Assertion : The nuclear isomers are the atoms with the same atomic number and same mass number, but with different radioactive properties.
Reason : The nucleus in the excited state will evidently have a different half-life as compared to that in the ground state
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 : 2,3-Dimethylbut-2-ene is more stable than but-2-ene.
Reason : Six hyperconjugation structures can be written for 2, 3-dimethylbut-2-ene while but-2-ene has twelve.
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.
Which of the following compounds is expected to be optically active ?
(CH3)2CHCHO
CH3CH2CH2CHO
CH3CH2CHBrCHO
CH3CH2CBr2CHO
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