A 0.66 kg ball is moving with a speed of 100 m/s. The associated wavelength will be:

(h=6.6×10-34 Js)

1. 6.6×10-34m

2. 1.0×10-35 m

3. 1.0×10-32m

4. 6.6×10-32 m

Subtopic:  De Broglie Equation |
 80%
From NCERT
AIPMT - 2010
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The orbital angular momentum of a p-electron is given as:

1.  3 h2π

2.   32hπ

3. 6 h2π

4.  h2π

Subtopic:  Quantum Numbers & Schrodinger Wave Equation |
 66%
AIPMT - 2012
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According to the Bohr Theory, which of the following transitions in the hydrogen atom will give rise to the least energetic photon?
1. n = 5 to n = 3
2. n = 6 to n = 1
3. n = 5 to n = 4
4. n = 6 to n = 5

Subtopic:  Hydrogen Spectra |
 66%
From NCERT
AIPMT - 2011
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According to the law of photochemical equivalence, the energy absorbed (in ergs/mole) is given as:
(h = 6.62 × 10–27 ergs, c = 3 × 1010 cm s–1, NA = 6.02 × 1023 mol–1)

1. \({{1.196\times 10^{8}}\over{\lambda}}\)
2. \({{2.859\times 10^{5}}\over{\lambda}}\)
3. \({{2.859\times 10^{16}}\over{\lambda}}\)
4. \({{1.196\times 10^{16}}\over{\lambda}}\)
Subtopic:  Electromagnetic Radiation |
 63%
From NCERT
NEET - 2013
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Hints
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The orientation of an atomic orbital is governed by:

1. azimuthal quantum number

2. spin quantum number

3. magnetic quantum number

4. principal quantum number

Subtopic:  Quantum Numbers & Schrodinger Wave Equation |
 62%
From NCERT
AIPMT - 2006
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If the mass of electron is 9.11×10-31 kg  and the planck's constant is 6.626 ×10-34 Js, then the uncertainty involved in the measurement of velocity within a distance of 0.1 Å is:

1. 5.79×106 ms-1

2. 5.79×107 ms-1

3. 5.79×108 ms-1

4. 5.79×105 ms-1

Subtopic:  Heisenberg Uncertainty Principle |
 52%
From NCERT
AIPMT - 2006
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An element X has the following isotopic composition: 
200X: 90% 
199X: 8.0% 
202X: 2.0% 
The weighted average atomic mass of the naturally-occurring element X is closest to:

1. 200 amu
2. 201 amu
3. 202 amu
4. 199 amu

Subtopic:  Number of Electron, Proton & Neutron |
 67%
From NCERT
AIPMT - 2007
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Consider the following sets of quantum numbers: 
 
Which of the following sets of quantum numbers is not possible?

1. ii, iii, and iv
2. i, ii, iii, and iv
3. ii, iv and v
4. i and iii

Subtopic:  Quantum Numbers & Schrodinger Wave Equation |
 86%
From NCERT
AIPMT - 2007
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The measurement of the electron position is associated with
uncertainty in momentum,
which is equal to 1 x 10-18 g cm s-1.
The uncertainty in electron velocity will be
(mass of an electron is 9 x 10-28 g)-
 

1. 2 x 109 cm s-1
2. 1 x 109 cm s-1
3. 1 x 105 cms-1
4. 1 x 1011 cm s-1

Subtopic:  Heisenberg Uncertainty Principle |
 70%
From NCERT
AIPMT - 2008
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If uncertainty in position and momentum are equal, then the uncertainty in velocity is:

1. 12mhπ

2. h2π

3. 1mhπ

4. hπ

Subtopic:  Heisenberg Uncertainty Principle |
 80%
From NCERT
AIPMT - 2008
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