$Cl^{-}$ is the conjugate base of

Arrange the anions $(p) \text{CH}_3^{-}, (q) \text{NH}_2^{-}, (r) \text{OH}^{-}, (s) \text{F}^{-}$ in decreasing order of their basic strength.

Acidity of $BF_3$ can be explained on which of the following concepts?

Which of the following acids would have a $STRONGER \ CONJUGATE \ BASE$?
$(A)$ $H_2S$ $(1)$ vs $H_2O$ $(2)$
$(B)$ Glutarimide $(3)$ vs Piperidin$-2-$one $(4)$
$(C)$ $CH_3C \equiv CH$ $(5)$ vs $CH_3CH = CH_2$ $(6)$

What are diprotic and triprotic acids? Explain with differentiation.

Which of the following species acts as a base,according to the Bronsted-Lowry theory?
$HCl + NH_3 \rightleftharpoons NH_4^+{_{\text{(aq)}}} + Cl^-{_{\text{(aq)}}}$