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JEE CHEMISTRY MCQ: HYDROCARBONS

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Pure acetylene has sweet ethereal smell while impure smells like garlic due to presence of:

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Correct option: B

\mathrm{P}{\mathrm{H}_3}

Option B (

\mathrm{P}{\mathrm{H}_3}

) is correct because the garlic smell in impure acetylene is due to the presence of phosphine (

\mathrm{P}{\mathrm{H}_3}

) as an impurity.

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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

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