A metal catalyst (X) is used in the catalytic converter of automobiles. This prevents the release of gas Y into the atmosphere. What are X and Y respectively?
If uncertainty in position and momentum of an electron are equal, then uncertainty in its velocity is:
The graph shown below represents the variation of probability density, \( \Psi(r) \), with distance \( r \) of the electron from the nucleus. This represents:

Match the following elements with their correct classifications:
