A student takes 50gm wax (specific heat = 0.6 kcal/kg^oC) and heats it till it boils. The graph between temperature and time is as follows. Heat supplied to the wax per minute and boiling point are, respectively

Since specific heat $=0.6\mathrm{kcal}/\mathrm{gm}{\times }^{\circ }\mathrm{C}$

                                $=0.6\mathrm{cal}/\mathrm{gm}{\times }^{\circ }\mathrm{C}$

From graph it is clear that in a minute, the temperature is raised from $0^{\circ }\mathrm{C}\text{ to }{50}^{\circ }\mathrm{C}\text{. }$

$\Rightarrow$ Heat required for a minute $=50\times 0.6\times 50=1500\mathrm{cal}$
Also from graph, Boiling point of wax is 200^oC.