Observation

Majority of the candidates that responded to this question performed averagely. Some of them wrote wrong charges on ions.

In part (a), majority of the candidates wrote the correct observation when filtrate is reacted with litmus paper.

In part (b), majority of the candidates could not write correct inferences from the observations.

In part (c), majority of the candidates wrote wrong observations and inferences.

In part (d), few candidates were able to name the gas present in the organic compounds.

The expected answers include:

D. The gas present is ammonia gas. NH3must have been confirmed in c (iii) to score