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

Refining using liquation method is the most suitable for metals with :

A
Low melting point
B
High boiling point
C
High electrical conductivity
D
Less tendency to be soluble in melts than impurities
2
JEE Main 2022 (Online) 26th July Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language

Which of the following can be used to prevent the decomposition of $$\mathrm{H}_{2} \mathrm{O}_{2}$$ ?

A
Urea
B
Formaldehyde
C
Formic acid
D
Ethanol
3
JEE Main 2022 (Online) 26th July Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language

Reaction of $$\mathrm{BeCl}_{2}$$ with $$\mathrm{LiAlH}_{4}$$ gives :

(A) $$\mathrm{AlCl}_{3}$$

(B) $$\mathrm{BeH}_{2}$$

(C) $$\mathrm{LiH}$$

(D) $$\mathrm{LiCl}$$

(E) $$\mathrm{BeAlH}_{4}$$

Choose the correct answer from options given below :

A
(A), (D) and (E)
B
(A), (B) and (D)
C
(D) and (E)
D
(B), (C) and (D)
4
JEE Main 2022 (Online) 26th July Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language

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