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MCQs

Total Questions : 50 | Page 2 of 5 pages
Question 11. The relative atomic mass of Na is
  1.    1.008 amu
  2.    22.9898 amu
  3.    26.9815 amu
  4.    15.9994 amu
 Discuss Question
Answer: Option B. -> 22.9898 amu
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 12. The formula mass indicates the simplest ration between
  1.    cations only
  2.    anions only
  3.    atoms
  4.    cation and anions
 Discuss Question
Answer: Option D. -> cation and anions
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 13. The list which contains only elements is
  1.    air, water, oxygen
  2.    Hydrogen, oxygen, brass
  3.    Air, water, fire, earth
  4.    Calcium, Sulphur, carbon
 Discuss Question
Answer: Option D. -> Calcium, Sulphur, carbon
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 14. Over 70% of earth's crust is covered with
  1.    water
  2.    land
  3.    coal
  4.    trees
 Discuss Question
Answer: Option A. -> water
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 15. The smallest part of an element that cannot exist as a free state is
  1.    ion
  2.    charge
  3.    atom
  4.    molecule
 Discuss Question
Answer: Option C. -> atom
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 16. The mass of an atom relative to C-12 is
  1.    atomic mass
  2.    atomic number
  3.    nucleon number
  4.    relative atomic mass
 Discuss Question
Answer: Option D. -> relative atomic mass
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 17. A free radical has
  1.    unpaired electrons
  2.    paired electrons
  3.    no electrons
  4.    even number of electrons
 Discuss Question
Answer: Option A. -> unpaired electrons
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 18. Branch of chemistry dealing with the plantation and overcoming greenhouse effect is
  1.    Biochemistry
  2.    Organic chemistry
  3.    Environmental chemistry
  4.    Inorganic chemistry
 Discuss Question
Answer: Option C. -> Environmental chemistry
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 19. 1 mole of a substance refers to
  1.    molar mass
  2.    atomic mass
  3.    electron mass
  4.    neutron mass
 Discuss Question
Answer: Option A. -> molar mass
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 20. The number of protons in the nucleus constitute it's
  1.    atomic mass
  2.    atomic number
  3.    nucleon number
  4.    number of neutrons
 Discuss Question
Answer: Option B. -> atomic number
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

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