A rod of a neutron-absorbing substance used to vary the output power of a nuclear reactor.
Answer:
(1) I shifts toward product and II shifts toward reactant.
Explanation:
Increasing the temperature of an endothermic reaction (∆H is positive) shifts the equilibrium position to the right thus favoring product formation.
Increasing the temperature of an exothermic reaction (∆H is negative) shifts the equilibrium position to the left thus favoring the backward reaction.
The correct answer is B. When temperature decreases the cold water is more dense due to molecules being stiffened together.