PHYSICAL CHEMISTRY PYQS
10 PYQS in Physical Chemistry for Scientific assistant exam 1. Which of the following is not a crystal structure? Cubic Tetragonal Octagonal Monoclinic Answer: Octagonal Explanation: Seven types of crystal structures are Cubic, Tetragonal, Orthorhombic, Monoclinic, Hexagonal, Rhombohedral and Triclinic 2. Heat absorbed or released during a chemical reaction at constant pressure is called Enthalpy Entropy Free energy Internal Energy Answer: Enthalpy Explanation: At constant pressure the heat absorbed or released is called enthalpy (H) Entropy is a measure of disorder or randomness in a system (S) Internal energy is the sum of potential and kinetic energy that is the total energy of a thermodynamic system (U) Free energy is the portion of the total en...