........ of a reaction cannot be determined experimentally.

Which of the following molecules has the maximum dipole moment?

If $p \rightarrow (q \vee r)$ is false,then the truth values of $p, q, r$ are respectively

Dispersive power depends on the following:

If $a = \hat{i} + \hat{j} + t \hat{k}$ and $b = \hat{i} + 2 \hat{j} + 3 \hat{k}$,then the values of $t$ for which $(a+b)$ and $(a-b)$ are perpendicular are: