Which of the following are correct ?...

Which of the following are correct ?

All s-orbitals have the same orbital angular momentum

The angular momentum of the electron in `4^(th)` orbit is `2h//pi`

The magnetic moment of `Cu^(2+)` ion = 1.732 B.M.

All d-orbitals have two nodal planes.

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The correct Answer is:

A, B, C

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A ball falls towards the earth. Which of the following is correct ?

if the system contains ball, the momentum is conserved

if the system contains earth, the momentum is conserved

if the system contains the ball and the earth, the momentum is conserved

if the system contains the ball and the earth and the sun, the momentum is conserved

if the system contains ball, the momentum is conserved

if the system contains earth, the momentum is conserved

if the system contains the ball and the earth, the momentum is conserved

if the system contains the ball and the earth and the sun, the momentum is conserved

`CH_3 C -= "CCH"_3 gt CH_3CH_2C -= CH` (dipole moment)