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MCQs

Total Questions : 194 | Page 17 of 20 pages
Question 161. Upon burning, Hydrogen (H₂) forms
  1.    water vapors
  2.    hydrogen oxide
  3.    hydrogen ions
  4.    hydrocarbon
 Discuss Question
Answer: Option A. -> water vapors
Answer: (a).water vapors
Question 162. Exothermic reactions does not include
  1.    upon heating, hydrogen results in water
  2.    neutralization of acids and alkalis
  3.    respiration
  4.    breaking of chemical bond
 Discuss Question
Answer: Option D. -> breaking of chemical bond
Answer: (d).breaking of chemical bond
Question 163. Thermal decomposition does not occur in
  1.    carbonates
  2.    hydroxides
  3.    sulphates
  4.    nitrates
 Discuss Question
Answer: Option C. -> sulphates
Answer: (c).sulphates
Question 164. Under thermal decomposition, copper nitrate gets converted into
  1.    Copper oxide
  2.    Nitrogen oxide
  3.    Oxygen
  4.    all of the above
 Discuss Question
Answer: Option D. -> all of the above
Answer: (d).all of the above
Question 165. The units of heat capacity are
  1.    KJ/mol
  2.    KJ/L
  3.    KJ/K
  4.    KJ/cal
 Discuss Question
Answer: Option C. -> KJ/K
Answer: (c).KJ/K
Question 166. The apparatus used to measure the enthalpy of combustion of a substance is
  1.    Glass calorimeter
  2.    Copper calorimeter
  3.    Bomb calorimeter
  4.    All of above
 Discuss Question
Answer: Option C. -> Bomb calorimeter
Answer: (c).Bomb calorimeter
Question 167. During melting, there is change in intermolecular distances and potential energy of atom, ion and molecules
  1.    Maximum
  2.    Minimum
  3.    Least
  4.    Negligible
 Discuss Question
Answer: Option D. -> Negligible
Answer: (d).Negligible
Question 168. Amount of heat absorbed in melting one mole of solid is
  1.    Molar heat of Fusion
  2.    Molar heat of vapourziation
  3.    Molar heat of reaction
  4.    Molar heat of formation
 Discuss Question
Answer: Option A. -> Molar heat of Fusion
Answer: (a).Molar heat of Fusion
Question 169. In endothermic reaction, the enthalpy change of products is
  1.    Positive
  2.    Negative
  3.    Neutral
  4.    Partial positive
 Discuss Question
Answer: Option A. -> Positive
Answer: (a).Positive
Question 170. The concept of entropy was introduced by
  1.    Kelvin
  2.    Rudolph Clausius
  3.    Robert Brown
  4.    Neil Bohr
 Discuss Question
Answer: Option B. -> Rudolph Clausius
Answer: (b).Rudolph Clausius

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