Question # 1

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

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H2O+NH3

H2O +H2O

HCL + H2O

CH3NH2 + BF3

The common host compound for the formation of inclusion compound is.

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Urea

Thiourea

Cholic acid

All above

RNA is involved int eh synthesis of

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Protein

Nucleic acid

Carbohydrates

Fats

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.

The addition of Br2 to cis 2-butene produces.

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(+) 2,3 - dibromobutane only

(-) 2,3 -dibromobutane only

(+) 2,3, dibromobutane

meso-2,3, -dibromobutane

The greater stability of bonzyl carbonium ion as compared to t-butyl carbonium ion is due to.

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Inductive effect

Resonance effect

Electrometric effect

All above

Which of the following molecules can oxhibit geometrical isomerism.

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CH3CH = CH2

CH3CH = CHCH3

(CH3)2 C = CH2

CH3CH = C(CH3)2

In the Friedel-Craft acylation, the amount of AlCl3 tha tmust be taken is

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In catalytic amount

One equivalent

More then one equivalent

Amount does not matter

Which of the following is a planar molecule.

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Acetone

Formic acid

Acetic acid

All above

Which of the following linear polymer.

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Polypeptide

Protein

Starch

Phenol formaldehyde resin

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

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Sulphur

Oxygen

Nitrogen

Chlorine

The decomposition of dimethyl ether at 504 oC is first order with a half -life of 1570 second. What fraction of an initial amount of dimethyl ether remain after 47-10 seconds.

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1/3

1/6

1/8

1/16

Which of the following is capable of forming zwitter ion.

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Amino acids

Halo acids

Hydroxy acids

All of these

1-Butyne on oxymereuration -demercuration would give.

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Butanone

Butanal

Propanol and methanol

Propanoic acid and formic acid

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

Select the major product obtained from the addition of HBr to I -Methyl cyclohexene

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1-bromo -2- methyl cyclohexane

6- bromo-i- methyl cyclohex -i- ene

3- bromo -1- methyl cyclohex - 1- ene

I-bromo -I- methyl cyclohexane

Which of the following groups exert -1 effect.

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- NO2

- CN

-COOH

<C = 0

Which type of polymers the Vulcanised rubbers is.

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Linear

Cross jinked

Branch chain

Any one of these

Which of the following statement in not correct with respect to inductive effect.

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Bond length decrease with increase in inductive effect.

Inductive effect generates polar character in bonds

Variation in strength of aliphatic acids can be explained

It alone cna explain the basically of triphenylamine

Glycine reacts with nitrous acid to form

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Methyl amino

Acetic acid

Zwitter ion

Glycollic acid

The dye which is a constituent of Skiffs reagent used for detection formaldehyde group is.

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Gentain violet

Megneta

Phenolphthalein

Rosolic acid

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