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Organic Chemistry

Description: Engineering entrance
Number of Questions: 15
Created by:
Tags: Engineering entrance Aromatic Hydrocarbons Derivatives of Carboxylic Acids Preparation of Carboxylic Acids Ethers Alcohols and Phenols Amines
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_____ are the best sources of alpha-lipoic acid.

  1. Potatoes

  2. Lemons

  3. Radishes

  4. Bananas

  5. Beets

Show answer
Correct Option: A
Explanation:

 It is an antioxidant and hence, found in potatoes.

Which of the following compounds is/are used in moulded plastic?

  1. Malonyl urea

  2. Thio-urea

  3. Ionone

  4. Urea formaldehyde resin

  5. Both (1) and (2)

Show answer
Correct Option: D
Explanation:

This option is correct.

Primary alcohol is changed into an alkanal by the action of

  1. Sarett-collin's reagent

  2. Schweitzer reagent

  3. Milon reagent

  4. Hinsbergs reagent

  5. Tildon reagent

Show answer
Correct Option: A
Explanation:

This option is correct because the complex of chromic anhydride and pyridine is a very good oxidising agent for the conversion of primary alcohol into aldehydes.

Catechol is prepared by

  1. Duff reaction

  2. Kolbe reaction

  3. Riemer-Tiemann reaction

  4. Dakin reaction

  5. Cannizzaro reaction

Show answer
Correct Option: D
Explanation:

This option is correct because oxidation of salicylaldehyde with alkaline hydrogenperoxide forms catechol.

Benedict's solution is prepared by

  1. tri-butyl citrate

  2. ferric ammonium citrate

  3. sodium citrate

  4. potassium sodium tartrate

  5. succinic acid

Show answer
Correct Option: C
Explanation:

Sodium citrate is used in baby food to prevent the curdling of milk and is also used in the preparation of Benedict's solution.

The odour of benzyl butyrate belongs to

  1. jasmine

  2. apple

  3. pineapple

  4. orange

  5. wintergreen

Show answer
Correct Option: A
Explanation:

This option is correct.

Which of the following compounds does not undergo Friedel-Crafts reaction?

  1. Chlorobenzene

  2. Toluene

  3. Ethylbenzene

  4. Anisole

  5. Nitrobenzene

Show answer
Correct Option: E
Explanation:

This option is correct because nitrobenzene is formed by the nitration of benzene in the presence of conc. nitric acid and conc. sulphuric acid to form nitrobenzene. It does not react in the presence of anhydrous aluminium chloride. Hence, it does not undergo Friedel-Crafts reaction.

______ is obtained when mesitylenic acid is treated with soda lime.

  1. Toluene

  2. Methylcylohexane

  3. Benzoic acid

  4. Meta-xylene

  5. Benzaldehyde

Show answer
Correct Option: D
Explanation:

This option is correct.

Sour gasoline is purified by

  1. Bergius process

  2. Fischer-Tropsch process

  3. Etard process

  4. Doctor sweetening process

  5. Dow's process

Show answer
Correct Option: D
Explanation:

Sour gasoline is purified by the 'Doctor Sweetening' process.

When styrene is oxidised with H2O2 and KMnO4, ____ and ____ are formed.

  1. glycol, benzoic acid

  2. ethylbenzene, ethylcyclohexane

  3. benzalchloride, benzyl alcohol

  4. benzalchloride, benzotrichloride

  5. benzoic acid, phthalic acid

Show answer
Correct Option: A
Explanation:

This option is correct.

Malic acid is found in

  1. apples

  2. oranges

  3. mangoes

  4. blackberries

  5. papayas

Show answer
Correct Option: A
Explanation:

Malic acid is found in apples.

British gum is related to

  1. starch

  2. cellulose

  3. glycogen

  4. insulin

  5. Both (2) and (3)

Show answer
Correct Option: A
Explanation:

Starch solution heated at about 200oC produces a lower polysaccharide (dextrin) which is used as an adhesive under the name British gum.

The presence of nitro group in a benzene ring

  1. activates the ring towards electrophlic substitution

  2. renders the ring basic

  3. deactivates the ring towards nucliophilic substitution

  4. deactivates the ring towards electrophilic substitution

  5. Both (1) and (2)

Show answer
Correct Option: D
Explanation:

This option is correct.

Ethylene oxide is polymerised to form polyethylene glycol which is also known as

  1. natalite

  2. carbowax

  3. chlorex

  4. trioxane

  5. Both (3) and (4)

Show answer
Correct Option: B
Explanation:

This option is correct because when ethylene glycol is polymerised to form polyethylene glycol, it is known as carbowax.

Nickel formate is used in

  1. the formation of ghee

  2. manufacturing of artificial silk

  3. paints

  4. antiseptic

  5. smokeless powder

Show answer
Correct Option: A
Explanation:

This option is correct because nickel formate is used as a catalyst in the hydrogenation of oils to form ghee.

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