Question # 1

A compound z' decolorizes bromine water and produces white ppt. The compound 'z'is

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Alkane

Alcohol

Phenol

Benzene

Chemicals used to kill insects are:

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Herbicides

Insecticides

Pesticides

Fungicides

Commonly used coagulants are ions of:

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Ferrous

Al

Cr

Ferric

What is the numerical value of 'R; (the gas constant) in S.I units?

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83143 J/mole/K

Avogadro's law

83.143 J/mole/K

8.3143 J/mole/K

A polymer of polyvinyl chloride with DP 1000 has molecular or molar mass:

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630

6300

63000

630000

An electron with drawing group attached to e-position in phenol

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makes it basic

Stabilises the phenoxide ion

decreases its basicity

allows it to precipitate in aqueous solution

SHE acts as anode when connected with Cu electrode but act as cathode with Zn electrode

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Zn has less reduction potential than hydrogen and Cu

Zn has high reductionl potential than hydrogen

and Cu

Zn is below electrochemical series than hydrogen and Cu

Zn has least tendency to lose electron

Protein of high biological value

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Contains essential amino acids

Is poor in essential amino acids

Is of plant source

Contains amino acid glycine e. Is a basic protein

The average kinetic energy of an ideal gas per molecule is SI units at 25°C will be

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6.17 x 10^-21 KJ

6.17 x 10^-21 J

6.17 x 10^-20 J

7.16 x 10^-20 J

The structural isomerism arises due to the difference in the

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Number of atoms in the molecule

Arrangements of atoms in the molecule

Number as well as arrangement of atoms in the molecule

Spatial arrangement of atoms

Natural water is

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Pure

Impure

Acts as solute

Distilled

In Lucas test teriary alcohol make an oily layer

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Immediately

In 10 mins

On heating

Not

The unit of rate constant k is the same as that of the rate of reaction in

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First order reaction

Second order reaction

Third order reaction

Zero order reaction

The functional group isomer of dimethylether is

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Ethyl alcohol

Propyl alcohol

Diethyl ether

Butyl alcohol

Molecules of High molecular weight usually greater than 10,000 are called:

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Macro molecules

Mega molecules

Poly molecules

Gega molecules

The bond angle between hydrogen atoms and carbon in alkane is

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104.5°

107.5°

109.5°

120.5°

With the reference of w/m ratio of anode rays, the e/m ratio of cathode rays s:

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Greater.

same.

Smaller.

Not fixed.

Replacement of hydrogen atom by - SO₃H group in benzene is called

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Nitration

Alkylation

Sulphonation

Acylation

Which of the following is not the reactions of lithium

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Heating a mixture of sodium benzoate and soda lime gives

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Methane

Benzene

Sodium bezoate

Calcium benzoate

Glacial acetic acid freezes to ice like solid it.

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07

17

27

37

Angle 120° is observed in molecules :

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CH₄

CH_3-CH₃

CH -CH

CH_{2 =}CH₂

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