Question # 1

Monohalo derivatives of alkanes are called:

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two glucose molecules

alkyl halide

alkenes

imide

In an electrochemical series, elements are arranged on the basis of

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pH scale

pKa scale

pOH scale

Hydrogen scale

Lecithin is an example of:

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A simple lipid

Phospholipids

Waxes

Proteins

Ocean contains part earth's water:

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95%

96%

97%

98%

Which one the following gases is ideal at -200°C?

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N₂

He

both

none

The conversion of tertiary alcohols into alkenes in the presence of K2Cr2O7 + H2SO4 is

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Addition reaction

C-H bond cleavage

Elimination reaction

Combustion reaction

Polymerization process was classified in

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1926

1927

1929

1931

Which element differs from rest of elements of its group?

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Ba

Mg

Ca

Be

Under which condition CO has the maximum molar volume

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high T and P

Low T and High p

high T and low P

Low T and low P

Ozone is usually produced in the

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South polar region

North pole region

Tropical region

Thermosphere zone

The heat of reaction depends upon

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Temperature of the reactants

Physical states of the reactants and the products

Both A) and B)

Path of the reaction and the temperature

Formula of chloroform is

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CH₃CI

CCI₄

CH₂CI₂

CHCI₃

Red P can be obtained form white P by

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Heating it with a catalyst in an inert atmosphere

Distilling it in an inert atmosphere

Dissolving it in CS₂and crysllizing

Melting it ad pouring the liquid into water

When electrons revolve in stationary orbits

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There is no change in energy level

They vecome stationary

They are gaining kinetic energy

There is increase in energy

Size of an anion is increased as compared to its atom because of the

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Addition of new shell

Repulsion of electrons in the valence shell

Decrease in nuclear charge

Increase in the unclear charge

Etherification is catalyzed by

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Acids

Gases

Salts

None of the these

Which of the following species has unpaired electrons in ant-bonding molecular orbitals?

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O2⁺²

N2^-2

B₂

F₂

Major fertilizers with micro-nutrients are:

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Nitrogeneous

Phosphalic

Potash

All of these

Outer shells of two elements X and Y have two and six electrons respectively. If they combine, the expected formula of compound will be

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XY

X₂Y

X₂Y₃

XY₂

Ethyl acetate reacts with CH₃MgBr to form

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Secondary alcohol

Tertiary alcohol

Primary alcohol and acid

Acid

A molecule of haemoglobin is made up if nearly

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10,000 atoms

50,000 atoms

2500 atoms

1500 atoms

The rate of a chemical reaction is directly;y proportional to product of molar concentration of reaction substance it is called :

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Low of conservation of energy.

Law of mass action.

Rate law .

Active mass rule.

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