امتیازی گروہوں کے تعاملات

Written by Dr. Ayesha Nadeem (Chemistry)

ایم ڈی کیٹ · کیمیا · 9 سوالات

نام: ____________________ تاریخ: ____________

A carboxylic acid reacts with an alcohol, in the presence of a little acid, to form:
- A An ester
- B An ether
- C An alkane
- D An aldehyde
Hydrolysis of an ester with sodium hydroxide solution is known as:
- A Esterification
- B Polymerisation
- C Saponification
- D Hydrogenation
Cold, dilute, alkaline potassium permanganate turns an alkene into a:
- A Diol
- B Alkane
- C Haloalkane
- D Ketone
Bromoethane reacts with aqueous sodium hydroxide to give mainly:
- A Ethanol
- B Ethane
- C Ethene
- D Ethanal
Which type of alcohol is hardest to oxidise with acidified dichromate?
- A All oxidise equally
- B Tertiary
- C Primary
- D Secondary
What is the functional group of an amine?
- A -CN
- B -COOH
- C -NO2
- D -NH2
What is the name of CH3CONH2?
- A Ethanamide
- B Ethanamine
- C Ethanoic acid
- D Ethyl amine
Polythene is made by polymerising:
- A Ethene
- B Ethyne
- C Ethane
- D Propene
Which of these compounds gives a positive iodoform test?
- A Ethanoic acid
- B Propan-1-ol
- C Methanol
- D Propanone

جوابی کلید

1. A, 2. C, 3. A, 4. A, 5. B, 6. D, 7. A, 8. A, 9. D

This reaction is called esterification, and water is also formed.
Alkaline hydrolysis of an ester gives an alcohol and the sodium salt of the acid. It is the basis of soap making.
It adds two OH groups across the double bond and the purple colour fades.
The hydroxide ion replaces bromine in a nucleophilic substitution reaction.
A tertiary alcohol has no hydrogen on the carbon carrying the OH group, so it resists oxidation.
Amines contain the amino group, -NH2, for primary amines.
It is an amide derived from ethanoic acid, so it is named ethanamide.
Ethene molecules join through their double bonds to form long chains of polythene.
The iodoform test is given by compounds containing a CH3-CO- group. Propanone has one.