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Organic Chemistry

Description: Engineering entrance
Number of Questions: 15
Created by:
Tags: Engineering entrance Derivatives of Carboxylic Acids Preparation of Carboxylic Acids Petroleum and Petrochemicals Alkanes Alcohols and Phenols Aromatic Hydrocarbons Alkanes and Cycloalkanes Carbohydrates
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Syrengic acid is found in

  1. wine

  2. plant cell wall

  3. mustard seeds

  4. catechu plants

  5. both (3) and (4) are correct

Show answer
Correct Option: A
Explanation:

This option is correct because syrengic acid is mostly found in wine. It is made up of grapes. Syrengic acid is released by the breakdown of the compound of malvidin, which is also found in red wine.

Indol-1 is popular for

  1. beta-blocker

  2. beta blocker and calcium channel blocker

  3. pH indicator

  4. calcium indicator

  5. both (1) and (2)

Show answer
Correct Option: D
Explanation:

This option is correct because indol-1 is a popular calcium indicator similar to fura-2. In contrast to fura-2, indol-1 has a dual emission peak in Ca free solution in 475 nm while in the presence of Ca, the emission is shifted to 400 nm.

Pyrolysis oil is known as

  1. bio oil

  2. bio diesel

  3. heating oil

  4. alternative fossil fuel

  5. both (3) and (4)

Show answer
Correct Option: A
Explanation:

This option is correct because pyrolysis oil is also known as bio crude or boi oil. It is extracted by bio mass to liquid technology of destructive distillation from dried bio mass in the reactor at the temperature of about 500oC. It contains a high amount of hydrocarbon.

The coupling of lithium dialkyl copper and alkyl halides to form an alkane is called

  1. Williamson synthesis

  2. Corey-House synthesis

  3. Frankland reaction

  4. Reformatsky reaction

  5. Duff reaction

Show answer
Correct Option: B
Explanation:

This option is correct.

When phenol is distilled with zinc dust, which of the following compounds is formed?

  1. Benzene

  2. Anisole

  3. Aniline

  4. Toluene

  5. Chlorobenzene

Show answer
Correct Option: A
Explanation:

This option is correct because when phenol is distilled with zinc dust or its vapour is passed through zinc granule at 400oC, it gives benzene.

Asphalt is also known as

  1. bitumen

  2. paraffin oil

  3. vegetable oil

  4. pyrolysis oil

  5. algae fuels

Show answer
Correct Option: A
Explanation:

This option is correct because asphalt is also known as bitumen. It is a sticky, black and highly viscous liquid.

Which of the following reactions prepares pivalic acid?

  1. Koch reaction

  2. Duff reaction

  3. Dakin reaction

  4. Kolbe reaction

  5. Riemer-Tiemann reaction

Show answer
Correct Option: A
Explanation:

This option is correct. Hydrocarboxylation of isobutene in the presence of an acid gives pivalic acid.

Which one of the following is correct about Dow process?

  1. Oxidation of toluene to benzoic acid

  2. Reduction of nitrite with bisulphite towards hydroxylamine

  3. Sodium hypochlorite is mixed with three fold excess ammonia at 5oC to give monochloramine

  4. Oxidation of toluene takes place in the presence of air to give phenol

  5. Both (2) and (3) are correct

Show answer
Correct Option: D
Explanation:

This option is correct because oxidation of toluene in the presence of air gives phenol. This process is called the Dow process.

Which of the following forms when glycerol reacts with phathalic anhydride?

  1. Bakelite

  2. Paraformaldehydes

  3. Trioxane

  4. Glyptal

  5. Carbowax

Show answer
Correct Option: D
Explanation:

This option is correct because glycerol is condensed with phathalic anhydride to form a polyester known as glyptal. It gives thermoseting polymer for making synthetic fiber.

Deficiency of thiamine causes

  1. prenicious aneamia

  2. scurvy

  3. beriberi

  4. aneamia

  5. cheilosis

Show answer
Correct Option: C
Explanation:

This option is correct because vitamin B1 is called thiamine. It is found in pulses and nuts. Due to the deficiency of thiamine, beriberi occurs. Retarded growth, lost appetite and weight loss are the features of beriberi.

Pyruvic acid is reduced in the presence of Na-Hg/H2O to form

  1. lactic acid

  2. crotonic acid

  3. tartronic acid

  4. citric acid

  5. aconitic acid

Show answer
Correct Option: A
Explanation:

This option is correct because pyruvic acid is treated with Na-Hg/H2O to form lactic acid. It is found in curd, which is beneficial for human beings.

Meerwein-Ponndrof reduction is found in which of the following?

  1. Aldehydes or ketones are reduced in presence of amalgamate zinc/hydrochloric acid to form alkane.

  2. Aldehydes or ketones are reduced in presence of aluminium isopropoxide to form alcohol.

  3. Aldehydes or ketones are reduced in the presence of hydrazine to alkane.

  4. Cynide reduced in presence of stannous chloride with hydrochloric acid followed by hydrolysis yield aldehydes.

  5. Both (3) and (4) are correct

Show answer
Correct Option: B
Explanation:

This option is correct because when aldehydes or ketones are reduced with reagent aluminium isopropoxide it gives alcohol.

Which one of the following enzymes does not form glucose?

  1. Lactase

  2. Invertase

  3. Matlase

  4. Amaylase

  5. Both (1) and (2) correct

Show answer
Correct Option: D
Explanation:

This option is correct because starch is catalysed by amalyase to form maltose.

Valeronitrile is polymerised by

  1. metal

  2. peroxide and epoxide

  3. acid

  4. aqueous acid and base

  5. both (2) and (3)

Show answer
Correct Option: A
Explanation:

This option is correct because when nitrile or valeronitrile react with metal or metal compounds, they get easily polymerised with metal.

Which of the following statements is incorrect about bioten?

  1. Bioten is helpful in maintaining steady blood sugar.

  2. Boiten is water insoluble.

  3. Boiten creates metabolism disorder.

  4. Bioten are found in cosmetics as well as in hair and skin.

  5. Bioten is cofactor responsible for carbon dioxide transfer in several carboxylase enzyme.

Show answer
Correct Option: B
Explanation:

This option is correct because bioten is called vitamin H, which is completely soluble in water.

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