The reaction of white phosphorus with aqueous $NaOH$ gives phosphine along with another phosphorus-containing compound. The reaction is known as:

When $Cl_2$ gas is passed through a hot and concentrated solution of $KOH$,which of the following compounds is formed?

Which of the following reactions are disproportionation reactions?
$(A)$ $2 Cu^{+} \rightarrow Cu^{2+} + Cu$
$(B)$ $3 MnO_4^{2-} + 4 H^{+} \rightarrow 2 MnO_4^{-} + MnO_2 + 2 H_2 O$
$(C)$ $2 KMnO_4 \rightarrow K_2 MnO_4 + MnO_2 + O_2$
$(D)$ $2 MnO_4^{-} + 3 Mn^{2+} + 2 H_2 O \rightarrow 5 MnO_2 + 4 H^{+}$
Choose the correct answer from the options given below:

At room temperature,disproportionation of an aqueous solution of in situ generated nitrous acid $(HNO_2)$ gives the species

In the following reaction $P_4 + 3NaOH + 3H_2O \to PH_3 + 3NaH_2PO_2$,what happens to phosphorus?

Which of the following processes is not associated with steel making?