Chemistry MCQ Quiz Hub

1. The commonly used coolant in refrigerators is
Ammonia
Nitrogen
Freon
Oxygen

2. Rayon is chemically
Glucose
Amylase
Cellulose
Pectin

3. Which of the following is an Inert Gas?
Hydrogen
Nitrogen
Oxygen
Argon

4. Which is the best definition of activation energy?
the energy required to break the bonds of reactant molecules
the energy required to end a chemical reaction
the energy required to bind a substrate to an active site
the energy required to re-form bonds in product molecules

5. Which of the following is not an allotrope of carbon?
Diamond
Graphene
Ethylene
Buckminsterfullerene

6. Which formula represents a polar molecule?
C-O
C-N
H-N
All of the above

7. Which kind of energy is stored in a chemical bond?
Potential energy
Kinetic energy
Both A & B
None of the above

8. After cleaning the thermometer should be placed in
Sanitizer
Ice cold water
Mercury
None of the above

9. An ionic bond is formed when
sharing of electrons
transfer of electrons
Both A & B
losing of protons

10. Anaerobic glycolysis occurs without
water
glucose
oxygen
All of the above

11. What is the common characteristic of the elements of the same group in the periodic table?
Electrons in outer most shell
Total number of electrons
Total number of protons
Atomic weight

12. What unit is used to measure weighted average atomic mass?
amu
gram/mole
Both A & B
1/mole

13. Which of the following reactions are redox reactions?
Ba(s)+Cl2(g)--->BaCl2(s)
Mg(s)+Br2(l)--->MgBr2(s)
Al(s)+3Ag^+(aq)--->Al^3+(aq)+3Ag(s)
All of the above

14. Which among the following will be a negative ion?
If it has more electrons than protons
If it has more electrons than neutrons
If it has more protons than electrons
If it has more protons than neutrons

15. Which of the following is a property of sodium hydroxide?
It is insoluble in ether and other Non-polar solvents
It is slowly soluble in water
It has an odor of rotten egg smell
All the above

16. Which among the following is used in making liquors medicines and as a fuel in aircrafts?
Propyl alcoho
Dimethyl alcohol
Ethyl alcohol
Methyl alcohol

17. 1 Mole of CO2 mass is
32 gms
44 gms
16 gms
12 gms

18. Glycolysis is the conversion of
Glucose to pyruvate
Glucose to proteins
Pyruvate to glucose
All the above

19. Butter is colloid formed when
Proteins are dispersed in water
Water is dispersed in fat
Fat globules are dispersed in water
Carbohydrates are dissolved in water

20. An ionic bond involves _____.
the sharing of a single pair of electrons
an attraction between ions of opposite charge
the unequal sharing of an electron pair
water avoidance

21. Which of the following has the lowest melting point?
Zinc
Silver
Lead
Tin

22. Non-metals are generally more electronegative due to their:
large number of electrons
smaller atomic radii
smaller atomic number
smaller ionization energy

23. The main cause of rancidity in foods is the ____ of fats and oils.
hydrolysis
clarification
reduction
oxidation

24. Which of the following statements is INCORRECT? I) Bleaching powder is a pale yellow powder II) Dry NH3 gas turns red litmus blue III) The pH of rain water is nearly 7 IV) The pH of acid rain is nearly 5.6
I II and IV
II and III
I and IV
Only II

25. as is used as an illuminating gas
Methyl
Propane
Butene
Ethyne

26. Which one of the following gases dissolves in water to give acidic solution?
Carbon dioxide
Oxygen
Nitrogen
Hydrogen

27. Chlorine gas is used in the manufacture of:
Baking powder
Bleaching powder
Baking soda
Washing soda

28. Through which conversion is energy released?
CO2 and H2O to C6H12O6 and O2
NADP+ to NADPH
ADP to ATP
ATP to ADP

29. The (O-H) bond in CH3OH is _____.
polar covalent
ionic
non polar covalent
cationic

30. An example of an extensive property of matter is
Volume
Mass
Density
All the above

31. Isotopes are atoms of the same element that have different
numbers of neutrons
numbers of electrons
numbers of protons
atomic numbers

32. Which of the following compounds from nitrites with nitrous acid?
Primary amines
Secondary amines
Tertiary amines
All of these

33. Hydrogen bonds and hydrophilic interactions are
Strong chemical bonds that hold together the atoms within a molecule
Weak chemical bonds that hold together the atoms within a molecule
Strong chemical bonds that link together separate molecules
Weak chemical bonds that link together separate molecules

34. Bullet proof material is made up of which polymer?
Poly carbonates
Poly vinyl
Poly amides
Polychloride

35. Which one of the following statements regarding histone proteins is correct?
Histones are proteins that are present in mitochondrial membrane
Histones are proteins that are present in nucleus in association with DNA
Histones are proteins associated with lipids in the cytosol
Histones are proteins associated with carbohydrates in the cytosol

36. A feature of catabolic reactions is that they
occur only in mitochondria
occur only during loss of body weight
nvolve release of energy
involve consumption of energy

37. Which of the following is a property of an acid?
Acids reacts with metals
Acids taste sour
Acids turn blue litmus paper red
All the above

38. Ammonia can be dried by
Sulphuric acid
Calcium oxide
Phosphorus pentoxide
Calcium Chloride

39. The PCl5 molecule has trigonal bipyramidal structure. Thereforethe hybridization of p orbitals should be
sp2
sp3
dsp2
dsp3

40. Removal of oil and grease from sewage [waste water]
Skimming
Filtration
Screening
None of the above

41. The atomic mass of an element depends upon the
number of electrons
number of protons
number of neutrons
All of the above

42. Which chemical bond most likely stores the most energy?
Single bond
Double bond
Both A & B
None of the above

43. PET is a very familiar form of _____________. It is used for making bottles.
Nylon
Acrylic
Polyester
Rayon

44. Coagulation during water treatment is designed to remove
Sand and gravel
Bad smells
Pathogenic microorganisms
Particles suspended in water

45. Which subatomic particle has a positive charge?
Proton
Neutron
Electron
Ion

46. Methyl alcohol and Ethyl alcohol differ in molecular mass by ........ units.
13
14
12
16

47. Permanent hardness of water may be removed by the addition of
Alum
Lime
Sodium Carbonate
Potassium Permanganate

48. Who first discovered the every eighth element had properties similar to that of the first?
Newlands
Moseley
Dobereiner
Mendeleev

49. Which gas is a source of natural groundwater pollution?
Helium
Krypton
Radon
Argon

50. Stoichiometry is based on
Law of conservation of energy
Law of conservation of mass
Newtons 1st law
Keplers law