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MCQs

Total Questions : 425 | Page 6 of 43 pages
Question 51. Positive charge holds electrons more tightly thus removal of electrons become more
  1.    easy
  2.    difficult
  3.    neutral
  4.    natural
 Discuss Question
Answer: Option B. -> difficult
Answer: (b).difficult
Question 52. Shielding effect is responsible for decrease in force of attraction of nucleus for electrons present in the
  1.    outer most shell
  2.    inner shell
  3.    valence shell
  4.    second shell
 Discuss Question
Answer: Option C. -> valence shell
Answer: (c).valence shell
Question 53. From left to right in a period, shielding effect remains
  1.    same
  2.    different
  3.    increase
  4.    decrease
 Discuss Question
Answer: Option A. -> same
Answer: (a).same
Question 54. Electro negativity values of elements is calculated by
  1.    bohar
  2.    Paul
  3.    Zeeman
  4.    stalk
 Discuss Question
Answer: Option B. -> Paul
Answer: (b).Paul
Question 55. In fluorine, incoming electrons are repel by the
  1.    thick cloud
  2.    outer most shell
  3.    nucleus
  4.    atomic radii
 Discuss Question
Answer: Option A. -> thick cloud
Answer: (a).thick cloud
Question 56. Very high boiling and melting points are of
  1.    covalent compounds
  2.    ionic compounds
  3.    metallic compounds
  4.    dative bonds
 Discuss Question
Answer: Option B. -> ionic compounds
Answer: (b).ionic compounds
Question 57. Organic solvents are
  1.    polar solvents
  2.    non-polar solvents
  3.    donors of Hydrogen ions
  4.    formed through sigma bonds
 Discuss Question
Answer: Option B. -> non-polar solvents
Answer: (b).non-polar solvents
Question 58. Compounds evaporating easily and giving off a smell are
  1.    ionic compounds
  2.    covalent bonds
  3.    metallic bonds
  4.    dative bonds
 Discuss Question
Answer: Option B. -> covalent bonds
Answer: (b).covalent bonds
Question 59. Substances inside fire extinguishers are examples of
  1.    ionic bonds
  2.    covalent bonds
  3.    metallic bonds
  4.    dative bond
 Discuss Question
Answer: Option B. -> covalent bonds
Answer: (b).covalent bonds
Question 60. Covalent compounds are poor conductors of electricity because
  1.    they do not have ions
  2.    the molecules cannot carry electricity
  3.    because they contain non-metals only
  4.    both a and b
 Discuss Question
Answer: Option D. -> both a and b
Answer: (d).both a and b

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