1
JEE Main 2022 (Online) 25th July Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

$$20 \mathrm{~mL}$$ of $$0.1\, \mathrm{M} \,\mathrm{NH}_{4} \mathrm{OH}$$ is mixed with $$40 \mathrm{~mL}$$ of $$0.05 \mathrm{M} \mathrm{HCl}$$. The $$\mathrm{pH}$$ of the mixture is nearest to :

(Given : $$\mathrm{K}_{\mathrm{b}}\left(\mathrm{NH}_{4} \mathrm{OH}\right)=1 \times 10^{-5}, \log 2=0.30, \log 3=0.48, \log 5=0.69, \log 7=0.84, \log 11= 1.04)$$

A
3.2
B
4.2
C
5.2
D
6.2
2
JEE Main 2022 (Online) 25th July Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language

Match List I with List II

List I List II
(A) N$$_2$$(g) + 3H$$_2$$(g) $$ \to $$ 2NH$$_3$$(g) (I) Cu
(B) CO(g) + 3H$$_2$$(g) $$ \to $$ CH$$_4$$(g) + H$$_2$$O(g) (II) Cu/ZnO $$ - $$ Cr$$_2$$O$$_3$$
(C) CO(g) + H$$_2$$(g) $$ \to $$ HCHO(g) (III) Fe$$_x$$O$$_y$$ + K$$_2$$O + Al$$_2$$O$$_3$$
(D) CO(g) + 2H$$_2$$(g) $$ \to $$ CH$$_3$$OH(g) (IV) Ni

Choose the correct answer from the options given below :

A
$$(\mathrm{A})-(\mathrm{II}),(\mathrm{B})-(\mathrm{IV}),(\mathrm{C})-(\mathrm{I}),(\mathrm{D})-(\mathrm{III})$$
B
$$(\mathrm{A})-(\mathrm{II}),(\mathrm{B})-(\mathrm{I}),(\mathrm{C})-(\mathrm{IV}),(\mathrm{D})-(\mathrm{III})$$
C
$$(\mathrm{~A})-(\mathrm{III}),(\mathrm{B})-(\mathrm{IV}),(\mathrm{C})-(\mathrm{I}),(\mathrm{D})-(\mathrm{II})$$
D
$$(\mathrm{A})-(\mathrm{III}),(\mathrm{B})-(\mathrm{I}),(\mathrm{C})-(\mathrm{IV}),(\mathrm{D})-(\mathrm{II})$$
3
JEE Main 2022 (Online) 25th July Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

The IUPAC nomenclature of an element with electronic configuration [Rn] $$5 \mathrm{f}^{14} 6 \mathrm{d}^{1} 7 \mathrm{s}^{2}$$ is :

A
Unnilbium
B
Unnilunium
C
Unnilquadium
D
Unniltrium
4
JEE Main 2022 (Online) 25th July Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language

The compound(s) that is (are) removed as slag during the extraction of copper is :

(A) CaO

(B) FeO

(C) Al2O3

(D) ZnO

(E) NiO

Choose the correct answer from the options given below:

A
(C), (D) only
B
(A), (B), (E) only
C
(A), (B) only
D
(B) only
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