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Q. No.Which one of the following electrons in the ground state will have least amount of energy?
1. An electron in hydrogen atom.
2. An electron in 2p orbital of carbon atom.
3. The electron of copper atom present in 4s orbital.
4. The outermost electron in sodium atom.
1. An electron in hydrogen atom.
2. An electron in 2p orbital of carbon atom.
3. The electron of copper atom present in 4s orbital.
4. The outermost electron in sodium atom.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA monochromatic infrared range finder of power 1mW emits photons with wavelength 1000 nm in 0.1 second. The number of photons emitted in 0.1 second is-
(Given -h = \(6.626 \times 10^{-34} J~s\) , \(c = 3 \times 10^8 m~s^{-1}, \) Avogadro number = \(6.022 \times 10^{23}\))
1. \(30 \times 10^{37}\)
2. \(5 \times 10^{14} \)
3. \(30 \times 10^{34} \)
4. \(5 \times 10^{11} \)
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology| List-I (quantum number) |
List-II (Orbital) |
| (a) n = 2, \(\ell\) = 1 | (i) 2s |
| (b) n = 3, \(\ell\) = 2 | (ii) 3s |
| (c) n = 3, \(\ell\) = 0 | (iii) 2p |
| (d) n = 2, \(\ell\) = 0 | (iv) 3d |
| (a) | (b) | (c) | (d) | |
| 1 | (iii) | (iv) | (i) | (ii) |
| 2 | (iv) | (iii) | (i) | (ii) |
| 3 | (iv) | (iii) | (ii) | (i) |
| 4 | (iii) | (iv) | (ii) | (i) |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology(h = 6.626 × 10–34 Js, c = 3 × 108 ms–1, NA = 6.022 × 1023 mol–1)
1. 2.31 × 106 J mol–1
2. 3.84 × 104 J mol–1
3. 3.84 × 10–19 J mol–1
4. 2.31 × 105 J mol–1
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology1. 158.7 Å
2. 158.7 pm
3. 15.87 pm
4. 1.587 pm
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA 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, ]
1. 2192 m
2. 21.92 cm
3. 219.3 m
4. 219.2 m
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe 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
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe number of protons, neutrons and electrons in , respectively, are:
1. 104, 71 and 71
2. 71, 71 and 104
3. 175, 104 and 71
4. 71, 104 and 71
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIn hydrogen atom, what is the de Broglie wavelength of an electron in the second Bohr orbit is: [Given that Bohr radius, ]
(1) 211.6 pm
(2) 211.6 pm
(3) pm
(4) 105.8 pm
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyOrbital having 3 angular node and 3 total nodes is:
1. 5 p
2. 3 d
3. 4 f
4. 6 d
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