1
JEE Main 2022 (Online) 25th July Evening Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
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High purity (> 99.95%) dihydrogen is obtained by :

A
reaction of zinc with aqueous alkali.
B
electrolysis of acidified water using platinum electrodes.
C
electrolysis of warm aqueous barium hydroxide solution between nickel electrodes.
D
reaction of zinc with dilute acid.
2
JEE Main 2022 (Online) 25th July Evening Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
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The correct order of density is :

A
Be > Mg > Ca > Sr
B
Sr > Ca > Mg > Be
C
Sr > Be > Mg > Ca
D
Be > Sr > Mg > Ca
3
JEE Main 2022 (Online) 25th July Evening Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language

The total number of acidic oxides from the following list is

NO, N2O, B2O3, N2O5, CO, SO3, P4O10

A
3
B
4
C
5
D
6
4
JEE Main 2022 (Online) 25th July Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

The correct order of energy of absorption for the following metal complexes is :

A : [Ni(en)3]2+ , B : [Ni(NH3)6]2+ , C : [Ni(H2O)6]2+

A
C < B < A
B
B < C < A
C
C < A < B
D
A < C < B
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