JEE Main 2022 (Online) 25th July Morning Shift | p-Block Elements Question 85 | Chemistry

1

JEE Main 2022 (Online) 25th July Morning Shift

MCQ (Single Correct Answer)

+4

-1

Out of Syllabus

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

$$(\mathrm{A})-(\mathrm{III}),(\mathrm{B})-(\mathrm{I}),(\mathrm{C})-(\mathrm{IV}),(\mathrm{D})-(\mathrm{II})$$

2

JEE Main 2022 (Online) 25th July Morning Shift

MCQ (Single Correct Answer)

+4

-1

Out of Syllabus

The geometry around boron in the product 'B' formed from the following reaction is

$$ \begin{aligned} &\mathrm{BF}_{3}+\mathrm{NaH} \stackrel{450 \mathrm{~K}}{\rightarrow} \mathrm{A}+\mathrm{NaF} \\\\ &\mathrm{A}+\mathrm{NMe}_{3} \rightarrow \mathrm{B} \end{aligned} $$

A

trigonal planar

B

tetrahedral

C

pyramidal

D

square planar

3

JEE Main 2022 (Online) 25th July Morning Shift

MCQ (Single Correct Answer)

+4

-1

Out of Syllabus

The interhalogen compound formed from the reaction of bromine with excess of fluorine is a :

A

hypohalite

B

halate

C

perhalate

D

halite

4

JEE Main 2022 (Online) 30th June Morning Shift

MCQ (Single Correct Answer)

+4

-1

A $$\mathrel{\mathop{\kern0pt\longrightarrow} \limits_{}^{573\,K}} $$ Red phosphorus $$\mathrel{\mathop{\kern0pt\longrightarrow} \limits_{under\,pressure}^{heat\,;\,803\,K}} $$ B

Red phosphorus is obtained by heating "A" at 573 K, and can be converted to "B" by heating at 803 K under pressure.

A and B, respectively, are

A

$$\beta$$-black phosphorus and white phosphorus.

B

white phosphorus and $$\beta$$-black phosphorus.

C

$$\alpha$$-black phosphorus and white phosphorus.

D

white phosphorus and $$\alpha$$-black phosphorus.