Questions for competative exams"

11/03/2023

G.k.....
1. Gas used in LPG--Butane, Propane and Ethane
3. Gas with foul smell---Hydrogen Sulphide (H2S)
4. Laughing gas---Nitrous Oxide (N2O)
5. Gas used in refrigeration---Freon
6. Freon, the gas used in refrigeration is chemically
known as---Diflouro Dichloro Methane
7. Gobar gas is a mixture of---Methane, CO2 and
hydrogen
8. Gas mixed with oxygen and given to patients with
restricted breathing--- Helium
9. A major air pollutant, the percentage presence of
which is checked in vehicle pollution test---Carbon
monoxide
10. The gas which is responsible for the formation
of brown air in traffic congested cities--- Nitrogen
oxide
11. Major gaseous pollutant of areas located near
thermal power station----Suphur dioxide
12. Natural gas---Mainly methane with small
quantities of ethane and propane
13. Strong smelling substance added to LPG---Ethyl
Mercaptan or Ethanethiol
14. Gases responsible for depletion of ozone layer---
Chloroflouro carbons
15. Gas used in gas welding and also artificial
ripening of fruits---Acetylene
16. Gas used in electric bulbs---Argon
17. Gas used in flourescent lamps---Mercury vapour
18. Gas known as marsh gas---Methane
19. Gas responsible for acid rain---Sulphur dioxide
20. Gas most abundant in earth's atmosphere----N
itrogen (78%)
21. Percentage of oxygen in earth's atmosphere---21 % (appx)

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30/10/2022

29/09/2022

09/09/2022

Chemical formulas of vital compounds

1. Oxygen—O₂

2. Nitrogen—N₂

3. The hydrogen—H₂

4. Carbon dioxide—CO₂

5.Carbon monoxide—CO

6. Sulfur dioxide—SO₂

7. Nitrogen dioxide—NO₂

8. Nitrogen monooxide (nitric oxide) — NO

9. Dinitrogen oxide (sites oxide) — N₂O

10. Chlorine — Cl₂

11. The hydrogen chloride—HCl

12. Ammonia — NH₃

Sour
13. Hidrochloride acid — HCl

14. Sulfuric acid — H₂SO₄

15. Nitric acid — HNO₃

16. Phosphoric acid — H₃PO₄

17. Carbon acid — H₂CO₃

X will
18. Sodium hidroxi—NaOH

19. Potassium hidroxi—KOH

20. Calcium hidroxi—Ca(OH)₂

On
21. Sodium chloride—NaCl

22. Carbonate of sodium—Na₂CO₃

23. Calcium carbonate — CaCO₃

24. Calcium sulphate — CaSO₄

25. Ammonium sulphate — (NH₄)₂SO₄

26. Nitrate potassium—KNO₃

Our chemicals that commercial on chemical x
Professional x — IAPUC x — atomic formula
27. Wheel — calcium carbonate — CaCO₃

28. -- Why the truth — glucose — C6H₁₂O6

Alcohol — the 29. Alcohol — C₂H5OH
30. Cystic bowel — potassium hidroxi — KOH

31. Khan why soda — sodium bicarbonate — NaHCO₃

32. Sun — acid calcium — CaO

33. Gypsum — calcium sulphate — CaSO₄.2H₂O

34. T.L.T. — Try blaze Stalin — C6H₂CH₃(NO₂)₃

35. Dhoni Ka soda — sodium carbonate — Na₂CO₃

36. The edges of the too — copper sulphate — CuSO₄

37. USD — ammonium chloride — NH₄Cl

38. Fire — potassium aluminum sulphate — K₂SO₄Al₂(SO₄)₃.24H₂O

39. Busy then — calcium hidroxi — Ca(OH)₂

40. Activator — starch — C6H10O5

41. Leaping is — sites acid — N₂O

42. Red dwaraka — potassium permanent — KMnO₄

43. Li establishment of Dharma — did peroxide — Pb₃O₄

44. Dry ice — concrete carbon-di-acid — CO₂

45. Show — potassium nitrate — KNO₃

46. Vinegar — acetic acid why ve bunch — CH₃COOH

47. Suhagra — borax — Na₂B₄O7.10H₂O

48. Sprite — mail alcohol — CH₃OH

49. Slate — silica aluminum acid — Al₂O₃2SiO₂.2H₂O

50.Lost keys — fire of the sulphate — Fe₂(SO₄)₃

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