One Liner Chemistry GK Questions for Competitive Exams

One Liner Chemistry GK Questions
1. Which is the element found on the surface of the moon? – Titanium
2. ‘Gobar gas’ contains mainly which gas? – Methane
3. Which metal is non toxic in nature? – Gold
4. Which transition metal is in liquid state? – Mercury
5. Which oxyacid of halogen has maximum acidic nature? – HClO4
6. Which is the vitamin that is most readily manufactured in our bodies? – Vitamin D
7. Salts of which element pre vide colours to fireworks? – Strontiur and barium
8. In colourful diamond, Why are different colours present? – Due to impurities
9. In an atom the order of filling up of the orbitals is governed by which principle? – Aufbau principle
10. What is reduction of oxide with carbon at high temperature called? – Smelting
11. Which petroleum refinery product has the lowest boiling point? – Gasoline
12. Liquefied Petroleum Gas consists of mainly which gases? – Methane, butane and propane
13. In fireworks, how is the green flame produced? – Because of barium
14. By which a mixture of sand and naphthalene can be separated? – Sublimation
15. What is the Number of water molecules present in Mohr’s salt? – 8
16. In organic compound, halogens are estimated by which method? – Carius method
17. Which is the most malleable metal? – Gold
18. Which is the most unreactive gas? – Hydrogen
19. The isotopes of chlorine with mass number 35 and 37 exist in which ratio? – 3 : 1
20. Which material is very hard and very ductile? – Nichrome
21. Most of hydrocarbons from petroleum are obtained by which method? – Fractional distillation
22. The filament of an electric bulb is made of which metal? – Tungsten
23. By which method is the age of most ancient geological formations estimated? – C4 method
24. Which are macro-nutrients provided by inorganic fertilizers? – Nitrogen, Phosphorus and Potassium
25. What dose not contain a hydrophobic structure? – Rubber


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