Explore topic-wise MCQs in Engineering Chemistry.

This section includes 21 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering Chemistry knowledge and support exam preparation. Choose a topic below to get started.

1.

The formula of enantiomeric excess is ____________

A. [(d+l)/(d-l)]*100
B. [(d)/(d+l)]*100
C. [(d-l)/(d)]*100
D. /(d+l)]*100c) [(d-l)/(d)]*100d) [(d-l)/(d+l)]*100
Answer» D. /(d+l)]*100c) [(d-l)/(d)]*100d) [(d-l)/(d+l)]*100
Discussion
2.

Optical purity is defined as the ____________

A. Ratio of rotation of pure enantiomer to rotation of mixture
B. Ratio of rotation of mixture to rotation of pure enantiomer
C. Product of rotation of mixture and rotation of pure enantiomer
D. Sum of rotation of mixture and rotation of pure enantiomer
Answer» C. Product of rotation of mixture and rotation of pure enantiomer
Discussion
3.

Under SN2 conditions, on reaction with NaOH, (S)-2-bromo octane gives (R)-2-octanol. This is an example of ____________

A. Dynamicselective
B. Stereoselective
C. Regioselective
D. Stereospecific
Answer» E.
Discussion
4.

Under SN2 conditions, on reaction with NaOH, (R)-2-bromo octane gives ____________

A. (S)-2-octanol
B. (R)-2-octanol
C. Trans-2-butene
D. Cis-2-butene
Answer» B. (R)-2-octanol
Discussion
5.

R – C = C – R reacts in the presence of lindlar catalyst to give a syn product. This is an example of ____________

A. Dynamicselective
B. Stereoselective
C. Regioselective
D. Stereospecific
Answer» C. Regioselective
Discussion
6.

Reaction of (±) 2,3- dibromobutane is slower than meso in which the two methyl groups are ____________

A. Skew
B. Anti
C. Gauche
D. Partially eclipsed
Answer» E.
Discussion
7.

The reaction in which stereochemically different molecules react differently is called ____________

A. Dynamicselective
B. Stereoselective
C. Regioselective
D. Stereospecific
Answer» E.
Discussion
8.

The reaction that yields predominantly one enantiomer of a possible pair is called ____________

A. Dynamicselective
B. Stereoselective
C. Regioselective
D. Stereospecific
Answer» C. Regioselective
Discussion
9.

The reaction which gives exclusively one of several possible isomeric products is called ____________

A. Dynamicselective
B. Stereoselective
C. Regioselective
D. Stereospecific
Answer» D. Stereospecific
Discussion
10.

UNDER_SN2_CONDITIONS,_ON_REACTION_WITH_NAOH,_(R)-2-BROMO_OCTANE_GIVES?$

A. (S)-2-octanol
B. (R)-2-octanol
C. Trans-2-butene
D. Cis-2-butene
Answer» B. (R)-2-octanol
Discussion
11.

Optical purity is defined as the$

A. Ratio of rotation of pure enantiomer to rotation of mixture
B. Ratio of rotation of mixture to rotation of pure enantiomer
C. Product of rotation of mixture and rotation of pure enantiomer
D. Sum of rotation of mixture and rotation of pure enantiomer
Answer» C. Product of rotation of mixture and rotation of pure enantiomer
Discussion
12.

Under_SN2_conditions,_on_reaction_with_NaOH,_(S)-2-bromo_octane_gives_(R)-2-octanol._This_is_an_example_of
A. Dynamicselective
B. Stereoselective
C. Regioselective
D. Stereospecific
Answer» E.
Discussion
13.

The_formula_of_enantiomeric_excess_is

A. [(d+l)/(d-l)]*100
B. [(d)/(d+l)]*100
C. [(d-l)/(d)]*100
D. [(d-l)/(d+l)]*100
Answer» D. [(d-l)/(d+l)]*100
Discussion
14.

R – C = C – R reacts in the presence of lindlar catalyst to give syn product. This is an example o?#

A. Dynamicselective
B. Stereoselective
C. Regioselective
D. Stereospecific
Answer» C. Regioselective
Discussion
15.

Dynamic stereochemistry helps in correlating conformation and reactivity and in stereoselective synthesis.

A. True
B. False
Answer» B. False
Discussion
16.

Reaction of (±) 2,3- dibromobutane is slower than meso in which the two methyl groups are$

A. Skew
B. Anti
C. Gauche
D. Partially eclipsed
Answer» E.
Discussion
17.

Which of the following is an example of regioselective reaction?

A. Debromination of 2,3- dibromobutane
B. 2-bromo octane with sodium hydroxide
C. Addition of HI to propylene
D. Debromination of meso dibromobutane
Answer» D. Debromination of meso dibromobutane
Discussion
18.

The reaction in which stereochemically different molecules react differently is called

A. Dynamicselective
B. Stereoselective
C. Regioselective
D. Stereospecific
Answer» E.
Discussion
19.

Stereoselectivity can be exhibited in various degrees.

A. True
B. False
Answer» B. False
Discussion
20.

The reaction that yields predominantly one enantiomer of a possible pair is called

A. Dynamicselective
B. Stereoselective
C. Regioselective
D. Stereospecific
Answer» C. Regioselective
Discussion
21.

The reaction which gives exclusively one of several possible isomeric products is called

A. Dynamicselective
B. Stereoselective
C. Regioselective
D. Stereospecific
Answer» D. Stereospecific
Discussion