The number of significant figures in $2.0400$ is

Fill in the blanks given below:
$(i)$ At ........ ${\,^\circ }{\text{C}}$,the values of temperature in both ${\,^\circ }{\text{C}}$ and ${\,^\circ }{\text{F}}$ are equal.
$(ii)$ The number of significant figures in $0.03$ is .....
$(iii)$ The closeness of various measurements for the same quantity is called .........
$(iv)$ The agreement of a particular value to the true value of the result is called ....

$1\,^{\circ}C$ rise in temperature is equal to a rise of

The units nanometer and picometer are related as,

The $SI$ unit of pressure is

The triple point of water is $................$ $K$. (in $.16$)