Which of the following is an example of an ideal black body?

About black body radiation, which one of the following is a $WRONG$ statement?

In which process is the rate of transfer of heat maximum?

The rate of emission of a body doubles when its temperature is increased by $10^{\circ}C$. If the temperature of the body is increased from $10^{\circ}C$ to $100^{\circ}C$,the rate of emission increases by a factor of:

The Sun emits radiation in all directions. The Earth receives approximately $1.4 \ kW/m^2$ of radiation per second. The distance between the Sun and the Earth is $1.5 \times 10^{11} \ m$. How much mass does the Sun lose per day? $(1 \ \text{day} = 86400 \ s)$

When a body has the same temperature as that of its surroundings,which of the following statements is true?