Chemistry: General Knowledge Questions and Answers

Chemistry questions and answers are essential for preparing for competitive exams and entrance tests. In this section, you’ll find a variety of chemistry questions designed to strengthen your understanding and help you excel in exams like SSC, IBPS, PO, RBI, PSC, RAIL, PSU, and more.

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Chemistry Questions and Answers

Q1. __________ element has two orbits that are completely filled.

[A] Kr

[B] Ne

[C] He

[D] Ar

Q2. Is C2 Paramagnetic or Diamagnetic?

[A] Ferromagnetic

[B] Paramagnetic

[C] Diamagnetic

[D] Can’t be determined

Q3. What is the oxidation number of sulfur in H2S?

[A] 1

[B] 2

[C] -2

[D] -1

Q4. What is the structure of IF7?

[A] Trigonal bipyramid

[B] Square pyramid

[C] tetrahedral

[D] Pentagonal bipyramid

Q5. __________ is not acidic.

[A] CCl4

[B] PCl4

[C] PCl3

[D] SbCl4

Q6. A mixture of sand and naphthalene can be separated by

[A] Chromatography

[B] Fractional distillation

[C] Sublimation

[D] Any of them

Q7. Permanent Hardness of water can be removed by adding

[A] Potassium permanganate

[B] Bleaching powder

[C] Chlorine

[D] Washing soda

Q8. What is the third most common gas found in the air we breathe ?

[A] Argon

[B] Carbondioxide

[C] Hydrogen

[D] Neon

Q9. How many molecules are present in one mole of water?

[A] 7.02 x 1023 molecules

[B] 6.02 x 1026 molecules

[C] 6.02 x 1023 molecules

[D] 8.02 x 1022 molecules

Q10. Which of the following is NOT a property of bases?

[A] They turn red litmus blue

[B] They turn blue litmus red

[C] They have bitter taste

[D] They react with acids and neutralise them