JEE Main 2022 (Online) 27th July Morning Shift | p-Block Elements Question 78 | Chemistry

1

JEE Main 2022 (Online) 27th July Morning Shift

MCQ (Single Correct Answer)

+4

-1

Out of Syllabus

Which oxoacid of phosphorous has the highest number of oxygen atoms present in its chemical formula?

A

Pyrophosphorus acid

B

Hypophosphoric acid

C

Phosphoric acid

D

Pyrophosphoric acid

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JEE Main 2022 (Online) 26th July Evening Shift

MCQ (Single Correct Answer)

+4

-1

Out of Syllabus

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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JEE Main 2022 (Online) 26th July Morning Shift

MCQ (Single Correct Answer)

+4

-1

Match List - I with List - II.

	List I (Processes / Reactions)		List II (Catalyst)
(A)	2SO$$_2$$(g) + O$$_2$$(g) $$ \to $$ 2SO$$_3$$(g)	(I)	Fe(s)
(B)	4NH$$_3$$(g) + 5O$$_2$$(g) $$ \to $$ 4NO(g) + 6H$$_2$$O(g)	(II)	Pt(s) $$ - $$ Rh(s)
(C)	N$$_2$$(g) + 3H$$_2$$(g) $$ \to $$ 2NH$$_3$$(g)	(III)	V$$_2$$O$$_5$$
(D)	Vegetable oil(l) + H$$_2$$ $$ \to $$ Vegetable ghee(s)	(IV)	Ni(s)

Choose the correct answer from the options given below :

A

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

B

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

C

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

D

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

4

JEE Main 2022 (Online) 26th July Morning Shift

MCQ (Single Correct Answer)

+4

-1

Out of Syllabus

Borazine, also known as inorganic benzene, can be prepared by the reaction of 3-equivalents of "$$X$$" with 6-equivalents of "$$Y$$". "$$X$$" and "$$Y$$", respectively are :

A

$$\mathrm{B}(\mathrm{OH})_{3}$$ and $$\mathrm{NH}_{3}$$

B

$$\mathrm{B}_{2} \mathrm{H}_{6}$$ and $$\mathrm{NH}_{3}$$

C

$$\mathrm{B}_{2} \mathrm{H}_{6}$$ and $$\mathrm{HN}_{3}$$

D

$$\mathrm{NH}_{3}$$ and $$\mathrm{B}_{2} \mathrm{O}_{3}$$