IB myp 4-5 Chemistry – Practice Questions- All Topics
Topic :Types of chemical reaction-Formation of salts
Topic :Types of chemical reaction-Weightage : 21 %
All Questions for Topic :acids and bases,neutral solutions,acid/base reactions,$\mathrm{pH}$ and indicators,formation of salts,uses of salts,redox reactions,reactivity series,extraction of metals and corrosion,electrochemical cells
Question:
Construct balanced half-equations for the reactions occurring at the anode and the cathode, and the overall chemical equation.
▶️Answer/Explanation
Ans: Anode: 2Cl–(l) → Cl2(g)+ 2e–
Cathode: Zn2+(l) + 2e– → Zn(s)
Overall: 2Cl–(l) + Zn2+(l) → Cl2(g) + Zn(s)
Question:
In terms of a change of state, what process is involved in the formation of a molten salt?
▶️Answer/Explanation
Ans: Melting (or fusion); solid to liquid.
Question:
What observations would you make during the electrolysis of molten sodium chloride?
▶️Answer/Explanation
Ans: Yellow–green vapor produced (chlorine gas).