Post Utme Chemistry Questions
Question 676:
The reaction 2Ca + Oâ‚‚ → 2CaO forms calcium oxide by:
- A Double decomposition
- B Displacement reaction
- C Combination reaction
- D Decomposition reaction
Question 677:
The equation Fe + 2HCl → FeClâ‚‚ + Hâ‚‚ forms:
- A Iron(II) chloride
- B Iron(III) oxide
- C Ferric sulphate
- D Iron carbonate
Question 678:
Which process usually increases solution concentration?
- A Reducing dissolved particles
- B Evaporating some solvent away
- C Decreasing solution temperature
- D Adding more solvent completely
Question 679:
A gas occupies the entire container because:
- A Molecules possess fixed shapes
- B Particles attract strongly always
- C Particles move randomly continuously
- D Particles remain fixed permanently
Question 680:
The standard temperature used at STP is:
- A 100 Kelvin temperature
- B 200 Kelvin temperature
- C 373 Kelvin temperature
- D 273 Kelvin temperature