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Acids, Bases and Salts – GK Quiz with Answers – Level 2

Medium-level GK questions on pH comparisons, indicators, the chlor-alkali process, bleaching powder, Plaster of Paris and the natural acids found in vinegar, curd, tomato and nettle stings.

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Questions, answer key and solutions.

Questions
50
Duration
30 min
Marks
50

Negative marking

Attempts
100
Access
Free
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Normal practice, or a Simulated test

Both use the same questions. Normal practice is untimed and needs no account: choose an option and the answer and solution appear at once. The Simulated test is the real computer-based format, with one 30-minute clock, a question palette and full screen, and your score, the key and the solutions arrive when you submit.

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How the two modes differ
No account needed

Normal

Untimed

Every question on one page, loading as you scroll. Choose an option and see straight away whether it was right.

  • No timer. Nothing to start and nothing to submit. Stop whenever you like.
  • Answered as you choose. Tap an option and it is marked at once, with the correct answer shown.
  • Solutions in place. The explanation, and the video where one has been added, sit under the question.
  • Open to guests. Normal practice needs no sign-in.
Real exam conditions

Simulated

Timed CBT

The computer-based test format: one clock, a question palette, and a score the moment you submit.

  • A clock that does not pause. 30 minutes from the moment you begin, and the paper is submitted for you when it reaches zero.
  • Question palette. Answered, not answered and marked for review, section by section, as the real interface has it.
  • Full screen, proctored. The test takes over the screen; leaving it three times submits the paper.
  • Answers hidden until you submit. The key, the explanations and your score all arrive together at the end.

About this test

Acids, Bases and Salts GK Practice Quiz Level 2: pH, Indicators and Salts

This Level 2 GK set tests the pH scale, natural and synthetic indicators, the chlor-alkali process and the preparation and uses of common salts such as bleaching powder and Plaster of Paris. Aptitude360 frames these questions as statements, matching lists, odd-one-out items and sequences, so they test comparison and reasoning along with recall.

Topics covered in this acids, bases and salts set

  • Litmus from lichen, phenolphthalein, synthetic indicators and a curry stain turning reddish-brown with soap
  • Comparing pH values to pick the strongest acid and to identify basic solutions
  • How hydrogen ion concentration changes from one pH value to another
  • pH values linked to tooth decay and acid rain
  • Chlor-alkali products, bleaching powder and making drinking water germ-free
  • Plaster of Paris from gypsum, quicklime, and the formulas of baking soda and washing soda
  • Acids in vinegar, curd, tomato and nettle stings

Key chemistry concepts to revise for Level 2

  • A lower pH means a stronger acid, and the scale is logarithmic, so each step is a tenfold change in hydrogen ion concentration
  • Stomach acidity comes from excess hydrochloric acid, which antacids like milk of magnesia neutralise
  • The products formed when gypsum or baking soda is heated
  • Spotting the odd one out by the metal present in a chemical formula
  • Tooth enamel is calcium phosphate and decays when mouth pH falls too low

Revision tips for acids, bases and salts GK

  • Write each salt's chemical formula next to its common name until you can recall both ways
  • Practise calculating the ratio of hydrogen ion concentrations from pH values
  • Make a two-column list of natural sources and the acids they contain

Who should take this chemistry GK quiz

This set suits students preparing for General Awareness in competitive exams who already know the basic facts on acids and bases and want medium-level chemistry practice.

FAQs about Acids, Bases and Salts – GK Quiz with Answers – Level 2

What are the products of the chlor-alkali process?
When brine, a concentrated solution of sodium chloride, is electrolysed, it gives sodium hydroxide, chlorine gas and hydrogen gas.
How is Plaster of Paris made from gypsum?
Plaster of Paris is made by heating gypsum, which is calcium sulphate dihydrate, at about 373 kelvin. Heating removes part of its water of crystallisation and leaves calcium sulphate hemihydrate.
Which pH value shows the strongest acid?
The lowest pH value shows the strongest acid. A drop of one unit in pH means the hydrogen ion concentration is ten times higher.
What is bleaching powder used for?
Bleaching powder, calcium oxychloride, is made by passing chlorine over dry slaked lime. It is used to disinfect drinking water, to bleach cotton, linen and wood pulp, and as an oxidising agent.

Test structure

How the paper is split, and how long each part runs. A section you have finished cannot be returned to.

SectionQuestionsTime
Acids, Bases and Salts GK Level 25030 min

Marking & rules

Total marks
50 across 50 questions.
Negative marking
A wrong answer costs marks. Leaving a question unanswered costs nothing.
Attempts
100 in total. An attempt is spent the moment you begin one.

What you get when you submit

The analysis is ready the moment you submit the paper.

Score and accuracy

Marks, percentage, right, wrong and skipped, and the time you took.

Section by section

The same figures for each section, so a weak one cannot hide in an average.

The full answer key

Every question with your answer, the right one, the working, and the video where there is one.

Where you stand

Your score against the spread of everyone else who has sat this test.

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