Chemistry
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)
Answer
(i) The catalyst used for conversion of ethene to ethane is commonly nickel.
(ii) When acetaldehyde is oxidized with acidified potassium dichromate, it forms 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 esterification
(iv) Reaction between 1, 2 – dibromoethane and alcoholic potassium hydroxide:
(v) The product formed when ethene gas reacts with water in the presence of sulphuric acid is ethanol.
Related Questions
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.
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.
From the following organic compounds given below, choose one compound in each case which relates to the description [i] to [iv]:
[Ethyne, ethanol, acetic acid, ethene, methane].
(i) An unsaturated hydrocarbon used for welding purposes.
(ii) An organic compound whose functional group is carboxyl.
(iii) A hydrocarbon which on catalytic hydrogenation gives a saturated hydrocarbon.
(iv) An organic compound used as a thermometric liquid.
Name the following:
(i) Process by which ethane is obtained from ethene.
(ii) A hydrocarbon which contributes towards the greenhouse effect.
(iii) Distinctive reaction that takes place when ethanol is treated with acetic acid.
(iv) The property of elements by virtue of which atoms of the element can link to each other in the form of a long chain or ring structure.
(v) Reaction when an alkyl halide is treated with alcoholic potassium hydroxide.