Question # 1

Which of the following was discovered first:

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Charge to mass ratio of electrons

Mass of electron

Charge of electron

All of above at same time

The set of quantum numbers which represents the highest energy of an electrons

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n = 3, l = 1, m = 1, s = +1/2

n = 3, l = 2, m = 1 , s = +1/2

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

n = 4, l = 3, m = +1, s = 0

If volume of a system is kept constant and heat is supplied to the system then

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Internal energy of the system increases and no work is done on the surrounding

Internal energy of the system increases and work is done on the surrounding

No change in internal energy occurs

No work is done on the surrounding

The law of lavoisier and Laplace illustrates

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The principle of conservation of energy.

Equivalence of mechanical and thermal energy

The principle of conservation of matter

Equivalent of mechanical and chemical energy

The most important factor in determining chemical behaviour of atom

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Nuclear structure

Electronic configuration

Atomic mass

Solubility

Balmer series lie in:

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Radio-wave region

Visible region

Ultraviolent region

Infrared region

Which one of the following orbitals has high energy?

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4d

3s

4s

2s

total number of d-electrons in an atom of atomic number 26 is:

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7

4

6

5

The amount of heat evolved or absorbed in a chemical reaction when represented in a chemical equation is called:

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entropy of a reaction

free energy of reaction

heat of reaction

none of above

Hess's law deals with

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Changes in heat or reaction

Rate of reaction

Equilibrium constant

Influence of pressure on volume of a gas.

Paschen, Pfund and Brackett series are found in

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uv region

visible region

ir region

none of these

The quantum number which describe the orientation of the orbitals is

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spin quantum number

principle quantum number

azimathal quantum number

magnetic quantum number

The ratio of e/m values of a proton and anα- partical is

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2 : 1

1 : 1

1 : 2

1 : 4

Which of the following quantum number has negative quantum number value

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Principle

Magnetic

Azimuthal

Both b & c

When 50 cm³ of 0.2 n H2SO is mixed with 50 cm³ of 1 N KOH,the heat liberated is

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11.46 kJ

57.3 kJ

573 kJ

573 J

If value of Azimuthal quantum number is '1' the atomic orbital is:

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f

s

p

d

In standard states, enthalpies of all element are:

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always +ve

unity

always -ve

zero

P-fund, Bracket and paschen series lie in:

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Infrared region

Ultra violent region

Visible region

Microwave region

Which of the following has largest ionization energy

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F

O

Na

Mg

Which of the following series lines in the atomic emmision spectrum of hydrogen is in the visible region:

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Paschen

Bracket series

Balmer series

Lyman series

Colour of fluorescence produced in discharge tube depends upon

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Gas present in discharge tube

Composition of glass

Nature of electrodes

Nature of particles

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