Chemistry
Assertion (A): On adding ammoniacal silver nitrate to ethyne, it gives a white precipitate.
Reason (R): The above reaction forms silver acetylide.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Organic Chemistry
4 Likes
Answer
Both A and R are true and R is the correct explanation of A.
Explanation— Ethyne (HC≡CH) reacts with ammoniacal silver nitrate to give a white precipitate of silver acetylide (AgC≡CAg). Thus Assertion (A) is correct. The precipitate’s identity—silver acetylide—explains why the white solid appears, so Reason (R) is also true and provides the correct explanation for the assertion.
Answered By
2 Likes
Related Questions
Assertion (A): The brown colour of bromine fades when it is added to ethylene.
Reason (R): Ethylene shows substitution reactions.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Assertion (A): Acetylene burns with a sooty flame.
Reason (R): Acetylene contains a greater carbon content.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Assertion (A): Carboxylic acids react with alcohol in presence of concentrated H2SO4 to produce a fruity smell.
Reason (R): It is due to the formation of an aldehyde.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Choose the correct word/phrase from within the brackets to complete the following sentences:
(i) The catalyst used for conversion of ethene to ethane is commonly …………… (nickel/iron/cobalt)
(ii) When acetaldehyde is oxidized with acidified potassium dichromate, it forms …………… (ester / ethanol / acetic acid)
(iii) Ethanoic acid reacts with ethanol in the presence of concentrated H2SO4, so as to form a compound and water. The chemical reaction which takes place is called …………… (dehydration/hydrogenation/esterification)
(iv) Write the equation for the reaction taking place between 1,2-dibromoethane and alcoholic potassium hydroxide.
(v) The product formed when ethene gas reacts with water in the presence of sulphuric acid …………… (ethanol / ethanal / ethanoic acid)