Question # 1

According to R, S system the correct order of priority of the following groups is .

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-CH2OH > - CHO > ----- COOH

-COOH > ------CHO > ------CH2OH

---- CH2OH -----> - COOH > -------CHO

--- COOH > - CH2OH >----- CHO

The light absorbed in UV and visible region causes.

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Vibrational energy changes

Rotational energy changes

Electronic excitation

All of these

The steroid which plays an important role in carbohydrate metabolism is.

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Oestrone

Progestrrone.

Androsterone

Cortisone

The process of transfer of genetic message from DNA to m-RNA is known as

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Refplication

Translation

Transcription

Transference

Which of the following pairs does not represent Lowery acid base pair.

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H2O+NH3

H2O +H2O

HCL + H2O

CH3NH2 + BF3

Sugar and common salt in a mixture can be separated through then process of.

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Sublimation

Distillation

Ion exchange

Crystallization from solution in ethanol

Select an acidic amino acid

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Lysine

Cystine

Aspartic acid

Aminoacetic acid

Which of the following is most acidic.

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Phenol

p-nitrophenol

o-Nitrophenol

m-Nitrophenol

For a compound to act as a dye it must have

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A suitable colour

Ability to fix to fibre

Both A and B

None of these

Which of the following hydrocarbon cannot be obtained on reacting chloomethane with sodium metal in the presence of dry ether.

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C4 H10

C2H6

C2H4

C3H8

Which of the following reagent cannot be used to detect the phenolic group.

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Neutral FeCl3

I2/NaOH

NaOH solution

Br2/H2O

Indigotin is a dye obtained from indigo plant which belongs to the group of.

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Substantive dyes

Mordant dyes

Vat dyes

Disperse dyes

A catalyst

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Actually participates in the reaction

Changes the equilibrium concentration of the products

Does not affect a reaction energy path

Always decreases the rate for a reaction

The IUPAC name of HOCCH2CH2CH2COOH is

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4- formylbutanoic acid

5- formylpentanoic acid

4- carboxybutanal

5- carboxypentanal

The deficiency of which vitamin leads to beri brainteaser

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Thiamine

Riboflavin

Pyridoxine

Asorbic acid

Monomer of neoprene rubber to

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1-chloro 1,3- butadiene

2- chlro, 1,3-butadiene

2-Bromo -1,3- butadiene

2-Methyl 1,3-butadiene

The compound (CH3)3COH according to IUPAC is known as.

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Tert Butanol

2,2 -Dumethyl -Propanol

2- Methyl -2-propanol

Tert Alcohol

Hydrocarbon X (C6H12) on oxidation with hot alkaline (KMnO4) gives a mixture of prop ionic acid and dimethyl ketone. The structure of compound X is

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CH3CH = CHCH2CH2CH3

(CH3)2 C = CH CH2 CH3

CH3CH2CH = CHCH2CH3

(CH3)2 C = C (CH3)2

If reaction A has an activation energy of 250 kj and reaction activation energy of 100 kj, which of the following statements must be correct.

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If reaction A is exothermic and reaction B is endothermic then reaction A is favored kinetically

At the same temperature the rate of reaction B is greater than the rate of reaction A

The energy of reaction A must be greater than the energy of reaction B.

The energy of reaction B must be greater than the energy of reaction A

Combination of a -amino acid through which linkages results result in formation of protein

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Ester linkage

Glycosidic linkage

Lactum linkage

Peptide linkage

The product obtained on heating n-heptane with Cr2O3 ____Al2O3 at 600 ^oC is.

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Cycloheptane

Methyl cyclohexane

Benzene

Teluene

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