Question # 1

Which is the correct configuration of Fe3+ (Z= 26)?

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[Ar] 4s² , 3d⁶

[Ar] 4s² , 4d⁵

[Ar] 3d⁵

None of these

Brass is an alloy of

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Copper and tin

Copper and zinc

Aluminium and nickel

Leed and tin

The efficiency of a reversible heat engine depends only on the

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Temperature of the heat sink

Temperature of the heat source

Temperature of the heat source and sink

Pressure of the fluid

Which of the following statement is not correct regarding the constant R . and in ideal gas equation PV= nRT

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Its value in independent of temperature

Its value is independent of pressure

In SI Units its value is 8.314 K^-1 mol^-1

It is called the universal gas constant per molecule.

The device that convert the chemical energy of fuel directly into electrical energy is called.

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Galvanic cell

Electrolytic cell

Fuel cell

Concentration cell

Which of the following is not correct criteria for an idea solution.

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Enthalpyh of mixing = 0

Volume of mixing = 0

Free energy of mixing = 0

Obeys Reoult's law

The sum of pH and pOH is aqueous solution is equal to.

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14

7

zero

pKw

How much amount of NaOH is required to prepare 100 mL of 1 N solution.

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80 g

4 g

40 g

zero

Which of the following makes the motion of perpetual motion machine a physical impossibility.

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First law of thermodynamics

Second law of thermodynamics

Third law of thermodynamics

The Boltzmann law

For a chemical reaction A ___________ produce, the rat of the reaction doubles when the concentration of A is increased by 4 times the order of the reaction is.

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0

1

1/2

4

The number of vibrational degree of freedom for CO2 is

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2

3

4

5

The change in the concentration of the reactant of product per units time is called.

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Order of the reaction

Melecularity of the reaction

Rate of reaction

None of the above

The entropy change accompanying any physical or chemical transformation approaches zero as T approaches zero. This statement refers to.

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Helmholtz law

Third law of thermodynamics

Second law of thermodynamics

Nernat heat theorem

Which of the following is not an extensive property.

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Work

Entropy

Free energy

Volume

Which of the following is not a colligative property.

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Elevation of B.P.

Depresaion in F.P

Viscosity

Osmotic pressure

Which of the following process is not related with cannot cycle.

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Iso thermal expansion

Adiabatic expansion

Isothermal compression

Isobaric compression

Which of the following molecules has the lowest average speed at 273 K.

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CO2

CO

CH4

O2

When a strong beam of light is passed through a colloidal solution, the light will

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Be reflected

Be scattered

Pass unchanged

Be dispersed

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

Which of the following statement is not correct regarding galvanic cells.

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Oxidation occurs at the anode

Ions carry current inside the cell

Electrons flow around the external circuit. form cathode to anode

When the e.m.f. of the cell is positive cell reactionis spontaneous

The mole of photon is known as

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Quantum

Eienstein

Energy Packet

None of the above

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