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MCQs

Total Questions : 194 | Page 5 of 20 pages
Question 41. The concept of latent heat was introduced by
  1.    Newland
  2.    Joseph Black
  3.    Bohr
  4.    Rutherford
 Discuss Question
Answer: Option B. -> Joseph Black
Answer: (b).Joseph Black
Question 42. The latent heat of any substance is given by the formula
  1.    q = C x ΔT
  2.    Q = mL
  3.    q = Δs x T
  4.    q= s x t
 Discuss Question
Answer: Option B. -> Q = mL
Answer: (b).Q = mL
Question 43. When energy is used to bring the molecules closer, the energy decreases
  1.    Kinetic energy
  2.    Potential energy
  3.    Internal energy
  4.    heat energy
 Discuss Question
Answer: Option B. -> Potential energy
Answer: (b).Potential energy
Question 44. The unit of specific latent heat is
  1.    Kcal/Kg
  2.    KJ/L
  3.    KJ/Kg
  4.    Kg/mol
 Discuss Question
Answer: Option C. -> KJ/Kg
Answer: (c).KJ/Kg
Question 45. The curves which show the temperature when a substance is cooled down is called
  1.    Heating curve
  2.    Cooling curve
  3.    Isotherm
  4.    Parabola
 Discuss Question
Answer: Option B. -> Cooling curve
Answer: (b).Cooling curve
Question 46. Dipole-dipole forces are as effective as covalent bond
  1.    1%
  2.    2%
  3.    3%
  4.    4%
 Discuss Question
Answer: Option A. -> 1%
Answer: (a).1%
Question 47. Total heat content of a system is called
  1.    Entropy
  2.    Enthalpy
  3.    Heat capacity
  4.    State function
 Discuss Question
Answer: Option B. -> Enthalpy
Answer: (b).Enthalpy
Question 48. The heat of neutralization of a strong acid with a strong base is approximately
  1.    54.4 KJ/mol
  2.    55.5 KJ/mol
  3.    56.4 KJ/mol
  4.    57.4 KJ/mol
 Discuss Question
Answer: Option D. -> 57.4 KJ/mol
Answer: (d).57.4 KJ/mol
Question 49. Dipole-dipole forces operate reasonably in
  1.    Solids
  2.    Liquids
  3.    Gases
  4.    All of above
 Discuss Question
Answer: Option B. -> Liquids
Answer: (b).Liquids
Question 50. The change in enthalpy at constant pressure is equal to
  1.    Heat of reaction
  2.    Temperature of reaction
  3.    Volume of the reaction
  4.    Energy of material
 Discuss Question
Answer: Option A. -> Heat of reaction
Answer: (a).Heat of reaction

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