Answer :
Name: Boyle's Law
Variables: pressure and volume
Constants: moles of gas and temperature
Equation: PV = k
Name: Charles’s law
Variables: Volume and temperature
Constants: moles of gas and pressure
Equation: V = kT
Name: Gay-Lussac's Law
Variables: Temperature, pressure
Constants: moles of gas and volume
Equation: P = kT
Name: Combined gas law
Variables: Pressure, temperature, volume
Constants: Gas constant and moles of gas
Equation: PV=kT
Explanation :
Boyle's Law : It is defined as the pressure of the gas is inversely proportional to the volume of the gas at constant temperature and number of moles.
Charles' Law : It is defined as the volume of the gas is directly proportional to the temperature of the gas at constant pressure and number of moles.
Gay-Lussac's Law : It is defined as the pressure of the gas is directly proportional to the temperature of the gas at constant volume and number of moles.
Combined gas law is the combination of Boyle's law, Charles's law and Gay-Lussac's law.