IIT JEE Chemistry - Revision Set 3

1. Potential difference of the electrical double layer formed in a colloidal sol is called
(a) Zeta potential (b) Nernst potential (c) EMF (d) Brownian potential

2. The nucleidic ratio, ₁³H to ₁¹H in a sample of water is 8.0×10^-8 : 1. Tritium undergoes decay with a half life period of 12.3 years. How many tritium atoms would 10.0 g of such a sample contain 40 years after the original sample is collected.

3. 1 gm of charcoal adsorbs 100 ml 0.5 M CH₃COOH to form a monolayer, and thereby the molarity of CH₃COOH reduces to 0.49. Calculate the surface area of the charcoal adsorbed by each molecule of acetic acid. Surface area of charcoal = 3.01×10² m²/gm

4.Hydrogen bonding is maximum in

(a) ethanol (b) Diethylether (c) Ethyl chloride (d)Triethylamine

5. The critical temperature of water is higher than that of O₂ because the H₂O molecule has
(a) few electrons than O₂
(b) two covalent bonds
(c) dipole moment
(d)V-shape