Question # 1

Nylon, 6,6 is a condensation polymer of

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Adipic acid and glycol

Phthalic acid and glycol

Adipic acid and hexaethylene diamine

Pthalic acid and hexaethylene diamine

Which one of the following step is not involved in determination of empirical formula

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Determination % of each element

Determination of gram atom of each element

Determination of isotopes of each element

Determination of atomic ratio of element

Theα-carbon of 19 out of 20α-amino acids found in protein is chiral or asymmetric. Hence they are optically active. Only one of the 20α-amino acids is not optically active which one is the

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Proline

Glycine

Hitidine

Alanine

The substances which are added to the soil to provide one or more nutrient elements essential for plant growth are called

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Minerals

Hormones

Fertilizers

None of these

The pH of the rain water in areas where acid rain is the cause of pollution may be

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6.5

5.6

4.5

2.2

The wave number of the light emitted by a certain source is 2 x 10⁶m^-1. The wavelength of this light will be

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500 nm

500 m

200 nm

5 x 10⁷m

The oxidation state of Fe in [Fe(CN)₆]^3-is

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+2

+3

+4

-3

The structure of complex hydrides is

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Tetrahedal

Trigonal

Octahedral

Square planar

Which of the following is the hardest metal among following

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Li

Na

Rb

K

Ca, Mg, Be, Ba, belong to the same group, the order of their ionization energy values is

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Be > Mg> Ca > Ba

Ba > Ca > Mg > Be

Ca > Mg > Be > Ba

Ba > Mg > Ca > Be

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Rate is independent of concentration of water since it is in excess

Rate is independent of concentration of ester since it is in exces

Rate depends upon the concentration of acid catalyst added

Rate = k[CH₃COOC₂H₅]^1/2[H₂O]^1/2

General formula of alkyl halide is:

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R----X

R----OH

R------COH

R------COOH

Which compound does not show hydrogen bonding with water

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CH₃OH

C₂H₅OH

CH₃- O - CH₃

C₆H₅OH

Aryl halides are less reactive towards nucleophilic substitution reactions as compared to alkyl halides due to

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The formation of less stable carbonium ion

Resonance stabilization

Larger carbon-halogen bond

The inductive effect

A macroscopic property of a system which describes the initial and final state of the system is called

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Physical property

Chemical property

Energy property

State function

A compound used as eye wash:

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Borax

Boric acid

Metabolic acid

Pyroboric acid

The ore CaSO₄2H₂O has the general name

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Gypsum

Dolomite

Calcite

Epsom salt

How many monochlorobutanes will be possible on chlorination of n-butane?

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1

2

3

5

Which of the following is produced when an aqueous solution of butan-2-ol is refluxed with dil acidified KMnO₄

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Butanol

Butanoic acid

Butanone

Butane

The bond angle H - O - H in ice ins closest to

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120° , 28^'

60°

90°

109°

Which of the following molecules has zero dipole moment?

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NH₃

CHCl₃

H₂O

BF₃

Naphthalene, iodine and NH_{4 can :}

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Sublime.

Both (a) and (c).

Crystallize.

None of above.

The general formula of amino acids is

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There are 20 amino acids found in protein which is not the property of these amino acids

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They are allα-amino acids

They are all optically active

They have high decomposition point

They are water soluble

Units of molarity are

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gm/lit

mol/lit

kg/lit

None of these

Which of the following is not the reactions of lithium

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Both E₁and E₂mechanism can be shown by

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1° - RX

2° - RX

3° - RX

None of these

The solubility of a gas in water depends upon

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Nature of the gas

Temperature

Pressure of the gas

All of the above

The substance which is present in large quantity is called a :

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Solute

Solvent

solutiion

None of Above

Ethyl acetate is obtained when methyl magnesium iodide reacts with

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Ethyl formate

Ethyl choroformate

Acetyl chloride

carbondioxide

The filtration process is used to separate solid from:

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Liquid

Gas

Solid

All of above

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