# If three gases X, Y and Z are arranged in increasing order of their relative molecular mass and the mass of each gas is 10 g at S.T.P, which gas will contain the least number of molecule and which the most? (a) X least and Y maximum (b) X maximum and Z least (c) Y maximum and Z least (d) Y least and Z maximum

## Question ID - 103691 :- If three gases X, Y and Z are arranged in increasing order of their relative molecular mass and the mass of each gas is 10 g at S.T.P, which gas will contain the least number of molecule and which the most? (a) X least and Y maximum (b) X maximum and Z least (c) Y maximum and Z least (d) Y least and Z maximum

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Answer Key : (b) -

X maximum and Z least

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 Statement 1: The zeroth law of thermodynamics was known before I law of thermodynamics. Statement 2: The zeroth law concerning thermal equilibrium was appeared after three laws (I, II and III) of thermodynamics and thus, was named as zeroth law. a) Statement 1 is True, Statement 2 is True; Statement 2 is correct explanation for Statement 1 b) Statement 1 is True, Statement 2 is True; Statement 2 is not correct explanation for Statement 1 c) Statement 1 is True, Statement 2 is False d) Statement 1 is False, Statement 2 is True

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