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JEE CHEMISTRY MCQ: HYDROCARBONS

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Assertion (A): Benzene under goes nitration to form nitro benzene
Reason (R): Benzene nitration on electrophile is

{\text{NO}}_2^\Theta

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Correct option: C

A is correct, R is incorrect

Option C is correct because while benzene does undergo nitration to form nitrobenzene, the electrophile in the nitration reaction is

\mathrm{NO}_2^+

, not

\mathrm{NO}_2^-

.

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\mathrm{Ca}{\mathrm{C}_2} + {\mathrm{H}_2}\mathrm{O} \to X\xrightarrow{{{\mathrm{O}_3}/\frac{{{\mathrm{H}_2}\mathrm{O}}}{{\mathrm{O}{\mathrm{H}^ + }}}}}\mathrm{HCOOH} + \mathrm{HCOOH},X\;\mathrm{is}

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

\sigma

-bonds presents in Fischer-Tropsch process is used in the manufacture of: