Question # 1

Codon for amino acid glycinc is not represented by base pair

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GCA

GGC

GGA

GGU

Casionic polymerization is initiated by

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BF3

NaNH2

Bul

Both b and c

Compounds consisting of two or more interlocked rings are called.

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Inclusion compounds

Cage compounds

Catenanes

Crown other

1-Butyne on oxymereuration -demercuration would give.

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Butanone

Butanal

Propanol and methanol

Propanoic acid and formic acid

Citral when heated with KHSO4 forms.

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Isoprene

p-cymene

p-menthane

Dipentene

Which of the following is not a characteristic of phthalocyanine dyes.

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They are metal complex

the are insoluble in water

They have porphin nucleus

They are used in photographic plates

Which statement is false.

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If a reaction is thermodynamically spontaneous it may occur rapidly

If a reaction is thermodynamically spontaneous it may occur slowly.

Activation energy is a kinetic quantity rather than a thermodynamic quantity.

If a reaction is thermodynamics spontaneous, it must have a low activation energy.

Which type of polymers the Vulcanised rubbers is.

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Linear

Cross jinked

Branch chain

Any one of these

To complete transfer of a shared pir of electrons to one of the atoms joined by a double or triple bond at the requirement of an attacking reagent is known as.

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Inductive effect

Resonance effect

Eletromeric effect

Stark effect

SAN is a polymer of

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Styrene

Acrylonitrile

Both A and B

Vinyl chloride

Which of the following equations represent linear free energy relationship.

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Hammett equation

Taft equation

Helmholtz equation

Differential equation

The molar mass of an organic acids is determined by

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Depression of freezing point

Elevation of boiling point

Volumetric method

Victor Myer's method

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

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Oestrone

Progestrrone.

Androsterone

Cortisone

In order to give strength and elasticity natural rubber is heated with.

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Sulphur

Oxygen

Nitrogen

Chlorine

In which of the following group, each member given a positive iodoform test.

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Methanol, ethanol, propanone

Ethanol, isopropyl alcohol, methanol

Ethanol, ethanal, isopropyl alcohol

Propanal 2-propanol, propanone

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

Process of separating the racemic mixture into optically active isomers is known as.

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Resolution

Racemisation

Walden inversion

Epimerization

Which of the following statement is not correct with respect to electrometric effect.

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It is permanent effect

It is brought into play instantaneously at the demand of attacking reagent

It proceeds a polar addition reaction

The original electronic condition is restored after the removal of tacking regent.

Cyclic polymers of ethylene glycol formed by condensation are called.

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Crown ether

Brown ether

Cryptates

Both A and C

The decrease in electron density at one position accompanied by a corresponding increase at other position is called.

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Inductive effect

Asymmetric effect

Electromeric effect

Resonance effect

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

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