Question # 1

The compound insoluble in acetic acid is.

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Calcium oxide

Calcium carbonate

Calcium oxalate

Calcium hydroxide

Used in filling luminous tubes.

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Xenon

Krypton

Radon

Helium

Which of the following sets of quantum number is possible.

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n = 4, l = 3, m = -3 ,s = 0

n = 4, l = 0, m = 0, s =+1/2

n = 4, l = 4, m = -4, s = -1/2

None of these

The tensile strength of a carbon nanotube is __________ times that of steel.

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10

25

100

1000

Ethylene belongs to.

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C_2v group

D_2h group

C₂ group

D_ah group

Which of the following statements in not correct with respect to the important characteristics of aromatic compounds.

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They are usually cyclic compounds

They are resistant to usual addition reactions

They usually undergo substitution reactions

They are less stable

Which of the following biogeochemical cycle is not component of ecosystem.

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Carbon cycle

Potassium cycle

Oxygen cycle

Nitrogen cycle

Chief source of water and soil pollution in

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Mining of ores

Thermal power plant

Agro industry

All the above

Which of the following is not an extensive property.

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Work

Entropy

Free energy

Volume

In which of the following species the bonds are non directional.

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NCl3

RbCl

BeCl2

BCl3

The maximum number of electron is an atom with l = 2 and n = 3 is

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2

6

10

12

Concentration polarization arises because of the

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Different concentrations of solutions in the two half cells

Changes in the concentration of electrolyte around the electrode from bulk concentration

Reversible nature of the cell

Variation in temperature during measurements

The number of degrees of freedom and number of components for a system of containing undissolved salt , in equilibrium with water vapor are.

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2,2

3 , 2

1 , 1

1 , 2

The name hydrogen was proposed by.

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Lavoisier

Rutherford

Henry Cavandish

Scheele

The matrix is usually in the form of.

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Sand

Limestone

Rocks

All

Which statement is false.

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If a reaction is thermodynamically spontaneous it may occur rapidly

If a reaction is thermodynamically spontaneous it may occur slowly.

Activation energy is a kinetic quantity rather than a thermodynamic quantity.

If a reaction is thermodynamics spontaneous, it must have a low activation energy.

Which of the following statement is incorrect.

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An alloy is a mixture of two or more metals

An alloy is a mixture of two or more metal and non metal elements that have metallic properties

An alloy has a fixed composition

An amalgam is an alloy containing Hg

How many varieties of commercial iron are known.

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1

2

4

3

For a given mass of a gas if temperature increase

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Pressure and volume remain Constance

Volume increases provided pressure is kept constant

Pressure decreases provided volume is constant

Both volume and pressure decrease

The magnetic quantum number (m) specifies the individual orbital in a Sub shell for a given l, m can be.

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l,l- l........-1

l........2, l -3.......-2l

l-l-2,..........-l

l-2,l-4, ............-4l

Which of the microscope techniques is similar to the Atomic Force Microscopy (AFM)

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Scanning Electron Microscopy

Scanning Tunneling Microscopy

Transmission Electron Microscopy

None of the above

The value of an Einstein

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Is independent of wavelength

Decrease with increase in wavelength

Increase with increase in wavelength

Depends on the temperature of the absorbing system

The particles of about 1 nm need _______ activation energy to enter either aggregation processes or reactions to give to new chemicals.

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Higher

Lesser

N o

All above

Which of the following is not a colligative property.

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Elevation of B.P.

Depresaion in F.P

Viscosity

Osmotic pressure

The correct order of second ionization potential of carbon nitrogen, oxygen and fluorine is.

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C > N > O > F

O > F > N > C

O > N > F > C

F > O > N > C

The kinetics of the decomposition of ammonia on the tungsten surface follows

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Zero order

First order

Second order

Third order

The fertilizers which provide single nutrient from NPK are called _______ fertilizer

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Straight

compound

Both A and b

None of above

Of the following the commonly used n the laboratory desiccator is.

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Anhyd. Na2Co3

Anhyd Ca Cl2

Dry NaCl

None of the above

All steroids on heating wish solenium give

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phenanthrene

Cholesterol

Diels hydrocarbon

Isoprene

Which of the following acid radical give organic layer test.

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Cl-

CO3

I

S^2-

Molecular weight of proteins may be determined by

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Osmotic pressure measurements

Sedimentation methods

Light scattering methods

All of these

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