A particular station of All India Radio, New Delhi, broadcasts on a frequency of 1,368 kHz (kilohertz). The wavelength of the electromagnetic radiation emitted by the transmitter is : [speed of light, c=3.0×108 ms-1]

1. 2192 m

2. 21.92 cm

3. 219.3 m

4. 219.2 m

Subtopic:  Electromagnetic Radiation |
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The number of protons, neutrons and electrons in Lu71175, respectively, are:

1.  104, 71 and 71

2.  71, 71 and 104

3.  175, 104 and 71

4.  71, 104 and 71 

Subtopic:  Introduction of Atomic Structure | Number of Electron, Proton & Neutron |
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The number of angular nodes and radial nodes in 3s orbital are

1. 0 and 2, respectively

2. 1 and 0, respectively

3. 3 and 0, respectively

4. 0 and 1, respectively

Subtopic:  Nodal Plane |
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4d, 5p, 5f and 6p orbitals are arranged in the order of decreasing energy. The correct option is:

1.  5f>6p>4d>5p

2.  5f>6p>5p>4d

3.  6p>5f>5p>4d

4.  6p>5f>4d>5p

Subtopic:  AUFBAU Principle |
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Which of the following series of transitions in the spectrum of hydrogen atom falls in visible region?

1.  Brackett series

2.  Lyman series

3.  Balmer series

4.  Paschen series

Subtopic:  Hydrogen Spectra |
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Orbital having 3 angular node and 3 total nodes is:
1. 5 p
2. 3 d
3. 4 f
4. 6 d

Subtopic:  Nodal Plane |
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The incorrect statement among the following is

1. Total orbital angular momentum of an electron in 's' orbital is equal to zero.

2. An orbital is designated by three quantum numbers, while an electron in an atom is designated by four quantum numbers.

3. The electronic configuration of N atom is 
       

4. The value of m for dz2 is zero.

Subtopic:  AUFBAU Principle |
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The element Z = 114 has been discovered recently. 
It will belong to which of the following family/group and electronic configuration.
1. Carbon familyRn5 f14 6d107s27p2
2. Oxygen familyRn5 f14 6d107s27p4
3. Nitrogen familyRn5 f14 6d107s27p6
4. Halogen familyRn5 f14 6d107s27p5

Subtopic:  AUFBAU Principle |
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Which of the following statements is wrong?

1. The uncertainty principle is x·ph4π

2. Half-filled and fully filled orbitals have greater stability due to greater exchange energy,

greater symmetry, and a more balanced arrangement.

3. The energy of the 2s orbital is less than the energy of the 2p orbital in the case of hydrogen-like atoms.

4. De-Broglie's wavelength is given by λ=hmv, where m= mass of the particle, v = group velocity of the particle.

Subtopic:  De Broglie Equation |
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How many electrons can fit in the subshell for which n = 3 and l = 1?
1.  2
2.  6
3.  10
4.  14

Subtopic:  AUFBAU Principle |
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