Question

State your observations , identify the type of reaction and write the balanced chemical equation for the following reactions:

a) HSO4 added to a test tube containing Zn granules.

b) potassium iodide solution added to lead nitrate solution

c) lead nitrate is heated in a boiling tube


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Answer 1

Answer:

A. Displacement

B. Double displacement

C. Decomposition

Answer 2

Answer:

a) H2SO4 + Zn → ZnSO4 + H2

Displacement reaction

b) 2KI + Pb(NO3)2 → 2KNO3 + PbI2

Double displacement reaction

2Pb(NO3)2 → 2PbO + 4NO2 + O2

Thermal decomposition reaction

Explanation:

a) Zinc is a more reactive element than hydrogen. [ refer to reactivity series]

Therefore, zinc displaces hydrogen to form zinc sulphate.

b)There will be an exchange of ions.

c) When heated, lead nitrate decomposes to form lead oxide, nitrogen dioxide and oxygen.

Hope this helps :)