Boiling does not occur when a liquid is heated in a closed vessel. Comment on the statement.

Eventhough the first element in the periodic table is Hydrogen, it does not have a fixed position in the periodic table. Comment on this statement. Outline the similarities of hydrogen with the first group element as well as the Halogen family.

When we step on a thorn, we withdraw our legs suddenly, if we are taking this thorn out, we will not withdraw our legs. Comment on these two statements.

2AB_(2)(g) iff A_(2)(g)+2B_(2)(g) . 5 moles of AB_(2) were heated in a closed vessel to constant temperature. Equilibrium was attained by the time 2 moles of it dissociated. If the equilibrium pressure was 12 atm, the K_(p) of the reaction is very close to

Classify the following as open, closed or isolated system i) A beaker containing open boiling water ii) A chemical reaction in a closed vessel iii) A cup of tea placed on a table iv) Hot water in perfectly insulated closed container

0.75 mole of solid A_(4) and 2 moles of gaseous O_(2) are heated in a sealed vessel, completely using up the reactants and producing only one compound. It is found that when the temperature is reduced to the initial temperature, the contents of the vessel exhibit a pressure equal to half the original pressure. What conclusions can be drawn from these data about the product of the reaction?