MCQ
Number of angular nodes for 4d orbital is _________ .
- ✓2
- B1
- C3
- D4
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

The number of following statements which is/are correct about phenolphthalein is $.....$.
$A$. It can be used as an indicator for the titration of weak acid with weak base.
$B$. It begins to change colour at $pH =8.4$
$C$. It is a weak organic base
$D$. It is colourless in acidic medium