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MCQs

Total Questions : 425 | Page 35 of 43 pages
Question 341. Other atoms in a molecules effects its
  1.    enthalpy
  2.    bond energy
  3.    volume
  4.    density
 Discuss Question
Answer: Option B. -> bond energy
Answer: (b).bond energy
Question 342. The formation of the bond is usually
  1.    exothermic
  2.    endothermic
  3.    ectothermic
  4.    hypothermic
 Discuss Question
Answer: Option A. -> exothermic
Answer: (a).exothermic
Question 343. Values are bond energies refer to broken bonds hence they are always
  1.    positive
  2.    negative
  3.    neutral
  4.    constant
 Discuss Question
Answer: Option A. -> positive
Answer: (a).positive
Question 344. Enthalpy changes are due to
  1.    breaking bonds only
  2.    forming bonds only
  3.    ionic bonds
  4.    braking and forming bonds
 Discuss Question
Answer: Option D. -> braking and forming bonds
Answer: (d).braking and forming bonds
Question 345. The symbol which represents bond energy is
  1.    B
  2.    E
  3.    H
  4.    BE
 Discuss Question
Answer: Option B. -> E
Answer: (b).E
Question 346. One of the four molecules that require the highest bond energy is
  1.    Nitrogen
  2.    Oxygen
  3.    carbon monoxide
  4.    Hydrogen
 Discuss Question
Answer: Option A. -> Nitrogen
Answer: (a).Nitrogen
Question 347. Bond breaking reflects
  1.    exothermic
  2.    endothermic
  3.    ectothermic
  4.    hypothermic
 Discuss Question
Answer: Option B. -> endothermic
Answer: (b).endothermic
Question 348. Bond energy refers to the
  1.    energy required to make a mole of a compound
  2.    energy required to break a mole of a compound
  3.    energy required to carry out sublimation
  4.    none of above
 Discuss Question
Answer: Option B. -> energy required to break a mole of a compound
Answer: (b).energy required to break a mole of a compound
Question 349. The bond length is C=C is
  1.    0.154
  2.    0.143
  3.    0.134
  4.    0.116
 Discuss Question
Answer: Option C. -> 0.134
Answer: (c).0.134
Question 350. The length of double bonds (=) is
  1.    shorter than single bonds
  2.    longer than single bonds
  3.    same as single bonds
  4.    none of above
 Discuss Question
Answer: Option A. -> shorter than single bonds
Answer: (a).shorter than single bonds

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