Which of the following gases will have least volume if 10 g of each gas is taken at same temperature and pressure?

The volume of a gas at a given temperature and pressure is determined by the number of moles of the gas, according to Avogadro's law. This law states that equal volumes of all gases, at the same temperature and pressure, have the same number of molecules (or moles).

To determine which gas will have the least volume, we need to find out which gas has the least number of moles. The number of moles of a substance is calculated by dividing the mass of the substance by its molar mass.

The molar mass of a gas can be found on the periodic table and is typically given in grams per mole (g/mol).

Without knowing the specific gases in question, we cannot definitively answer which gas will have the least volume. However, the gas with the highest molar mass will have the least number of moles for a given mass, and therefore, according to Avogadro's law, will occupy the least volume under the same conditions of temperature and pressure.