Chemistry - Acids, alkalis and titrations: Latest 2026 Examination Questions with
Graded A+ Verified Answers 2026 Edition.
Why are synthetic indicators used in acid- They show a very sharp change of colour at the endpoint
alkali titrations? of a neutralisation reaction.
Name two common synthetic indicators Phenolphthalein and methyl orange.
used in titrations.
Why is litmus unsuitable for acid-alkali The colour change is not sharp and it passes through a
titrations? purple transition colour in neutral solutions.
What is the colour of litmus in an acidic Red.
solution?
What is the colour of litmus in an alkaline Blue.
solution?
What is the colour of phenolphthalein in Colourless.
an acidic solution?
What is the colour of phenolphthalein in Pink.
an alkaline solution?
What is the colour of methyl orange in an Red.
acidic solution?
What is the colour of methyl orange in Yellow.
an alkaline solution?
What is the range of the pH scale? 0 to 14.
What pH value indicates a neutral pH 7.
solution?
How does pH relate to the acidity of a The lower the pH, the more acidic the solution is.
solution?
What is the pH range for a strong acid? pH 0-3.
What is the pH range for a strong alkali? pH 11-14.
What is the main limitation of using It only gives an approximate pH value and does not
universal indicator? provide a sharp enough colour change for accurate
Graded A+ Verified Answers 2026 Edition.
Why are synthetic indicators used in acid- They show a very sharp change of colour at the endpoint
alkali titrations? of a neutralisation reaction.
Name two common synthetic indicators Phenolphthalein and methyl orange.
used in titrations.
Why is litmus unsuitable for acid-alkali The colour change is not sharp and it passes through a
titrations? purple transition colour in neutral solutions.
What is the colour of litmus in an acidic Red.
solution?
What is the colour of litmus in an alkaline Blue.
solution?
What is the colour of phenolphthalein in Colourless.
an acidic solution?
What is the colour of phenolphthalein in Pink.
an alkaline solution?
What is the colour of methyl orange in an Red.
acidic solution?
What is the colour of methyl orange in Yellow.
an alkaline solution?
What is the range of the pH scale? 0 to 14.
What pH value indicates a neutral pH 7.
solution?
How does pH relate to the acidity of a The lower the pH, the more acidic the solution is.
solution?
What is the pH range for a strong acid? pH 0-3.
What is the pH range for a strong alkali? pH 11-14.
What is the main limitation of using It only gives an approximate pH value and does not
universal indicator? provide a sharp enough colour change for accurate
