Chemistry MCQs Online Quiz Test 47

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Federal public Service Commission Chemistry MCQs

Q.1: Hydration is a process in which———?

  1. Molecules are surrounded by solvent molecules
  2. Ions are surrounded by solvent molecules
  3. Both ions and molecules are surrounded by solvent molecules
  4. Both ions and molecules are surrounded by water molecules

D

Q.2: ppm means——–?

  1. parts of solute in 1000 parts of solvent
  2. parts of solvent in 1000 parts of solute
  3. parts of solute in one million parts of solution
  4. parts of solvent in one million parts of solute

C

Q.3: The relative lowering of vapour pressure is directly proportional to molality if the solution is——–?

  1. concentrated
  2. dilute
  3. saturated solution
  4. all of the above

B

Q.4: If electricity is passed through CuSO4 solution by using Pt electrode then which of the following possible change occurs ?

  1. H2 is deposited at cathode
  2. Colour of the solution becomes fade
  3. Cu is deposited at anode
  4. All are possible

B

Q.5: Which has maximum oxidation number ?

  1. N
  2. Cr
  3. S
  4. Mn

D

Q.6: In an electrolytic cell current flows ?

  1. From cathode to anode in outer circuit
  2. From anode to cathode outside the cell
  3. From cathode to anode inside the cell
  4. both B And C

B

Q.7: In a galvanic cell——–?

  1. Chemical energy is converted into electricity
  2. Chemical energy is converted into heat
  3. Electrical energy is converted into chemical energy
  4. Electrical energy is converted into heat

A

Q.8: Molten NaCl conducts electricity due to the presence of——–?

  1. Free electrons
  2. Free molecules
  3. Free ions
  4. Atoms of Na and Cl

C

Q.9: Electricity in voltaic cell is produced due to———?

  1. neutralization
  2. oxidation
  3. reduction
  4. both B And C

D

Q.10: In electrolytic cell electricity carries——–?

  1. spontaneous reaction
  2. non-wpontaneous reaction
  3. neutralization
  4. all of above

B