Chemistry Past Questions and Answers

A jet plane carrying 3,000 kg of ethane burns off all the gas forming water and carbondioxide. if all the carbondioxide is expelled and all the water formed is condensed and kept on board the plane, then the gain in weight is

Liquid X, reacts with sodium trioxocarbonate (IV) (Na<sub style='font-size: smaller;'>2</sub>CO<sub style='font-size: smaller;'>3</sub>) to give a gas which turns calcium chloride solution milky X is

Which of the following statements is FALSE?

When sodium dioxonitrate (lll) (NaNO<sub style='font-size: smaller;'>2</sub>) dissolves in water, ∆H is positive. The process of dissolution is

The equilibrium reaction between copper (l) chloride and chlorine at 25<sup style='font-size: smaller;'>o</sup>C and 1 atmosphere is represented by the equation:<br/>2CuCl +Cl<sub style='font-size: smaller;'>2</sub> ⇌ 2 CuCl<sub style='font-size: smaller;'>2</sub> ∆H = - 166 KJ. Which of the following statements is TRUE for the reaction, pressure remaining constant?