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JEE CHEMISTRY MCQ: HYDROCARBONS
1
Medium
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Analyzing
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Which of the following statement is incorrect regarding nitration of aromatic compounds?
I. The rate of nitration of benzene decreases at 323-333 K.
II. The rate of nitration of toluene is greater than that of benzene.
III. The rate of nitration of chlorobenzene is greater than that of benzene.
IV. Nitration is an electrophilic substitution reaction. Choose the incorrect statement.
I. The rate of nitration of benzene decreases at 323-333 K.
II. The rate of nitration of toluene is greater than that of benzene.
III. The rate of nitration of chlorobenzene is greater than that of benzene.
IV. Nitration is an electrophilic substitution reaction. Choose the incorrect statement.
View answer and explanation
Correct option: B
Both I and III
Option B (Both I and III) is correct because the rate of nitration of benzene increases with temperature, and the rate of nitration of chlorobenzene is lower than that of benzene due to the -I effect of chlorine.
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In benzene, there is a delocalisation of π-electrons. Hence, each π-electron is attached by….carbon nuclei.
Which statement is false?
Assertion (A) In comparison to ethyl chloride, it is not easy to carry outnucleophilic substitution on vinyl chloride.
Reason (R) Vinyl group is an electron donating. If 2-oxopropanal and methanal are obtained by the reductive ozonolysis of compound (A), then the number of -bonds presents in Fischer-Tropsch process is used in the manufacture of:
Reason (R) Vinyl group is an electron donating. If 2-oxopropanal and methanal are obtained by the reductive ozonolysis of compound (A), then the number of -bonds presents in Fischer-Tropsch process is used in the manufacture of:
