Question # 1

Which is a good nucleophile as well as a good leaving group?

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F-

Cl-

Br-

I-

In the body carbohydrates are broken down into:

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glucose

fatty acids

amino acids

nucleic acid

Correct order for the reactivity ofalkyl halide in S, reactions

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R-I>R-F>R-CI

R-F>R-CI>R-I

R-I>R-CI>R-F

R-CI>R-I>R-F

Starch is a polymer is of:

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sucrose

fructose

α-D-Glucose

lactose

Lipids are naturally occurring compounds produced in cell and are water insoluble but soluble in organic solvents. One of the followings is not a lipid. Select among the following

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Nucleic acid

A triglyceride

Sterol

Vitamin D

Which if the following will have the same number of molecules at S.T.P?

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280cm³ of CO₂ and 280cm³ of N₂O

11.2dm³ of O₂and 32g of O₂

44g of CO₂and 11.2dm³ of CO

28g of N₂and 5.6dm³ of oxygen

An example of ion-dipole force is the solution of:

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bromine inbenzene

ethanol is water

NaCl in water

glucose in water

The mechanism of polymerization involves free addition Polymerization or condensation polymerization, Choose the correct statement:

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Polyester is an addition polymer

polythene is an addition polymer

polyviny chloride (PVC) is a condensation polymer

Polystyrene

Which gas is not a constituent of atmosphere?

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Xe

O₃

H₂

F₂

Water soluble and cyrstalline carbohydrrates are:

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monosacharides

obiligoseacharides

polysacharides

a and b

Unit of the rate constant depends upon the

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Molecularity of reaction

Order of reaction

Concentration terms

Number of reactants

The process in which orbitals of different energies and shapes mix up with each other to give equivalent is called,

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Hybridization

Polymerization

Isomerisation

Carbonization

Nitrogen in the atmosphere is:

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78%

21%

0.9%

0.03%

The divisibility of atom was shown by

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Stoney

J.J. Thomson

Millikan

Rutherford

When two hydrogen atoms approach each other.

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Forces of attraction operate.

Forces of repulsion operate.

Forces of attraction and repulsion operate simultaneously.

Nothing happens.

The oxidation number of each element of group ll-A is

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0

+1

+2

-1

The rate of reaction :

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Remain same as reaction proceeds.

May decrease or increase as reaction proceeds .

Increase as reaction proceeds.

Decreases as reaction proceeds.

In the rate equation when the concentration of reactants are unity, then rate is equal to

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Instantaneous rate

Average rate

Active mass of products

Specific rate constant

Hydroxyl amine is a derivative of::

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Alcohol

Aldehyde

Ammonia

Ketone

Which of the following reagent will react with both aldehyde and ketones?

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Grinard's reagent

Tollen's reagent

Fehling's reagent

Benedict's reagent

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-110.7 KJ/mole

+110.7 KH mole^-1

676.7 KJ mole^-1

+393.7 KH mole^-1

Photochemical smog is caused by

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CO

CO₂

O₃

NO₂

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