Multiple Choice QuestionsCommercial sample of H2O2 is labeled as 10 V. Its % strength is nearly
3
6
9
12
A.
3
'10 V of H2O2' means 1 L of this solution will produce 10 L O2 at STp.
22.4 L of O2 is obtained from H2O2 = 68 gm
10 L of O2 will be obtained from =
H2O2 = = 30.36 gm
1000 mL of the given solution containes 30.36 gm H2O2 and 100 mL of the given solution contains
=
= 3.03 gm H2O2
Thus, % strength of H2O2 is 3.03 (≈3).
The order of decreasing ease of abstraction of hydrogen atoms in the following molecule
Ha > Hb > Hc
Ha > Hc > Hb
Hb > Ha > Hc
Hc > Hb > Ha
Among the following statements about the molecules X and Y, the one(s) which correct is (are)
X and Y are diastereomers
X and Y are enantiomers
X and Y are both aldohexoses
X is a D-sugar and Y is an L-sugar
The electronic configuration of Cu is
[Ne] 3s2, 3p6, 3d9, 4s2
[Ne] 3s2, 3p6, 3d10, 4s1
[Ne] 3s2, 3p6, 3d3, 3d9, 4s2, 4p6
[Ne] 3s2, 3p6, 3d5, 4s2, 4p4
The rate of a certain reaction is given by, rate = k [H+]n. The rate increases 100 times when the pH changes from 3 to 1. The order (n) of the reaction is
2
0
1
1.5
The correct statement regarding the following energy diagrams is
Reaction M is faster and less exothermic than reaction N
Reaction M is slower and less exothermic than reaction N
Reaction M is faster and more exothermic than reaction N
Reaction M is slower and more exothermic than reaction N
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