Exercise

Calculate the heat energy required to convert $5 \mathrm{g}$ of ice at $-15°\mathrm{C}$ to steam at $100°\mathrm{C}$.

$10°\mathrm{C}$ is the same temperature as.

The value of $\mathrm{d}$ in $\mathrm{cm}$ (shown in the figure), as estimated from Graham's law, is

Choose the correct statement from the following:

In which one of the following sets is each one a solid under ordinary conditions?

The energy needed for sending electron from 1st Bohr orbit (n = 1) to the second orbit (n = 2) of a hydrogen atom is

Identify the ${\mathrm{Mg}}^{2+}$ ion from the figures given below where, $\mathrm{n}$ and $\mathrm{p}$ represent the number of neutrons and protons respectively

Which of the following atoms are isobars?