CBSE
Multiple Choice QuestionsAssertion : CN- ion is an ambident nucleophile.
Reason: Nucleophiles are electron rich species.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false
If both assertion and reason are false
Assertion : 1, 2-dichloroethane is optically active.
Reason : Meso compound is optically active.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Arrange the following compounds in increasing order of reactivity towards nucleophilic addition reaction.
(I) C6H5COCH3
(II) CH3CO-C2H5
(III) C6H5CHO
(IV) Cl-CH2-CHO
IV > III > II > I
IV > II > III > I
I > II > III > IV
III > IV > II > I
In the reaction , 
A , the major product A is :
Calcium burns in nitrogen to produce a white powder which dissolves in sufficient water to produce a gas A and an alkaline solution .The solution on exposure to air produces a thin solid layer of B on the surface .The compounds A and B will be :
Ca3N2 , NH3
NH3 , CO2
Ca(OH)2 , CaCO3
NH3 , CaCO3
KI and CusO4 solution when mixed gives :
CuI2 + K2SO4
Cu2I2 + K2SO4 + I2
K2SO4 + Cu2I2 + I2
K2SO4 + CuI2 + I2
Assertion : Phosphoric acid has no reducing properties.
Reason : Phosphoric acid does not contain P-H bonds.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Number of isomers of C5H6
2
3
4
5
Which of the following compounds are optically active?
1 and 2
2 and 3
3 and 4
1 and 4
Which of the following is aromatic?
