Question 11 : Alpha-particles are fast moving
1. Hydrogen atoms
2. Electrons
3. Helium nuclei
4. Protons
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Question 12 : If a beam of sunlight is passing through the prism, then the type of spectrum obtained is?
1. Continuous spectrum
2. Line absorption spectrum
3. Line emission spectrum
4. Band spectrum
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Question 13 : The value of Redberg's constant (RH) is?
1. 1.09678 cm^-1
2. 109678 cm^-1
3. 109678 cm
4. 1.09678 cm
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Question 14 : Electronegativity of fluorine is arbitrarily fixed as?
1. 2
2. 3
3. 4
4. 5
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Question 15 : Lyman series of spectral lines appear in the ____ portion of spectrum.
1. Ultraviolet
2. Infra red
3. Visible
4. All of above
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Question 16 : The energy required to remove electron from an atom in gaseous state is called?
1. Electronegativity
2. Electron affinity
3. Ionization energy
4. Electropositivity
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Question 17 : The power of an atom to attract a shared pair of electron is called?
1. Electron affinity
2. Electronegativity
3. Ionization potential
4. Electropositivity
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Question 18 : The energy released when an electron is added to an atom is the gaseous state is called?
1. Electron affinity
2. Ionization potential
3. Electronegativity
4. Electropositivity
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Question 19 : P–Orbitals are ________ in shape?
1. Spherical
2. Dumb bell
3. Diagonal
4. Linear
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Question 20 : The value of plank's constant is?
1. 6.626 X 10³⁴ Js
2. 6.024 X 10²³ Js
3. 6.626 X 10³⁴ Js
4. 1.667 X 10²⁸ Js
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