JEE Main 2022 (Online) 24th June Morning Shift | Isolation of Elements Question 39 | Chemistry

JEE Main 2022 (Online) 24th June Morning Shift

MCQ (Single Correct Answer)

-1

Match List - I with List - II :

	List - I		List -II
(A)	Sphalerite	(I)	FeCO$$_3$$
(B)	Calamine	(II)	PbS
(C)	Galena	(III)	ZnCO$$_3$$
(D)	Siderite	(IV)	ZnS

Choose the most appropriate answer from the options given below :

(A)-(IV), (B)-(III), (C)-(II), (D)-(I)

(A)-(IV), (B)-(I), (C)-(II), (D)-(III)

(A)-(II), (B)-(III), (C)-(I), (D)-(IV)

(A)-(III), (B)-(IV), (C)-(II), (D)-(I)

JEE Main 2021 (Online) 1st September Evening Shift

MCQ (Single Correct Answer)

-1

Calamine and Malachite, respectively, are the ores of :

Nickel and Aluminium

Zinc and Copper

Copper and Iron

Aluminium and Zinc

JEE Main 2021 (Online) 31st August Morning Shift

MCQ (Single Correct Answer)

-1

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A) : Aluminium is extracted from bauxite by the electrolysis of molten mixture of Al₂O₃ with cryolite.

Reason (R) : The oxidation state of Al in cryolite is +3.

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

(A) is true but (R) is false.

(A) is false but (R) is true.

Both (A) and (R) are correct and (R) is the correct explanation of (A)

Both (A) and (R) are correct but (R) is not the correct explanation of (A)

JEE Main 2021 (Online) 31st August Morning Shift

MCQ (Single Correct Answer)

-1

Given below are two statements :

Statement I : The process of producing syn-gas is called gasification of coal.

Statement II : The composition of syn-gas is CO + CO₂ + H₂ (1 : 1 : 1)

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

Statement I is false but Statement II is true

Statement I is true but Statement II is false

Both Statement I and Statement II are false

Both Statement I and Statement II are true

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