Chemistry Past Questions and Answers

How many moles of (H+) are there in 1 dm<sup style='font-size: smaller;'>3</sup> of 0.5 M solution of H<sub style='font-size: smaller;'>2</sub>SO<sub style='font-size: smaller;'>4</sub>?

wH<sub style='font-size: smaller;'>2</sub>SO<sub style='font-size: smaller;'>4</sub> + xAI(OH)<sub style='font-size: smaller;'>3</sub> → yH<sub style='font-size: smaller;'>2</sub>O + = zAI<sub style='font-size: smaller;'>2</sub>(SO<sub style='font-size: smaller;'>4</sub>)<sub style='font-size: smaller;'>3</sub>. The respective values of w.x.y and z in the equation above are?

A given mass of gas occupies 2 dm<sup style='font-size: smaller;'>3</sup> at 300k. At what temperature will its volume be doubled keeping the pressure constant?

Which of the following is a measure of the average kinetic energy of the molecules of a substance?

If 100 cm<sup style='font-size: smaller;'>3</sup> of oxygen pass through a porous plug in 50 seconds, the time taken for the same volume of hydrogen to pass through the same porous plug is?<br/>(O = 16, H = 1)