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Chapter 2: Problem 110

The reagent that does not react with ethyne is (a) Ammoniacal \(\mathrm{AgNO}_{3}\) (b) \(\mathrm{NaOH}\) (c) \(\mathrm{HCl}\) (d) Na

Short Answer

Expert verified
a. Ammoniacal \(\mathrm{AgNO}_{3}\) b. \(\mathrm{NaOH}\) c. \(\mathrm{HCl}\) d. Sodium (Na) Answer: d. Sodium (Na)

Step by step solution

01

Examining reactivity with Ammoniacal \(\mathrm{AgNO}_{3}\)

When ethyne (\(\mathrm{C}_{2}\mathrm{H}_{2}\)) reacts with ammoniacal \(\mathrm{AgNO}_{3}\), it forms a white precipitate of \(\mathrm{Ag}_{2}\mathrm{C}_{2}\) and releases \(\mathrm{N}_{2}\) gas. So, ethyne does react with ammoniacal \(\mathrm{AgNO}_{3}\).
02

Examining reactivity with \(\mathrm{NaOH}\)

Ethyne reacts with a basic solution of sodium hydroxide (\(\mathrm{NaOH}\)) to form a sodium acetylide salt and water. This is an acid-base reaction, so ethyne does react with \(\mathrm{NaOH}\).
03

Examining reactivity with \(\mathrm{HCl}\)

Ethyne reacts with hydrochloric acid (\(\mathrm{HCl}\)) to form chloroethane via electrophilic addition reaction. Therefore, ethyne does react with \(\mathrm{HCl}\).
04

Examining reactivity with Sodium (Na)

Ethyne does not react with sodium (Na) directly as there is no suitable reaction pathway. Thus, sodium (Na) is the reagent that does not react with ethyne.
05

Answer

The reagent that does not react with ethyne is (d) Sodium (Na).

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