CBSE
Which of the compound is optically active ?
1 - butanol
Ethanol
2 - butanol
Isopropyl alcohol
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.
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.
Which of the following compounds is expected to be optically active ?
(CH3)2CHCHO
CH3CH2CH2CHO
CH3CH2CHBrCHO
CH3CH2CBr2CHO
Which is the strongest acid ?
ClCH2COOH
CH3COOH
Cl2CHCOOH
CCl3COOH
The two isomers given below are :
enantiomers
diastereomers
mesomers
position isomers
Which of the following radioisotopes is used as anticancerous?
Na-24
C-14
U-235
Co-60
CH3(CH2)4CH3
What is D?
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 : 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.