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CBSE

Subject

Chemistry

NEET Chemistry : Organic Chemistry – Some Basic Principles and Techniques

Multiple Choice Questions

131.

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

132.

Which of the compound is optically active ?

1 - butanol
Ethanol
2 - butanol
Isopropyl alcohol

133.

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.

134.

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.

135.

CH₃(CH₂)₄CH₃ $\to_{773 K, 10 - 20 atm}^{{Cr}_{2} O_{3} / {Al}_{2} O_{3}} A \overset{{Br}_{2} / Fe}{\to} B \to_{ether}^{Mg} C \overset{H_{2} O}{\to} D$