Exams › JEE Advanced › Chemistry

Which of the following properties has a LOWER value for D2O compared to H2O?

1. Density (g/mL) at 20 deg C
2. Boiling point
3. Dielectric constant at 20 deg C
4. Latent heat of vaporisation at 20 deg C

Correct answer: Dielectric constant at 20 deg C

Solution

Although D2O has stronger intermolecular hydrogen bonds, its dielectric constant is marginally lower than H2O at 20 deg C (~78.25 vs ~80.1), making this the property that is LESS for D2O. All other listed properties — density, boiling point, and latent heat — are higher for D2O.

Related JEE Advanced Chemistry questions

• In its interactions with potassium periodate (KIO4) and hydroxylamine (NH2OH), hydrogen peroxide functions respectively as a
• Among the two isomers of hydroxybenzoic acid, the ortho isomer is a stronger acid compared to its para counterpart. Which of the following best explains this observation?
• In which of the following reactions is hydrogen gas produced?
• How many of the following compounds are classified as saline (ionic) hydrides? NaH, MgH2, CaH2, VH0.56, Fe3H, NH3
• In how many of the following processes is H2 gas released as a product? (i) Na + H2O --> (ii) KH + H2O --> (iii) CO + H2 (steam, Fe2O3/Cr2O3 catalyst) --> (iv) Electrolysis of fused (molten) NaH (v) Electrolysis of acidic water
• The wavelength of the series limit (longest wavelength limit, i.e., the convergence limit) of the Lyman series of hydrogen is x angstrom. Calculate the wave number (in angstrom⁻¹) of the third line of the Balmer series of He+ ion.

⚔️ Practice JEE Advanced Chemistry free + battle 1v1 →