Short Answer TypeNitrogen and chlorine have the same electronegativity but only former shows intermolecular hydrogen bonding. Discuss.
Both N and Cl have the same electronegativity (3.0). But the atomic size of nitrogen is much smaller than that of chlorine. Thus, nitrogen atom polarises the covalent bond N–H much more than done by Cl atom in H–Cl bond. As a result, the only nitrogen atom is able to exhibit intermolecular hydrogen bonding.
Long Answer TypeGive reasons for the following:
(i) The density of water is maximum at 277 K (4°C).
(ii) Why glycerol (glycerine) is more viscous than ethyl alcohol?
Short Answer TypeCalcualte the total pressure in a mixture of 8 g of dioxygen and 4 g of dihydrogen confined in a vessel of 1 dm3 at 
. R = 0.083 bar dm3 K-1 mol-1.
A mixture of dihydrogen and dioxygen at one bar pressure contains 20% by weight of dihydrogen. Calculate the partial pressure of dihydrogen.
Multiple Choice QuestionsIf average velocity of a sample of gas molecules at 300 K is 5 cm s-1, what is RMS velocity of same sample of gas molecules at the same temperature? (Given, α: u: v = 1:1.224: 1.127)
6.112 cm/s
4.605 cm/s
4.085 cm/s
5.430 cm/s
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