Statement-1: The mineral corudum, Al_(2)O_(3) is colourless when pure. However, when various M^(3+) transition metal ion are present in trace amounts, various coloured gemstones metal ion. Statement-2: The colours are produced due to electronic transitions within d-orbitals (called d-d transitions) of a transition metal ion.

Statement-1: The mineral corudum, Al_(2)O_(3) is colourless when pure.

1.	Statement-1: The mineral corudum, Al_(2)O_(3) is colourless when pure. However, when various M^(3+) transition metal ion are present in trace amounts, various coloured gemstones metal ion. Statement-2: The colours are produced due to electronic transitions within d-orbitals (called d-d transitions) of a transition metal ion.
Answer» Statement-1 is TRUE, Statement-2 is True , Statement-2 is a CORRECT EXPLANATION for Statement-1. Statement-1 is True, Statement-2 is True, Statement-2 is NOT a correct explanation for Statement-1. Statement-1 is True, Statement-2 is FALSE. Statement-1 is False, Statement-2 is True. Answer :A