Post Utme Chemistry Questions
Question 601:
The equation C + Oâ‚‚ → COâ‚‚ shows carbon:
- A Decomposing into gas
- B Burning in oxygen
- C Reducing oxygen atoms
- D Replacing oxygen gas
Question 602:
The equation 2Na + Clâ‚‚ → 2NaCl shows sodium:
- A Replacing chlorine atoms
- B Combining with chlorine
- C Changing into gas
- D Decomposing into ions
Question 603:
The reaction 2AgNO₃ + Cu → Cu(NO₃)â‚‚ + 2Ag shows copper:
- A Displacing silver
- B Acting as catalyst
- C Decomposing nitrate
- D Forming precipitate
Question 604:
The reaction 2Hâ‚‚Oâ‚‚ → 2Hâ‚‚O + Oâ‚‚ is an example of:
- A Decomposition reaction
- B Displacement reaction
- C Combustion reaction
- D Neutralization reaction
Question 605:
The substance commonly used for softening permanent hard water is:
- A Dilute hydrochloric acid
- B Copper sulfate crystals
- C Potassium nitrate solution
- D Sodium carbonate solution