Alpha Question Bank for Engineering: Chemistry>Chapter 23 - Organic Chemistry- Some Basic Principles and Techniques>Exercise-4>Q 266

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Which reaction results in the formation of a pair of enantiomers?

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Important Questions on Organic Chemistry- Some Basic Principles and Techniques

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Alpha Question Bank for Engineering: Chemistry>Chapter 23 - Organic Chemistry- Some Basic Principles and Techniques>Exercise-4>Q 267

Which of the following reaction is/are not feasible?

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Alpha Question Bank for Engineering: Chemistry>Chapter 23 - Organic Chemistry- Some Basic Principles and Techniques>Exercise-4>Q 268

Which of the following reactions takes place by

{SN}^{2}

mechanism?

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Alpha Question Bank for Engineering: Chemistry>Chapter 23 - Organic Chemistry- Some Basic Principles and Techniques>Exercise-4>Q 269

The relative rates of nucleophilic substitution for the given substrates are as follows:

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Alpha Question Bank for Engineering: Chemistry>Chapter 23 - Organic Chemistry- Some Basic Principles and Techniques>Exercise-4>Q 270

Which of the following is/are correct regarding the given reaction?

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Alpha Question Bank for Engineering: Chemistry>Chapter 23 - Organic Chemistry- Some Basic Principles and Techniques>Exercise-4>Q 273

In the given reaction, the percentage of $(-)$ enantiomer formed is:

${CH}_{3} - CHI - {CH}_{2} - {CH}_{3} \overset{I^{-}}{⟶} {CH}_{3} - CHI - {CH}_{2} {CH}_{3} {(α)}_{obs} = - 15.90 ° {(α)}_{obs} = - 15.26 °$

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Alpha Question Bank for Engineering: Chemistry>Chapter 23 - Organic Chemistry- Some Basic Principles and Techniques>Exercise-4>Q 274

For the reaction:

R - X + {OH}^{-} ⟶ R - OH + X^{-}

, the rate expression is given as rate

= 6.0 \times 10^{- 5}

[R - X] [{OH}^{-}] + 2 \times 10^{- 7} [R - X] .

What percentage of

R - X

react by the

S_{N} 2

mechanism when

[{OH}^{-}] = 0.01

molar.

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Alpha Question Bank for Engineering: Chemistry>Chapter 23 - Organic Chemistry- Some Basic Principles and Techniques>Exercise-4>Q 275

In the presence of an anthraquinone derivative as a catalyst, the aqueous solution of sodium dithionite

{Na}_{2} S_{2} O_{4}

(Fieser's solution) effectively removes oxygen and forms

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Alpha Question Bank for Engineering: Chemistry>Chapter 23 - Organic Chemistry- Some Basic Principles and Techniques>Exercise-4>Q 276

Organic compounds sometimes adjust their electronic as well as steric structures to attain stability. Among the following, the compound having the highest dipole moment is :