The orbital angular momentum of a p-electron is given as:
1.
2.
3.
4.
A 0.66 kg ball is moving with a speed of 100 m/s. The associated wavelength will be:
1.
2.
3.
4.
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
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
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.
2.
3.
4.
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
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
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
If uncertainty in position and momentum are equal, then the uncertainty in velocity is:
1.
2.
3.
4.