1
JEE Main 2022 (Online) 26th July Evening Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language

The metal that is not extracted from its sulfide ore is :

A
Aluminium
B
Iron
C
Lead
D
Zinc
2
JEE Main 2022 (Online) 26th July Evening Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
The products obtained from a reaction of hydrogen peroxide and acidified potassium permanganate are :
A
$$\mathrm{Mn}^{4+}, \mathrm{H}_{2} \mathrm{O}$$ only
B
$$\mathrm{Mn}^{2+}, \mathrm{H}_{2} \mathrm{O}$$ only
C
$$\mathrm{Mn}^{4+}, \mathrm{H}_{2} \mathrm{O}, \mathrm{O}_{2}$$ only
D
$$\mathrm{Mn}^{2+}, \mathrm{H}_{2} \mathrm{O}, \mathrm{O}_{2}$$ only
3
JEE Main 2022 (Online) 26th July Evening Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language

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

Assertion A: $$\mathrm{LiF}$$ is sparingly soluble in water.

Reason R: The ionic radius of $$\mathrm{Li}^{+}$$ ion is smallest among its group members, hence has least hydration enthalpy.

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

A
Both A and R are true and R is the correct explanation of A.
B
Both A and R are true but R is NOT the correct explanation of A.
C
A is true but R is false.
D
A is false but R is true.
4
JEE Main 2022 (Online) 26th July Evening Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language

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

Assertion : Boric acid is a weak acid.

Reason R : Boric acid is not able to release $$\mathrm{H}^{+}$$ ion on its own. It receives $$\mathrm{OH}^{-}$$ ion from water and releases $$\mathrm{H}^{+}$$ ion.

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

A
Both A and R are true and R is the correct explanation of A.
B
Both A and R are true but R is NOT the correct explanation of A.
C
A is correct but R is not correct.
D
A is not correct but R is correct.
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