertion is correct Reason is not correct.
  4. DAssertion is not correct, Reason is correct.

Correct answer

B. Both Assertion and Reason are correct, but Reason is NOT the correct explanation of Assertion.

Step-by-step solution

Given are two statements one is labelled as Assertion and other is labelled as Reason. Assertion : Magnesium can reduce

Mg Al
Melting point 924K924K 933K933K
Boiling point 1363K1363K 2740K2740K

it is true that magnesium (Mg) can reduce aluminium oxide (Al2O3)\left({Al}_{2}{O}_{3}\right) and aluminium can also reduce magnesium oxide. According to the Elingham diagram, we find that below 1350oC{1350}^{o}C, Mg can reduce aluminium oxide and when the temperature is above 1350oC{1350}^{o}C, Al can reduce magnesium oxide.

So, Both Assertion and Reason are correct, but Reason is NOT the correct explanation of Assertion.

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