$Al_4C_3$ is an ionic carbide,named as

An extremely hot copper wire reacts with steam to give:

'Bordeaux mixture' is used as a fungicide. It is a mixture of

Calcium cyanamide on treatment with steam produces:

$A$ white solid '$A$' on heating produces a gas that turns lime water milky,and the remaining solid residue is yellow when hot but turns white on cooling. The solid '$A$' is:

Which of the following mixtures is known as fusion mixture?