Hydrogen bonding and intermolecular forces

25 questions on Hydrogen bonding and intermolecular forces from the Chemical Bonding chapter: 6 NEET level, 9 JEE Main, 10 JEE Advanced. Each one opens with its answer and solution.

• Which of the following hydrides shows hydrogen bonding in the liquid state? NEET level
• Ice is less dense than liquid water at 0 degC because NEET level
• Which hydride of Group 16 has the highest boiling point? NEET level
• Intramolecular hydrogen bonding is present in NEET level
• Only London dispersion forces act between the molecules of NEET level
• Ethanol (b.p. 78 degC) boils much higher than dimethyl ether (b.p. -24 degC) although both are C2H6O. This is due to NEET level
• Which of the following is steam volatile? JEE Main level
• The molar mass of ethanoic acid found by the freezing-point depression method in benzene is about 120 g mol^-1, twice its formula mass. This is because ethanoic... JEE Main level
• The correct order of increasing strength of hydrogen bonds is JEE Main level
• Assertion (A): The boiling point of H2O (373 K) is much higher than that of HF (293 K). Reason (R): A water molecule can form up to four hydrogen bonds (two as ... JEE Main level
• Which of the following liquids is expected to have the highest viscosity at room temperature? JEE Main level
• n-Pentane boils at 36 degC but its isomer neopentane boils at 9.5 degC. The reason is that JEE Main level
• The potential energy of London dispersion interaction between two neutral molecules separated by distance r varies as JEE Main level
• Which of the following compounds show intramolecular hydrogen bonding? JEE Main level
• Which of the following exhibit intermolecular hydrogen bonding in the pure liquid state? JEE Main level
• In hexagonal ice, every water molecule is hydrogen bonded to four neighbours. The average number of distinct hydrogen bonds per water molecule (each bond counte... JEE Advanced level
• 3.00 g of ethanoic acid (molar mass 60 g mol^-1) is dissolved in 100 g of benzene (K_f=5.12 K kg mol^-1). Assuming that the acid is completely dimerised through... JEE Advanced level
• Which comparison of o-nitrophenol and p-nitrophenol is correct? JEE Advanced level
• All four compounds have molar mass 44-46 g mol^-1. The correct order of boiling points is JEE Advanced level
• The boiling points of Group 16 hydrides are H2O 373 K, H2S 213 K, H2Se 232 K and H2Te 271 K. Which statement correctly accounts for this trend? JEE Advanced level
• The salt KHF2 is stable but KHCl2 is not known under ordinary conditions. This is because JEE Advanced level
• The boiling points of the hydrogen halides are HF 293 K, HCl 188 K, HBr 207 K and HI 237 K, although the dipole moment decreases from HCl to HI. The best explan... JEE Advanced level
• Which of the following statements are correct? JEE Advanced level
• Which of the following pure liquids contain molecules that can accept a hydrogen bond but have no X-H bond (X = N, O, F) to donate one, so they do not hydrogen ... JEE Advanced level
• Which of the following statements about hydrogen bonding are correct? JEE Advanced level