MHT CET Chemistry Question (2026) — Solution

Step-by-step solution

Let the mass of Ne be w_1 and the mass of CH _4 be w_2. Molar mass of Ne = 20 g/mol Molar mass of CH _4 = 16 g/mol Number of moles of Ne, n_ Ne = w_1 20 Number of moles of CH _4, n_ CH _4 = w_2 16 According to Dalton's law of partial pressures, the partial pressure of a gas in a mixture is directly proportional to its number of moles. Since the partial pressures of both gases are equal, their number of moles must be equal. n_ Ne = n_ CH _4 w_1 20 = w_2 16 w_1 w_2 = 20 16 = 5 4 The required ratio by mass is 5:4. Answer: 5:4