General Science MCQ Quiz Hub

1. What is the reason for different molecular arrangements as per VSEPR theory?
 To minimize mutual repulsion
To minimize mutual attraction
To minimize surface tension
To have the minimum area

2. What is the bond angle in case of Ammonia molecule?
120°
 150°
66°
107°

3. Which of the following represents the bond order in Molecular orbital theory?
 half the difference between the number of bonding and antibonding electrons
twice the difference between the number of bonding and antibonding electrons
the difference between the number of bonding and antibonding electrons
 the sum of the number of bonding and antibonding electrons

4. What is the dipole moment in BF3 molecule?
0
1
1.85
6.22

5. Choose the correct statement:
Tooth enamel is made up of calcium phosphate
Tooth decay starts when the pH of the mouth is lower than 5.5
 Both a and b
None

6. Which of the following comprises a standard hydrogen electrode?
a copper electrode coated with carbon black
an iron electrode coated with platinum black
a platinum electrode coated with platinum black
a gold electrode coated with carbon black

7. What is the S.I unit of Molar conductivity?
S m3 mol-2
S m2 mol-2
 S m-1 mol2
S m2 mol-1

8. Which of the following represents Reduction?
 Losing one or more electrons
Gaining one or more electrons
 Losing Hydrogen atoms
Liberating hydrogen gas

9. What percentage of Human body is made up of carbon?
12
18.5
28.8
44.2

10. What happens to the molar conductivity of a weak electrolyte in case of dilution?
No change
increases slowly
 increases steeply
 decreases slowly

11. Which of the following represents Reduction?
Losing one or more electrons
Gaining one or more electrons
Losing Hydrogen atoms
 Liberating hydrogen gas

12. What is the product of the reaction between Ethanol and excess concentrated sulphuric acid at 443K?
Ethane
 Ethene
Ethyne
Methane

13. What is the H-C-H bond angle in a methane molecule?
120°
 75°
109.5°
150°

14. Which of these polymers is produced by a condensation reaction between ethylene glycol and ortho-phthalic acid?
Neoprene
Teflon
Poly ethelene glycol phthalate
None of the above

15. Which of these polymers is used for controlled drug release in the body?
PLA
PHBV
PGA
 PCL

16. Which of the following is a polymer of amino acids?
Starch
 Cellulose
 Proteins
None of the above

17. Which of the following is a property of Alkanes?
 Alkanes are unreactive at normal conditions
 Alkanes are also known as Paraffins
 Both a and b
None

18. Which of the following features are considered for a compound to be aromatic?
Planarity
Complete delocalisation of the π electrons in the ring
Presence of (4n + 2) π electrons in the ring where n is an integer
All of the above

19. Which of the following is correct about Aromatic hydrocarbons?
 They are also called as Arenes
 They are polar molecules
 Aromatic hydrocarbons are miscible in water
 All of the above

20. Which of the following hydrocarbon is the source of Natural rubber?
isoprene
 Benzene
Butene
Methanol

21. Which of the following monomers produce Buna-n polymer?
 two parts of butadiene and styrene
four parts of butadiene and one part of isobutylene
 two parts of butadiene and one part of acrylonitrile
None of the above

22. Which of the following metal is the key component of Vitamin B12?
 Iron
Zinc
Copper
 Cobalt

23. Which of the following metals is commonly used to increase the strength of steel alloys?
Bismuth
 Boron
Tin
Molybdenum

24. Which of the following non-metals is used in the manufacturing of match sticks?
Carbon
Nitrogen
Sulphur
Phosphorous

25. Which of the following is used as a food preservative?
Table salt
Salts of sorbic acid
Sodium benzoate
All of the above

26. Which of these drugs is called as the ‘love drug’?
 Mescalin
 MDMA
Dextromethorphan
Ketamine

27. Which of the following gas is also known as laughing gas?
Nitrous oxide
Nitrogen dioxide
Nitrogen hydroxide
Nitrogen peroxide

28. What happens to a helium atom when it loses an electron?
 It becomes an alpha particle
 It becomes a negative helium Ion
 It becomes a positive Helium ion
It becomes a proton

29. Which of the following is the process to remove calcium and magnesium from hard water?
Filtration
Flocculation
Sedimentation
Water softening

30. What is used as a sowing agent in the preparation of soft drinks?
Phosphorus acid
 Boric acid
Benzoic Acid
Phosphoric acid

31. Which among the following metals is used for galvanization?
Zinc
Copper
Silver
Iron

32. Which of the following is not an example of Allotrope?
Steel
Graphite
Diamond
Charcoal

33. What is the process of conversion of solid state directly to gaseous state called?
Distillation
Condensation
 Sublimation
Evaporation

34. Which one of the following is not a Type of coal?
Lignite
Siderite
Anthracite
 Peat

35. Who is the author of the book “The Sceptical Chymist” that made distinction between chemistry and alchemy and marked beginning of modern Chemistry?
Oswald Croll
Edward Dyer
Georg Brandt
Robert Boyle

36. Which of the following gases were called Fixed Air by Scottish physician Joseph Black which is discovered in 1750s?
Oxygen
Carbon Dioxide
Methane
Nitric Oxide

37. Who discovered electron?
J. chadwick
Ernest Rutherford
J.J.Thomson
E.Goldstein

38. Most liquids that conduct electricity are solutions of acids, base and which of the following?
Aluminium
Copper
Iron
Salts

39. Who discovered that water is composed of two parts hydrogen and one part oxygen by volume?
 Pierre Robiquet
Joseph Louis Gay-Lussac
Henri-Victor Regnault
Georges Urbain

40. Which Indian scientists invented crescograph, a device for measuring the growth in plants?
Prafulla Chandra Ray
Sir Jagadish Chandra Bose
Venkatraman Ramakrishnan
C. N. R. Rao

41. Which element helped James Chadwick to discover Neutron?
Lithium
Beryllium
Boron
Carbon

42. If the mass of an atom is 37 and atomic number is 17, then what shall be number of neutrons and protons in it?
17 Neutrons, 17 Protons
20 Neutrons, 17 Protons
17 Neutrons, 20 Protons
 37 Protons, 17 Neutrons

43. Which two elements are combined to form candles?
 Paraffin Wax and Stearic Acid
Bees Wax and Stearic Acid
 Higher Fat Acids and Stearic Acid
 Bees Wax and Paraffin Wax

44. Which one of the following forms the chief constituent of Vinegar?
Formic acid
Acetic acid
Salicylic acid
 Oxalic acid

45. Which is the main source of Naphthalene?
Charcoal
Camphor
Coal-tar
Titanium

46. What is the status of total energy at any time during the interconversion of energy from one form to other forms?
The total energy remains constant.
The total energy remains zero.
The total energy remain increasing.
The total energy remain decreasing.