CBSE
Multiple Choice QuestionsCommercial sample of H2O2 is labeled as 10 V. Its % strength is nearly
3
6
9
12
The reagent with which the following reaction is best accomplished is
H3PO2
H3PO3
H3PO4
NaHSO3
In the hydrolysis of an organic chloride in presence of large excess of water
RCl + H2O → ROH + HCl
molecularity and order of reaction both are 2
molecularity is 2 but order of reaction is 1
molecularity is 1 but order of reaction is 2
molecularity is 1 but order of reaction is also 1
In which of the following molecules is hydrogen bridge bond present?
Water
Inorganic benzene
Diborane
Methanol
Assertion : Increasing pressure on pure water decreases its freezing point.
Reason : Density of water is minimum at 273 K.
If both assertion and reason are true and the reason is the correct explanation of the assertion.
If both assertion and reason are true and the reason is not the correct explanation of the assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
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
When H2O2 is shaken with an acidified solution of K2Cr2O7 in the presence of ether, the ethereal layer turns blue due to the formation of:
Cr2O3
CrO42-
Cr2(SO4)3
CrO5
Assertion : The micelle formed by sodium stearate in water has - COO- groups at the surface.
Reason : Surface tension of water is reduced by the addition of stearate.
If both assertion and reason are true and the reason is the correct explanation of the assertion.
If both assertion and reason are true and the reason is not the correct explanation of the assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Ortho and para hydrogens have
Identical chemical properties but different physical properties
Identical physical and chemical properties
Identical physical properties but different chemical properties
Different chemical and physical properties
Blackened oil painting can be restored into original form by the action of
Cl2
BaO2
H2O2
MnO2
