The correct order of stability of the superoxides is
KO2 > RbO2 > CsO2
KO2 > CsO2 > RbO2
CsO2 > RbO2 > KO2
RbO2 > CsO2 > KO2
How many geometrical isomers are possible in the following two alkenes ?
(i) CH3 - CH = CH - CH = CH - CH3
(ii) CH3 - CH = CH - CH = CH - Cl
4 and 4
4 and 3
3 and 3
3 and 4.
D.
3 and 4.
When the ends of alkene containing n double bonds are different, the number of geometrical isomers is 2n. Thus, for CH3 -CH = CH - CH = CH - Cl
Number of geometrical isomers = 22 = 4
When the ends of alkene containing n double bonds are same, then the number of geometrical isomers = 2n-1 + 2p-1
(where p = for even n and for odd n)
Thus, for CH3 - CH = CH - CH = CH - CH3
Number of geometrical isomers = 22-1 + = 21 + 20 = 2 + 1 = 3
Assertion : Electromeric effect is brought into play only at the requirement of the reagent.
Reason : It is a temporary effect in which bond pair is shifted to one of the constituent atoms.
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: Cis-2-butene gives meso-2, 3-butanediol with dilute alkaline KMnO4 solution.
Reason : Dilute alkaline KMnO4 solution gives trans addition with alkenes.
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 : The presence of Ag+ enhances the solubility of alkenes in water.
Reason : Alkenes are weakly polar in nature.
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