Question # 1

The mass of one mole of electrons is

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1.008 mg

0.55 mg

0.184 mg

1.673 mg

Bond energy depends upon

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Electronegativity

Size of atom

Bond length

All of these

Splitting of spectral lines when atoms are subjected to strong electric field is called

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Zeeman effect

Stark effect

Photoelectric effect

Compton effect

Which statement about a molecule is incorrect.

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It exist independently

Molecules of a substances are similar

Hemoglobin is a homoatomic molecules

Oxygen molecule is a macromolecule

Which electron traveled more distance, when jump from

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n1 to n2

n2 ato n3

n3 to n2

n3 to n4

Which of the following value of heat of formation indicates that the product is least stable.

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-94 KJ

-231.6 KJ

+21.4 KJ

+70 KJ

In endothermic reactions, the heat content of the.

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Products is more than that of reactants.

Reactants is more than that of products

Both a and b

Reactants and products are equal

Which of the following will have highest rate of diffusion

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O2

CO2

NH3

SO2

An atomic orbital has l =1 , m =+1, 0, -1, n = 3 than which one of the following atomic orbital has such values.

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2s

2p

3p

3d

One of the following statements about Born-Haber cycle is correct. Which is that statement

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Born-Haber cycle is different from Hess's law

The energy change in a cyclic process is not zero

The lattice energy of the crystalline substances can be calculated easily

Heat of formation of the product and the lattice energy of the substance can be calculated simultaneously

The value of pH and P^oHof pure water at 25° C is

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14

7

1 x 10^-14

1 x 10¹⁴

Observed pressure is less than ideal pressure for any gas due to

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Intermolecular forces

Size of molecules

Boiling point of molecules

Both a and c

A real gas obeying Van der Waal's equation will resemble ideal gas if.

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Both a and b are large

Both a and b are small or zero

A is small and b is large

A is large and b is small

Which pair of molecule have Debye forces in them

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Ar and Ar

Argon and water

Na+ ions and water

water and water

Unit of mole fraction is

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mol dm-3

mol kg-1

g dm-3

No unit

Which of the following represents electronic configuration of the most electropositive elements

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He [ 2s^-1]

Xe [6s¹]

He [2s²]

Xe [6s²]

Chromatography involves the distribution of a solute between.

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Two stationary phases

Two mobile phases

A stationary phase and a mobile phase

Two stationary and two mobile phase.

Drying agent used in crystallization is.

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P2O3

Animal charcoal

KMnO4

Water

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