Identify and correct the mistake in each of the following: i) The molar volume of gas at STP is 22.4 cm3. ii) 2 x R.M.M. = V.D. iii) An atom cannot exist independently. iv) The ratio of atoms in a molecule may be integral or simple or may not be fixed. v) H2O is a homo atomic molecule.
Answers
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The molar volume of a gas expresses the volume occupied by 1 mole of the gas under certain conditions of temperature and pressure.
Only a few elements called noble gasses (such as helium, neon, argon, krypton, etc.) are chemically unreactive and exist in or independently of the free state.
Atoms of most elements are chemically highly reactive and do not exist either independently or in the free state.
The correct statements are as follows
The Molar Volume of gas at STP is 22.4 liters.
2 ×vapour density=Relative molecular mass.
An atom may or may not exist independently.
The ratio of atoms in a molecule may be fixed and integral but may not be simple.
H2O is a hetero atomic molecule.