701. An endothermic reaction is one in which:
A. Heat is converted into electricity
B. Heat is absorbed
C. Heat is evolved
D. Heat is converted into mechanical work
702. An exothermic reaction occurs when the substances that are reacting:
A. Are more active than the goods
B. Have less energy than the products
C. Have the same amount of energy as the goods
D. Are at a temperature higher than the goods
703. From the above data, the standard heat of formation of KOH in kcal Mol-I is:
A. – 68 + 48 – 14
B. – 68 – 48 + 14
C. 68 – 48 + 14
D. 68 + 48 + 14
704. Hess’s law deals with:
A. Changes in heat of reaction
B. Rate of reaction
C. Equilibrium constant
D. Impact of tension on the volume of a gas
705. 70,960 and -71,030 cal mol-l, respectively, of heat are produced when homoclinic and monoclinic sulfur are burned. How much heat will it take for rhombic sulfur to become monoclinic?
A. 70,960 Calories
B. 71,030 calories
C. – 70 Calories
D. + 70 Calories
706. All-natural processes spontaneously move in a certain direction that leads to:
A. Decrease of entropy
B. Increase of Enthalpy
C. Increase of free energy
D. Decrease of free energy
707. For a system in equilibrium G=O under conditions of constant:
A. Temperature and pressure
B. Temperature and volume
C. Pressure and volume
D. Energy and volume
708. The values for the reaction are 100 and 200 KJ, respectively. The heat of the reaction for will be:
A. 50 KJ
B. 100 KJ
C. 150 KJ
D. 300 KJ
709. The law of Lavoisier and Laplace illustrates:
A. The foundation of energy-based conversation
B. Equivalent of mechanical and thermal energy
C. The principle of the conservation of matter
D. Equivalent of mechanical and chemical energy
710. Colloidal solutions are purified by all except?
(A) Ultra Filtration
(B) Dialysis
C. Crystallization
(D) None of the above
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