GCSE Chemistry – Separate Chemistry – 2 – Exam Style Questions with Answers

Hydrogen and oxygen are reactants in some fuel cells.
Which word equation shows the overall reaction that occurs in these fuel cells?

The concentration of dilute sulfuric acid can be determined by titration with sodium hydroxide solution of known
concentration.
25.00 cm of dilute sulfuric acid was measured out using a pipette and transferred to a conical flask.
A few drops of methyl orange indicator were added to the acid in the conical flask.
Sodium hydroxide solution was added to the acid from a burette until the indicator changed colour.
The titration was repeated until two concordant results were obtained.
The accurate result was the average of the two concordant results.
Describe the colour change seen at the endpoint of the titration.
from ........to........

A titration is to be carried out to find the concentration of a solution of sodium hydroxide.
The sodium hydroxide solution is titrated with dilute sulfuric acid.
The available apparatus includes a burette, a pipette, a funnel, a conical flask and an
indicator.
State one safety precaution that must be taken when using sodium hydroxide solution
and dilute sulfuric acid.

A student wants to carry out an accurate acid-alkali titration between hydrochloric acid and sodium hydroxide.
What pieces of apparatus and indicator would be most suitable for this investigation?

Transition metals and group 1 metals have many properties in common because they are all metals.
However some properties of transition metals are different from properties of group 1 metals.
Which is a property of transition metals but not of group 1 metals?