# Assertion(A): For the Balmer series of hydrogen spectrum, the value of n1 = 2 and n2 = 3, 4, 5. Reason(R): The value of n for a line in the Balmer series of hydrogen spectrum having the highest wavelength is 4 and 6.  1. Both A and R are true and R is the correct explanation of A. 2. Both A and R are true but R is not the correct explanation of A. 3. A is true and R is false. 4. A and R both are false.

Subtopic:  Hydrogen Spectra |
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Assertion(A): Absorption spectrum consists of some bright lines separated by dark spaces.
Reason(R): Emission spectrum consists of dark lines.

1. Both A and R are true and R is the correct explanation of A.
2. Both A and R are true but R is not the correct explanation of A.
3. A is true and R is false.
4. A and R both are false.
Subtopic:  Type of Spectra |
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Assertion(A): The number of spherical nodes in 3p orbital is one.
Reason(R): Number of spherical nodes = I, for orbital I =1.

1. Both A and R are true and R is the correct explanation of A.
2. Both A and R are true but R is not the correct explanation of A.
3. A is true and R is false.
4. A and R both are false.

Subtopic:  Nodal Plane |
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Assertion(A): $$h/\pi$$ is the angular momentum of the electron in the second orbit of He+.
Reason(R): Angular momentum of an electron in a subshell is given by $$\sqrt{l(l+1)} \times {h\over 2\pi}$$ .

1. Both A and R are true and R is the correct explanation of A.
2. Both A and R are true but R is not the correct explanation of A.
3. A is true and R is false.
4. A and R both are false.

Subtopic:  Bohr's Theory |
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Assertion(A): Hydrogen atom has only one electron in its orbit. But it produces several spectral lines.
Reason(R): There are many excited energy levels available.

1. Both A and R are true and R is the correct explanation of A.
2. Both A and R are true but R is not the correct explanation of A.
3. A is true and R is false.
4. A and R both are false.
Subtopic:  Hydrogen Spectra |
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Assertion(A): A spectral line will be seen for a 2px —► 2py transition.
Reason(R): Energy is released in the form of waves of light when the electron drops from 2px to 2py orbital.

1. Both A and R are true and R is the correct explanation of A.
2. Both A and R are true but R is not the correct explanation of A.
3. A is true and R is false.
4. A and R both are false.

Subtopic:  Hydrogen Spectra |
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Assertion(A): Electrons are ejected from a certain metal when either blue or violet light strikes the metal surface. However, only violet light causes electron ejection from a second metal.
Reason(R): The electrons in the first metal require less energy for ejection.

1. Both A and R are true and R is the correct explanation of A.
2. Both A and R are true but R is not the correct explanation of A.
3. A is true and R is false.
4. A and R both are false.

Subtopic:  Photo Electric Effect |
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Assertion(A): Helium and berylium having similar outer electronic configuration of type $$ns^2$$ .
Reason(R): Both are chemically inert.

1. Both A and R are true and R is the correct explanation of A.
2. Both A and R are true but R is not the correct explanation of A.
3. A is true and R is false.
4. A and R both are false.

Subtopic:  AUFBAU Principle |
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Assertion(A): The energy of an electron is largely determined by its principal quantum number.
Reason(R): Principal quantum number is a measure of the most possible distance of finding the electron around the nucleus.

1. Both A and R are true and R is the correct explanation of A.
2. Both A and R are true but R is not the correct explanation of A.
3. A is true and R is false.
4. A and R both are false.

Subtopic:  Quantum Numbers & Schrodinger Wave Equation |
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Assertion: The ground state configuration of Cr is 3d54s1.
Reason: A set of half-filled orbitals containing one electron each with their spin parallel provides extra stability.

1. Both statements are true and reason is the correct explanation of assertion.
2. Both statements are true but reason is not the correct explanation of assertion.
3. Assertion is true and reason is false.
4. Assertion is false and reason is true.

Subtopic:  De Broglie Equation |
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