Chemistry Past Questions and Answers

A sample of air was bubbled into water. The PH of the water slowly changed from 7 to 6. Which of the following gases in the samples caused the change?

The most suitable indicator for the reaction between NaOH and HCOOH is?

consider the following reaction equation: 2Al(OH)\(_3\) + 3H\(_2\)SO\(_4\) →Al\(_2\)(SO4)\(_3\)(aq)+6H\(_2\)O. How many moles of tetraoxosulphate(vi)acid is needed to produce 0.5mol of aluminium tetraoxosulphate(vi)?

which of the following pairs of substances has the highest heat of neutralization?

When quicklime dissolves in water?