General Science | Questions
Chemistry questions with solutions
Chemistry is a General Science topic for competitive exams. It appears across bank and railway exams. This page has 30 solved chemistry questions written to the official pattern, with a worked solution under each.
- Question 1Easy
What is the chemical symbol for gold?
- A.AuCorrect
- B.Ag
- C.Gd
- D.Go
Show solution
The chemical symbol for gold is Au, from the Latin 'aurum'. Ag (argentum) is silver.
- Question 2Easy
The most abundant gas in the Earth’s atmosphere is:
- A.nitrogenCorrect
- B.argon
- C.oxygen
- D.carbon dioxide
Show solution
Nitrogen makes up about 78% of the atmosphere by volume, oxygen about 21%, and the rest is argon, carbon dioxide and trace gases.
- Question 3Easy
The pH value of pure water at 25 °C is:
- A.0
- B.7Correct
- C.14
- D.1
Show solution
Pure water is neutral, with a pH of 7; below 7 is acidic and above 7 is basic.
- Question 4Easy
At what temperature (in Celsius) does water freeze?
- A.50
- B.32
- C.100
- D.0Correct
Show solution
Water freezes at 0 degrees Celsius.
- Question 5Easy
What is the chemical symbol of iron?
- A.FeCorrect
- B.Ir
- C.Fr
- D.In
Show solution
The symbol of iron is Fe (from Latin ferrum).
- Question 6Easy
Water is made up of hydrogen and:
- A.OxygenCorrect
- B.Nitrogen
- C.Carbon
- D.Chlorine
- E.Sulphur
Show solution
Water has the formula H2O, that is two atoms of hydrogen combined with one atom of oxygen.
- Question 7Easy
Which is the most abundant gas in Earth's atmosphere?
- A.Oxygen
- B.NitrogenCorrect
- C.Carbon dioxide
- D.Argon
Show solution
Nitrogen makes up about 78% of the atmosphere by volume, with oxygen about 21%.
- Question 8Easy
At what temperature (in Celsius) does water boil at sea level?
- A.212
- B.0
- C.50
- D.100Correct
Show solution
Water boils at 100 degrees Celsius at sea level.
- Question 9Easy
What is the chemical symbol of silver?
- A.Au
- B.AgCorrect
- C.Sr
- D.Si
Show solution
The symbol of silver is Ag (from Latin argentum).
- Question 10Easy
What is the chemical symbol of sodium?
- A.Sn
- B.NaCorrect
- C.So
- D.Sd
Show solution
The symbol of sodium is Na (from Latin natrium).
- Question 11Easy
What is the chemical formula of water?
- A.CO2
- B.H2OCorrect
- C.O2
- D.NaCl
Show solution
Water is H2O — two hydrogen atoms and one oxygen atom.
- Question 12Easy
The hardest known natural substance is:
- A.Iron
- B.Quartz
- C.DiamondCorrect
- D.Graphite
Show solution
Diamond, a crystalline form of carbon, is the hardest natural material known.
These are 12 of 30 chemistry questions in the bank. Attempt the rest with instant feedback in the practice drills, or under a clock in the mock tests.
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Frequently asked questions
How many Chemistry questions are here?
This page shows 12 worked chemistry questions from a bank of 30, spanning 19 easy, 10 moderate and 1 hard. The full set is available to attempt in the timed-free practice drills and the mock tests.
Which exams ask Chemistry questions?
Chemistry is a standard General Science topic across bank and railway recruitment exams.
Are these Chemistry questions free, and are the answers reliable?
Yes. Every question is free, written in-house to the exam pattern rather than copied from a real paper, and the numeric answer keys are recomputed independently at build time — a wrong key fails the build rather than reaching you.