Solved Exercise, Chem-11, Ch-07

THERMOCHEMISTRY Q.01: Choose the correct answer: (i) If an endothermic reaction is allowed to take place very rapidly in the air, the temperature of the surrounding air:                     (a) Remains constant (b) Increases (c) Decreases (d) Remains unchanged ANSWER: (c)Decreases EXPLANATION: The endothermic reactions proceed by absorbing heat into the system from the surrounding. So, … Read more

Solved Exercise, Chem-11, Ch-04

LIQUIDS & SOLIDS Q.1. Choose the best answers from the given choices.   (i) London dispersion forces are the only forces present among the:                   (a) Molecules of water in liquid state. (b) Atoms of helium in gaseous state at high temperature. (c) Molecules of solid iodine. (d) Molecules of hydrogen chloride gas. Ans: (c) Molecules … Read more

Solved Exercise, Chem-11, Ch-02

EXPERIMENTAL TECHNIQUES IN CHEMISTRY Q.01: Select the most suitable answers from the given ones in each question:    (i) A filtration process could be very time consuming if it were not aided by a gentle suction which is developed:       (a) If the paper covers the funnel up to its circumference. (b) If the paper … Read more

Solved Exercise, Chem-11, Ch-01

BASIC CONCEPTS Here is the complete solution to textbook exercise of chapter-01, Chemistry-11: Q.1: Select the most suitable answer from the given ones in each question. (i) Isotopes differ in: (a) properties which depend upon mass (b) arrangement of electrons in orbitals (c) chemical properties (d) the extent to which they may be affected in … Read more