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Order of reactivity of the following dienes X, Y and Z in Diels-Alder reaction is<br><img src="/images/question-image/engineering-chemistry/basics-of-organic-reaction-mechanism/1689840792-order-of-reactivity-of-the-following-dienes.png" title="Basics of Organic Reaction Mechanism mcq question image" alt="Basics of Organic Reaction Mechanism mcq question image">
A
X > Z > Y
B
Y > X > Z
C
Y > Z > X
D
X > Y > Z
Correct Answer:
X > Y > Z
The decreasing order of the reactivity of the following compounds towards electrophiles is
A
II > I > III
B
II > III > I
C
III > I > II
D
I > II > III
Which of the statements is correct about the mechanism of the following reaction?
A
DMSO reacts with the alcohol initially to give<br> <img src="/images/option-image/engineering-chemistry/basics-of-organic-reaction-mechanism/1690014825-34-1.png" title="Basics of Organic Reaction Mechanism mcq question image" alt="Basics of Organic Reaction Mechanism mcq question image"> which reacts with (COCl<sub>2</sub>)
B
(COCl<sub>2</sub>) reacts with the alcohol initially to give<br> <img src="/images/option-image/engineering-chemistry/basics-of-organic-reaction-mechanism/1690014272-34-2.png" title="Basics of Organic Reaction Mechanism mcq question image" alt="Basics of Organic Reaction Mechanism mcq question image"> which reacts with DMSO
C
DMSO reacts with (COCl)<sub>2</sub> initially to give<br> <img src="/images/option-image/engineering-chemistry/basics-of-organic-reaction-mechanism/1690014850-34-3.png" title="Basics of Organic Reaction Mechanism mcq question image" alt="Basics of Organic Reaction Mechanism mcq question image"> which reacts with the alcohol
D
(COCl<sub>2</sub>) reacts with DMSO initially to give<br> <img src="/images/option-image/engineering-chemistry/basics-of-organic-reaction-mechanism/1690014865-34-4.png" title="Basics of Organic Reaction Mechanism mcq question image" alt="Basics of Organic Reaction Mechanism mcq question image"> which reacts with the alcohol
In the reaction,
if the concentration of both the reagents is doubled then the rate of the reaction will
A
remain unchanged
B
quadruple
C
reduce to one fourth
D
double
The correct order of-the basicity of the following compounds is
A
IV > III > II > I
B
III > IV > I > II
C
IV > III > I > II
D
III > IV > II > I
The decreasing order of acidity of the marked H of the following molecules is
A
I > II > III
B
III > I > II
C
III > II > I
D
II > I > III
The increasing order of basicity among the following is
A
[ <p><span>A. Y <p><span>B. Y
B
X
C
X
In the reaction sequence,
X and Y respectively are
A
<img src="/images/option-image/engineering-chemistry/basics-of-organic-reaction-mechanism/1690023864-82-1.png" title="Basics of Organic Reaction Mechanism mcq question image" alt="Basics of Organic Reaction Mechanism mcq question image">
B
<img src="/images/option-image/engineering-chemistry/basics-of-organic-reaction-mechanism/1690023883-82-2.png" title="Basics of Organic Reaction Mechanism mcq question image" alt="Basics of Organic Reaction Mechanism mcq question image">
C
<img src="/images/option-image/engineering-chemistry/basics-of-organic-reaction-mechanism/1690023903-82-3.png" title="Basics of Organic Reaction Mechanism mcq question image" alt="Basics of Organic Reaction Mechanism mcq question image">
D
<img src="/images/option-image/engineering-chemistry/basics-of-organic-reaction-mechanism/1690023919-82-4.png" title="Basics of Organic Reaction Mechanism mcq question image" alt="Basics of Organic Reaction Mechanism mcq question image">
The reaction between X and Y to give Z proceeds via
A
4π-conrotatory opening of X followed by endo Diels-Alder cycloaddition
B
4π-disrotatory opening of X followed by endo Diels-Alder cycloaddltion
C
4π-conrotatory opening of X followed by exo Diels-Alder cycloaddition
D
4π-disrotatory opening of X followed by exo Diels-Alder cycloadditlon
The major product of the following reaction is
A
<img src="/images/option-image/engineering-chemistry/basics-of-organic-reaction-mechanism/1690530508-18-1.png" title="Basics of Organic Reaction Mechanism mcq question image" alt="Basics of Organic Reaction Mechanism mcq question image">
B
<img src="/images/option-image/engineering-chemistry/basics-of-organic-reaction-mechanism/1690530521-18-2.png" title="Basics of Organic Reaction Mechanism mcq question image" alt="Basics of Organic Reaction Mechanism mcq question image">
C
<img src="/images/option-image/engineering-chemistry/basics-of-organic-reaction-mechanism/1690530532-18-3.png" title="Basics of Organic Reaction Mechanism mcq question image" alt="Basics of Organic Reaction Mechanism mcq question image">
D
<img src="/images/option-image/engineering-chemistry/basics-of-organic-reaction-mechanism/1690530544-18-4.png" title="Basics of Organic Reaction Mechanism mcq question image" alt="Basics of Organic Reaction Mechanism mcq question image">
For the aldotetroses I-IV, the combination of true statements, among P-T, is
P = I and II are diastereomers and II and III are enantiomers
Q = I and IV are mesomers and are optically inactive
R = I and III can be interconverted by a base catalysed isomerisation
S = only I and IV are HlO
4
cleavable
T = I and III are D-sugars and II and IV are L-sugars
A
Q, R, T
B
P, R, T
C
Q, R, S, T
D
P, Q, S
