Question # 1

When 5d orbital is completed them entering electron goes into.

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6s

6p

6d

6f

Which particle have greater wave nature.

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Electron

Proton

Neutron

a particles

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]

Node is a surface on which probability of finding electron is

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Zero

More than 95%

50%

Infinite

Positive rays were discovered by.

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J.J.Thomson

Goldstein

Ruther ford

William Crookes

When 6d orbital is complete, the entering electron goes into.

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7f

7s

7p

7d

If uncertainty position of an electron is zero, the uncertainty in its momentum would be

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Zero

Infinite

Both a and b

None of these

X- rays have same nature as

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Alpha rays

Beta rays

Gamma rays

Cathods rays

The nature of positive rays depends on

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The nature of electrode

The nature of discharge tube

The nature of residual gas

All of the above

When atoms are subjected to strong electric field, splitting of spectral lines is called.

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Zeeman effect

stark effect

Photoelectric effect

Compton effect

Transition from various energy levels to the lowest energy level gives.

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Lyman series

Balmer series

Panchen sereis

Pfund series

If uncertainty in position of electron is zero, the uncertainty in its momentum would be.

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zero

Less than zero

Infinite

One

Which formula will be used to determine the number of in electrons sub shell of an atoms.

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2(l+1)

2(2l+1)

(l+1)

(2l+1)

Energy and wavelength of a photon are related as.

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Direct

In direct

No correlation

Inverse under root

The charge on electron was determined by millikan in his oil drop experiment and its value is

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6.023 x 10^-23C

1.602 x 10^-23C

1.602 x 10^-19C

6.625 x 10^-34C

De Broglie equation treats electron to be.

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A particle

Wave

Both particle and wave

None of these

Which one of the following relationship is correct about energy and frequency.

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E = hv

E = h/v

E = v/h

h = v/E

the nature of the positive rays depend on

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The nature of the electrrode

The nature of the discharge tube

The nature of the residual gas

All of the above

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