Question # 1

Methyl mercaptan, CH₃SH, is one of the substances responsible for bad breath and is often used to impart a smell to natural gas in a pipeline.
What will be formed when CH₃SH is burned in an excess of air?

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CO CO₂ H₂S

CO H₂O SO₃

CO₂ H₂O SO₂

CO₂ H₂O SO₃

The hetero atom in py ridine is

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Oxygen

Nitrogen

Chlorine

Sulphur

During the electrolysis of Fused NaCI, the products are

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Na and H2

Na and Cl2

Na and O2

H2 and Cl2

Oxidation of secondary alcohol produces

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Aldehyde

Ketone

Alkyl halide

Ester

If the four tubes of a car are filled to the same pressure with N₂, O₂, H₂ and helium separately,then which one will be filled first.

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N₂

O₂

H₂

He

Albumin is

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Insoluble in water

Heat coagulable protein

A plant protein

A protein of low biological value

The diffusion of gasses at absolute zero will be:

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Slightly decrease

unchanged

Slightly increased

Zero

A solid has a sharp melting point slightly above room temperature and is a poor thermal and electrical conductor, its crystal classification by bond type is

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Ionic

Metallic

Molecular

Covalent

The rate of diffusion of a gas is inversely proportional to:

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Density of a gas

Velocity of the gas

Viscosity of the gas

All of above

Amino acid α-hydroxy carboxylic acid and

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CO₂ gas

H₂ gas

N₂ gas

NH₃ gas

If V₁= 5 litres, P₁= 2 atm, T₁= T₂= 273°C and V₂= in liter

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5

80

125

10

Which one of the following solution will have higher vapour pressure than that of water

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Aqueous solution of methanol

Aqueous solution of HCI

Aqueous solution of glucose

Aqueous solution of urea

Which of the following molecules has unpaired electrons in anti-bonding molecular orbitals?

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O₂

N₂

Br₂

F₂

Sodium metal is obtained by the electrolysis of fused NaCl in cell is called

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Nelson's cell

Down's cell

Daniell cell

Voltaic cell

The total number of d-bock transition element is

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10

14

40

30

Which of the following is lighter

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Li

k

Na

Ca

Ionization potential increases in moving from left to right in a period

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Because nuclear charge increase

Because atomic size decrease

Both (a) and (b)

Because atomic size increases

When formaldehyde is added to Grignard reagent we get

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Aldehyde

Acetone

Primary alcohol

Secondary alcohol

The filtration process is used to to separate solid from :

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Liquid.

Gas.

Solid.

All of above.

Metal used in the preparation of Grignard's reagent is:

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Ca

Na

Mg

Zn

Which statement is incorrect about standard hydrogen electrode

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Its oxidation and reduction potential is zero

It consists of Pt wire dipped on 1 molar HCI solution

The electrolyte is 1 molar NaOH solution

H₂gas is passes in it at 1 atmospheric pressure

The branch of chemistry which deals with thermal energy changes in chemical reactions is called

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Chemical kinetic

Thermodynamics

Thermochemistry

Mechanics

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