1
JEE Main 2022 (Online) 28th June Morning Shift
+4
-1

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

Assertion A : Magnesium can reduce Al2O3 at a temperature below 1350$$^\circ$$C, while above 1350$$^\circ$$C, while above 1350$$^\circ$$C aluminium can reduce MgO.

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

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

A
Both A and R are correct, and R is correct explanation of A.
B
Both A and R are correct, but R is NOT the correct explanation of A.
C
A is correct R is not correct.
D
A is not correct, R is correct.
2
JEE Main 2022 (Online) 27th June Evening Shift
+4
-1

Statement I : Leaching of gold with cyanide ion in absence of air / O2 leads to cyano complex of Au(III).

Statement II : Zinc is oxidized during the displacement reaction carried out for gold extraction.

In the light of the above statements, choose the correct answer from the options given below.

A
Both Statement I and Statement II are correct.
B
Both Statement I and Statement II are incorrect.
C
Statement I is correct but Statement II is incorrect.
D
Statement I is incorrect but Statement II is correct.
3
JEE Main 2022 (Online) 27th June Morning Shift
+4
-1

Match List-I with List-II

List - I List - II
(A) Concentration of gold ore (I) Aniline
(B) Leaching of alumina (II) NaOH
(C) Froth stabiliser (III) SO$$_2$$
(D) Blister copper (IV) NaCN

Choose the correct answer from the options given below :

A
(A) - (IV), (B) - (III), (C) - (II), (D) - (I)
B
(A) - (IV), (B) - (II), (C) - (I), (D) - (III)
C
(A) - (III), (B) - (II), (C) - (I), (D) - (IV)
D
(A) - (II), (B) - (IV), (C) - (III), (D) - (I)
4
JEE Main 2022 (Online) 27th June Morning Shift
+4
-1

Which of the following is structure of a separating funnel?

A
B
C
D
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