General Knowledge questions and answers for all type of competitive exams

General Knowledge questions and answers

Hi, friends today i'm sharing some important GK questions and answers,which are previously ask questions and answers and also these are repeatedly asked in many of the competitive exams ,especially PSC and other Gov. Exams. So friends study these questions and answers and do well.All the best.

CHEMISTRY

1. What is known as 'black led' ?
A) Diamond
B) Anthrasite
C) Coke
D) Graphite
Ans : D) Graphite

2. The noble gas which is radio active:
A) Krypton
B) Argon
C) Neon
D) Radon
Ans : D) Radon

3. The name hydrogen was given by:
A) Priestly
B) Cavendish
C) Lavosier
D) Humphrey Dewey
Ans : C) Lavosier

4. Which statement is not correct ?
A) Hydrogen is present in all acids
B) Hydrogen is the only element without election
C) Hydrogen is lightest gas
D) Deuterium is known as heavy hydrogen
Ans : B) Hydrogen is the only element without election

5. Malachite is the ore of:
A) Copper
B) Iron
C) Manganese
D) Aluminium
Ans : A) Copper

6. Second most abundant element in the earth's crust:
A) Silicon
B) Copper
C) Aluminium
D) Gold
Ans : A) Silicon

7. LSD stands for:
A) Lithium sodium devices
B) Lanthanide series diatoms
C) Lysergic acid diethylamide
D) Low starch drugs
Ans : C) Lysergic acid diethylamide

8. Name the atom bomb victims of Japan:
A) Hibakusha
B) Ikebana
C) Harakiri
D) Kimono
Ans : A) Hibakusha

9. Which is another name of glucose ?
A) Dextrose
B) Corn sugar
C) Grape sugar
D) All of these
Ans : D) All of these

10. Sour taste of 'Coca cola' is due to the presence of:
A) Acetic acid
B) Phosphoric acid
C) Hydrochloric acid
D) Formic acid
Ans : B) Phosphoric acid

11. Extraction of Aluminium is called:
A) Oxidation
B) Distillation
C) Electrolysis
D) Osmolysis
Ans : C) Electrolysis

12. Who discovered nucleus of atom:
A) John Dalton
B) Rutherford
C) Mosley
D) Priestly
Ans : B) Rutherford

13. Cinnabar is the ore of:
A) Zinc
B) Mercury
C) Copper
D) Silver
Ans : B) Mercury

14. The acid present in human intestine:
A) Nitric acid
B) Hydrochloric acid
C) Citric acid
D) Malic acid
Ans : B) Hydrochloric acid

15. Color of liquid oxygen:
A) Yellow
B) Blue
C) Red
D) Green
Ans : B) Blue

16. The path of the electron around the nucleus:
A) Ring
B) Orbit
C) Sphere
D) None of these
Ans : B) Orbit

17. What is the ratio of hydrogen and oxygen in water based on number of atoms?
A) 2:16
B) 2:1
C) 1:2
D) 16:2
Ans : B) 2:1

18. Bee sting leaves an acid which causes pain and irritation.The injected acid is:
A) Acetic acid
B) Sulphuric acid
C) Citric acid
D) Methanoic acid
Ans : D) Methanoic acid

19. Which one of the following is the main ingredient of cement?
A) Gypsum
B) Lime stone
C) Clay
D) Ash
Ans : A) Gypsum

20. Which one of the following is used for the preparation of antiseptic solution?
A) Potassium nitrate
B) Iodine
C) Iodine chloride
D) Potassium chloride
Ans : B) Iodine

21. Which is known as 'wonder metal' ?
A) Tellurium
B) Manganese
C) Silver
D) Titanium
Ans : D) Titanium

22. The heaviest gas element:
A) Nitrogen
B) Oxygen
C) Radon
D) Xenon
Ans : C) Radon

23. The least electronegative element:
A) Gallium
B) Radon
C) Caesium
D) Neon
Ans : C) Caesium

24. The most electronegative element:
A) Francium
B) Caesium
C) Flourine
D) Iron
Ans : C) Flourine

25. The green house effect was discoverved by ...................in 1824.
A) Joseph Fourier
B) Charles Fabry
C) Svante Arrhenius
D) Cavendish
Ans : A) Joseph Fourier

26. Which is harmful for ozone layer?
A) Chlorofluorocarbon
B) Agent orange
C) MIC
D) None of these
Ans : A) Chlorofluorocarbon

27. The second hardest natural substance:
A) Graphite
B) Marble
C) Enamel of teeth
D) Corrundum
Ans : D) Corrundum

28. Which natural substance has least expansion ?
A) Marble
B) Graphite
C) Diamond
D) Anthrasite
Ans : C) Diamond

29. The increase in the average temperature of earth's near surface air and oceans since the mid 20th century and its projected continuation is termed:
A) Green house effect
B) Global warming
C) Sustainable development
D) None of these
Ans : B) Global warming

30. The main constituent of compressed natural gas (CGS):
A) Butane
B) Propane
C) Methane
D) Pentane
Ans : C) Methane

31. The atmospheric pollutant as a result of the combination of fog and smoke:
A) Smog
B) Aerosol
C) Vapour
D) None of these
Ans : A) Smog

32. The acid present in milk:
A) Lactic acid
B) Formic acid
C) Nitric acid
D) Oxalic acid
Ans : A) Lactic acid

33. Sodium is prepared by:
A) Cyanide process
B) Downs process
C) Dow process
D) Bosch process
Ans : B) Downs process

34. The gas used to inflate tyres of automobiles:
A) Nitrogen
B) Butane
C) Oxygen
D) Ozone
Ans : A) Nitrogen

35. The main gas responsible for green house effect:
A) Oxygen
B) Hydrogen
C) Helium
D) Carbon dioxide
Ans : D) Carbon dioxide

36. The gas that turns lime water milky:
A) Nitrogen
B) Carbon dioxide
C) Helium
D) Hydrogen
Ans : B) Carbon dioxide

37. The gas used in refrigerators:
A) Methane
B) Freon
C) Ozone
D) Nitrogen
Ans : B) Freon

38. Which is known as 'marsh gas'?
A) Methane
B) Propane
C) Butane
D) Pentane
Ans : A) Methane

39. The term for the addition of artificial or natural substances,such as nitrates and phosphates through fertilizers or sewage,to an aquatic system:
A) Eutrophication
B) Enthalpy
C) BOD
D) COD
Ans : A) Eutrophication

40. The gas formed as the result of fermentation:
A) Nitrogen
B) Ammonia
C) Methane
D) CO2
Ans : D) CO2

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General Knowledge questions and answers for all type of competitive exams