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JEE CHEMISTRY MCQ: HYDROCARBONS
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Medium
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Analyzing
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Assertion :-Ethyne and its derivatives give white precipate with ammonical silver nitrate solution.
Reason :- Alkynes gives white ppt with ammonical silver nitrate solution due to nucleophilic substitution reaction.
Reason :- Alkynes gives white ppt with ammonical silver nitrate solution due to nucleophilic substitution reaction.
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Correct option: D
If both Assertion & Reason are false
The correct answer is D (If both Assertion & Reason are false) because alkynes react with ammoniacal silver nitrate via an acid-base reaction, not nucleophilic substitution, and only terminal alkynes give a precipitate.
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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: