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MCQs

Total Questions : 50 | Page 5 of 5 pages
Question 41. The mass of carbon present in 44g of carbon dioxide is
  1.    12g
  2.    6g
  3.    24g
  4.    44g
 Discuss Question
Answer: Option A. -> 12g
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 42. The substance which has a formula mass of 133.5 amu is
  1.    MgCl2
  2.    S2Cl2
  3.    BCl3
  4.    AlCl3
 Discuss Question
Answer: Option D. -> AlCl3
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 43. The gram atomic mass of Zn is
  1.    23g
  2.    12g
  3.    63.54g
  4.    56.67g
 Discuss Question
Answer: Option C. -> 63.54g
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 44. Cookies and bread rise due to
  1.    conversion of washing soda into CO2
  2.    conversion of H2O in to CO2
  3.    conversion of baking soda into O2
  4.    conversion of baking soda in to CO2
 Discuss Question
Answer: Option D. -> conversion of baking soda in to CO2
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 45. When halogens are exposed to sunlight, they split up in to
  1.    atoms
  2.    ions
  3.    radicals
  4.    molecules
 Discuss Question
Answer: Option C. -> radicals
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 46. A free radical has
  1.    odd number of electrons
  2.    even number of electrons
  3.    no electrons
  4.    none of above
 Discuss Question
Answer: Option A. -> odd number of electrons
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 47. The number of protons and neutrons in the nucleus if the atomic number of an element is 17 and the mass number is 35, is
  1.    17 and 18
  2.    17 and 19
  3.    17 and 20
  4.    17 and 21
 Discuss Question
Answer: Option A. -> 17 and 18
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 48. A substance whose all atoms have the same atomic number is
  1.    molecule
  2.    atom
  3.    element
  4.    ion
 Discuss Question
Answer: Option C. -> element
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 49. A hydrogen atom is
  1.    8.40% as massive as C-12
  2.    10% as massive as C-12
  3.    20% as massive as C-12
  4.    30% as massive as C-12
 Discuss Question
Answer: Option A. -> 8.40% as massive as C-12
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 50. A balloon filled with 5g of hydrogen contains
  1.    2.48 moles of H2
  2.    3.48 moles of H2
  3.    4.48 moles of H2
  4.    5 moles of H2
 Discuss Question
Answer: Option A. -> 2.48 moles of H2
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

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