MCQs in

  •   Q: 1 The energy of the system and surrounding is conserved. This is a statement of: [Chemistry F.Sc]
          Law of mass action
          Law of definite proportion
          Law of conservation of energy
          Second law of thermodynamics
          None of the Above
  •   Q: 2 Which of the following statements is incorrect? [Chemistry F.Sc]
          dispersion force is the weakest type of intermolecular interactions
          the strong intermolecular attractions in H2O result from hydrogen bonding
          boiling point of H2S is less than H2O
          boiling point of non-polar substances tends to decrease with increasing molecular weight
          none of these
  •   Q: 3 This shape of a 2s orbital resembles [Chemistry F.Sc]
          a hockey puck
          an (American) football
          an ellipse
          a sphere
          none of these
  •   Q: 4  2SO2 + O2 2SO3 [Chemistry F.Sc]
          None of the Above
  •   Q: 5 Direct conversion of solids into vapours is called [Chemistry F.Sc]
          Solvent extraction
  •   Q: 6 The enthalpy change ΔH for an endothermic process is [Chemistry F.Sc]
  •   Q: 7 Which of the following processes most clearly suggests that matter is made up of particles in continous motion? [Chemistry F.Sc]
          None of the Above
  •   Q: 8 Liquid gets the shape of the container when it is poured into it. Which one of the following reasons justifies it? [Chemistry F.Sc]
          Liquid do not have definite shape
          Liquid do not have definite volume
          Lieuid is highly compressible
          Liquid molecules can slide over each other
  •   Q: 9 The ttractive forces between the partial positive end of one molecule and partial negative end of other molecule are called [Chemistry F.Sc]
          Dipole-dipole forces
          Ion dipole-dipole forces
          London dispersion forces
          Debye forces
  •   Q: 10 The correct set of n , l , m quantum numbers for the unpaired electron of clorine atom is : [Chemistry F.Sc]
          2 , 1 , 0
          3 , 1 , 1
          3 , 0 , 0
          2 , 1 , 1
          None of the Above
  •   Q: 11 If NH3 gas is dissolved into water , pH of the solution: [Chemistry F.Sc]
          May increase or decrease
          Not effected
          None of the Above
  •   Q: 12 Metallic lusture exhibited by sodium is explained by : [Chemistry F.Sc]
          Diffusion of sodium ions
          Qscillation of loose electrons
          Existence of body centered cubic lattice
          Excitation of free protons
          None of the Above
  •   Q: 13 Which factor affect the rate of evaporation? [Chemistry F.Sc]
          Surface area
          Vander wall's force
          Allof them
          None of the Above
  •   Q: 14 Consider the following redox reaction. Zn+dil HNO3? Zn (NO3)2 + N2O + H2O The coefficient number of HNO3 in the equation is [Chemistry F.Sc]
  •   Q: 15 In electrolytic solution conductance of electricity is due to [Chemistry F.Sc]
          free electrons
  •   Q: 16 Why is ethanoic acid a stronger acid in liquid ammonia than in water? [Chemistry F.Sc]
          Ethanoic acid molecules form H-bond with water
          Ethanoate ions form H-bond with water
          Ethanoic acid is more soluble in ammonia than in water
          Ammonia is a stronger base than water
  •   Q: 17 Separation of a solid from its hot saturated solution by cooling is called [Chemistry F.Sc]
          solvent extraction
  •   Q: 18 From 2 moles of KCLO3 how many liters of oxygen gas can be produced at STP by decomposition of all the KCLO3? [Chemistry F.Sc]
          None of the Above
  •   Q: 19 The relative atomic mass of oxygen is 16amu. What is the mass of 2 mole of oxygen gas? [Chemistry F.Sc]
          None of the Above
  •   Q: 20 On dry distillation of calcium formate a compound 'X' is obtained. What is ''X''? [Chemistry F.Sc]
          Acetic acid