Justify the following statements: b. The entropy of a substance increases on going from liquid to vapour state at any temperature:

"The entropy of solids increases on melting". Do you agree with the statement? Justify.

State whether the following statement is true or false- "The value of resistance of a metal increase with the rise of temperature"

From the following statements, tick () those which apply to solid substances alone.

Which of the following statement is not, correct? : Oxidant is a substance which increases the oxidation number of other substance, Reductant is a substance which decreases the oxidation number of other substance., The oxidation number of oxidant decreases, In oxidation there is decrease in oxidation number.

Which of the following statements are related to Boyle's law? a. When pressure increases volume decreases. b. When temperature increasen, volume increases. c. If P is pressure and V the volume N then P xxV is a constant. d. At constant temperature and pressure the volume of a gas is directly proportional to the number of molecules.

1 mole of ideal gas is taken in vessel. State the following statements as true or false. I)In gas equation R is constant. II) All real gases obey gas equation at all temperature and pressures