Smoke is an example of

$A$ transverse wave is travelling along a stretched string from right to left. The figure shown represents the shape of the string at a given instant. At this instant,

Celestite is a mineral of which of the following?

The isothermal Bulk modulus of an ideal gas at pressure $P$ is

In the following reaction,$X$ and $Y$ are respectively:
$CH_3COOH + NH_3$ $\longrightarrow X \stackrel{\Delta}{}$ ${\longrightarrow} Y + H_2O$

Kerosene is a mixture of $.........$.