Chemistry MCQs Online Quiz Test 25

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MCAT Chemistry MCQs Online Quiz Test

Q.1: Which of the following will give phosphoric acid one reaction with water———?

  1. PCI5
  2. P2O3
  3. P2O5
  4. All of the above


Q.2: Phosphorus is a Greek word and it means———?

  1. Light bearing
  2. Fire
  3. Impure
  4. Tetrahedral


Q.3: Allotropic form of phosphorus that is poisonous is———-?

  1. White
  2. Red
  3. Black
  4. Violet


Q.4: Acetic anhydride can be obtained by treating ethyl alcohol with———-?

  1. P2O5
  2. H2SO4
  3. Both A and B
  4. PCI5


Q.5: Phosphorous acid upon thermal decomposition yields phosphoric acid and———-?

  1. Phosphine
  2. Phosphorus
  3. Water
  4. Phosphorus pentoxide


Q.6: P2O5 is a hygroscopic powder which sublimes at——-?

  1. 260°C
  2. 360°C
  3. 630°C
  4. 620°C


Q.7: Phosphoric acid is a weak acid and its basicity is———-?

  1. 1
  2. 3
  3. zero
  4. 2


Q.8: Total energy of a system is———?

  1. P.E + K.E
  2. P.E + heat energy
  3. K.E + heat energy
  4. P.E + mechanical energy


Q.9: Unit of heat in SI system is——–?

  1. J
  2. KCaL
  3. Cal
  4. GJ


Q.10: ——– is study about energy of a chemical system ?

  1. thermochemistry
  2. thermodynamics
  3. chemical kinetics
  4. stoichiometry