
Consider the statement and decide if it is a qualitative observation, a quantitative observation or an inference.
A vigorous reaction occurs and bubbles are seen on the surface of the metal in the solution.

Important Questions on Evidence
Consider the statement and decide if it is a qualitative observation, a quantitative observation or an inference.
Hydrogen gas is produced during the reaction.

Consider the statement and decide if it is a qualitative observation, a quantitative observation or an inference.
A temperature rise of is recorded.

Consider the statements and decide if it is a qualitative observation, a quantitative observation or an inference.
The metal turns a brown colour. It has rusted

Consider the statement and decide if it is a qualitative observation, a quantitative observation or an inference.
The mass of the reaction mixture decreases as the gas escapes from the conical flask.

Consider the statement and decide if it is a qualitative observation, a quantitative observation or an inference.
There is a loss of mass of over the first of the reaction.



