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Organic Chemistry

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Artificial camphor is called

  1. hexachloroethane

  2. chloretone

  3. chloropicrin

  4. chloral

  5. spent lye


Correct Option: A
Explanation:

This option is correct because chlorination of propane at 4000C and 74-100 atmospheric pressure forms hexachloroethane in solids. It called artificial comphor.

The mixture of RDX, TNT and aluminium powder is

  1. DBX

  2. Tropex

  3. Cordite(MD)

  4. Cordite

  5. (1) and (2) both are correct


Correct Option: B
Explanation:

This option is wrong because these are the secondary explosives. 50% more powerful than TNT by mass, torpex comprises of 42% RDX, 40% TNT, and 18% powdered aluminium.

In the candle industry, oil is hydrolysed with steam to produce

  1. spent lye

  2. antracene oil

  3. oil of mirbane

  4. sweet water

  5. (1) and (2) are correct


Correct Option: D
Explanation:

This option is correct because oil is hydrolysed with steam to remove fatty acids and mixed with paraffin wax to make candles. After removing fatty acids, mainly glycerol remains, which is called sweet water.

Benzendiazonium chloride is synthesised by the action of

  1. SnCl2/NaOH

  2. Zn dust

  3. Ni-Al alloy/NaOH

  4. CaO/heat

  5. Ni-H2/200oC


Correct Option: A
Explanation:

This option is correct because benzendiazonium chloride is reduced with SnCl2/NaOH to form benzene and removes nitrogen gas.

Tartar emetic is used as a

  1. mordant and in dyeing textiles

  2. food additive

  3. baking powder

  4. food beverage

  5. water softner


Correct Option: A
Explanation:

This option is correct because it is a white water soluble. The sweet and metallic testing poisonous powder or granules C4H4KO7Sb is used as mordant for dyeing textile and leather. It is also used in medicine as an expectront for inducing vomiting and for infection by schistosomes.

Cuminaldehyde is the essential oil of

  1. eucalpytus

  2. castor

  3. mustard

  4. neem

  5. soybean


Correct Option: A
Explanation:

This option is correct because cuminaldehydes is formed by the reduction of 4-isopropyl benzoyl chloride. It is the essential oil of eucalpytus.

Acetamide reacts with halogen and alkaline KOH to give

  1. methyl amine

  2. acetaldehydes

  3. acetic anhydride

  4. acetic acid

  5. dimethyl amine


Correct Option: A
Explanation:

This option is correct because acetamide reacts with Br2 and KOH to give methyl amine. This reaction is called hoffmann reaction.

Which of the following compounds measures the cetane number?

  1. Cyclopentadienyl manganese carbonyl

  2. n-hexadecane

  3. Tetraethyl lead

  4. Iso-octane

  5. (3) and (4) are correct


Correct Option: B
Explanation:

This option is correct because the cetane number is used for the measuring of the knocking character of the fuels in diesel engines and ignites very readily, hence this measures the cetane number.

When nitrobenzene is fused with KOH, it gives

  1. Ortho-nitrophenol and nitrosobezene

  2. Para-benzaquinone and nitrosobenzene

  3. Para-nitrophenol and para-benzaquinone

  4. Ortho-nitrophenol and para-nitrophenol

  5. (1) and (2) both


Correct Option: D
Explanation:

This option is correct because benzene is activated by the nitro group when it is mostly fused with KOH to form ortho-nitrophenol and para-nitrophenol.

Pyridoxine and thiamine belong to which of the following?

  1. Vitamins C and B6

  2. Vitamins B12 and C

  3. Vitamins B1 and B12

  4. Vitamins B6 and B12

  5. Vitamins B6 and B1


Correct Option: E
Explanation:

This option is correct because vitamins B6 and B1 are related to pyridoxine and thiamine.

Para-xylene is treated with oxidising agent potassium permanganate to give

  1. benzoic acid

  2. isophthalic acid

  3. terphthalic acid

  4. para-nitrobenzoic acid

  5. oxalic acid


Correct Option: C
Explanation:

This option is correct because para-xylene is treated with strong oxidising agent potassium permanganate to form terphthalic acid.

Benzene reacts with propene in the presence of AlCl3/H3PO4 to give

  1. catechol

  2. aspirin

  3. salol

  4. oil of winter green

  5. cumine


Correct Option: E
Explanation:

This option is correct because when benzene reacts with propene which is catalysed by the AlCl3/H3PO4, it gives cumine.

The pair of compounds salicyldehyde and catechol are synthesised by

  1. duff and tischenko reaction

  2. duff and refomastsky reaction

  3. cannizzaro and refomastsky reaction

  4. tischenko and cannizzaro reaction

  5. duff and dakin reaction


Correct Option: E
Explanation:

This option is correct because the duff reaction can also prepare salicylaldehyde by the heating of phenol with hexamethylenetetramine, glycerol and boric acid but an interesting reaction of salicylaldehyde is its oxidation with alkaline hydrogen peroxide to form catechol.

Which of the following is the chemical name of methyl orange?

  1. Para-animoazobenzene

  2. Para-hydroxoazobenzene

  3. Phenyl isothiocyanate

  4. Sodium-4-[(4-dimethylamino)phenylazo] benzene sulphonate

  5. N-phenyl benzene sulphonamide


Correct Option: D
Explanation:

This option is correct because diasotised sulphanilic acid undergoes coupling reaction with N-N dimethyl aniline to give methyl orange. The methyl orange acts as the acid based titration. The chemical name of methyl orange is sodium 4-[(4-dimethylamino)phenylazo]benzene sulphonate.

Acetaldehydes are polymerized in the presence of conc. sulphuric acid to form

  1. metaformaldehydes

  2. paraformaldehydes

  3. paraldehydes

  4. mysitylene

  5. crotonaldehyde


Correct Option: C
Explanation:

This option is correct because when the polymerization of acetaldeydes is done in the presence of conc. sulphuric acid, it forms paraldehydes. It gives a pleasant smelling liquid and this is used in medicine as a hypnotic.

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