Question # 1

Schrodinger Wave equation describes electron completely because

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it describes a set of four quantum number

it describes the particle nature of electron

it measures wavelength of electron

it describes electron moving in specific orbit

Which of the following has largest ionization energy

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F

O

Na

Mg

Which of the followings is not charged particle

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proton

electron

neutron

hydrogen nucleus

An electron moving in orbit having principle quantum number 4 & azimuthal quantum 2, then subshell will be

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4p

4d

4f

5s

Point out the orbitals which are degenerate in a multi electron atom

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1s, 2s orbitals

2d orbitals

3s, 3p, 3d orbitals

3d orbitals

The arrangement of subshells in the ascending order of their energy on complete filling of 4f subshell the entering electron goes to

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5s

5p

5d

5f

When rate of forward reaction is equal to the backward reaction then

the equilibrium is established called:

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static equilibrium

chemical equilibrium

dynamic equilibrium

none of above

e/m of cathode rays is same but for positive rays e/m changes by changing gas in the discharge tube because

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cathode rays are small sized particles

cathode rays have same charge

nature of cathode rays same for all gasses. but masses of nuclei are different for different gases

temperature of cathode rays higher

Why is the second ionization energy of the higher than the first ionization energy?

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the size of the ion decreases after removal of an electron

the effective nuclear charge increases

the distance of the valence electron from the nucleus decreases

all of the above

Anode is the surface on which probability of finding electron is:

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50%

Less then 10%

More then 95%

Zero

An element with electronic configuration 1s²,2s²,2p⁶,3s²is

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metal

non-metal

inert gas

a liquid

The nature of positive rays depends upon

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The nature of electrode

The nature of discharge tube

The nature of residual gas

All of the above

The heat required to raise the temperature of a body by 1 K is called

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Specific heat

Thermal capacity

Water equivalent

None of these

If an endothermic reaction is allowed to take place very rapidly in the air the temperature of the surrounding air:

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remains constant

increases

decreases

remains unchanged

The degenerate orbitals p-sub shell are

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2

3

5

7

The e/m value for positive rays is maximum:

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Oxygen

Nitrogen

Helium

Hydrogen

In a cation the number of protons is more than the number of

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electron

photons

positrons

neutrons

Enthalpy represents:

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reaction rate

heat content

activation energy

energy state

The charge over mass ratio of electron is:

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1.6 x 10^-1C Kg^-1

9.1 x 10^-31C

1.7588 x 10¹⁰C Kg

6.62 x 10^-34C Kg^-1

Choose the S.i unit for molar heat capacity among the following:

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joule deg^-1 mol^-1

joule deg^-1 kg^-1

joule cm^-3 deg^-1

joule deg^-1 atom^h

The nature of positive rays depend on:

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The nature of electrode.

The nature of discharge tube.

The nature of residual gas.

All of above.

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