Advertisements
Advertisements
Question
Give a balanced equation for the following type of reaction:
A decomposition reaction of a salt which leaves behind a silvery metal.
Solution
Decomposition reaction of a salt leaving behind a silvery metal.
\[\ce{2AgNO3->[\Delta]\underset{\text{silvery residue}}{2Ag} + 2NO2 + O2}\]
\[\ce{2AgCl->[sun light]\underset{\text{silvery residue}}{2Ag} + Cl2}\]
APPEARS IN
RELATED QUESTIONS
State the type of reactions for the following represent and balance the ones that are not balanced.
Fe + CuSO4→ FeSO4 + Cu
Match the following:
|
a. Zn(s) + H2SO4(aq) → ZnSO4(aq) + H2(g) |
i. Photochemical decomposition |
|
b. \[\ce{2AgCI(s) ->[Sunlight] 2Ag(s) + CI2(g)}\] |
ii. Thermal decomposition |
|
c. \[\ce{2KCI ->[Electricity] 2K + CI2}\] |
iii. Displacement reaction |
|
d. \[\ce{2HgO(s) ->[\Delta] 2Hg(s) + O(g)}\] |
iv. Electrolytic decomposition |
Decomposition reactions can occur by heat.
Give two balanced reactions for each.
Select the correct salt from list II which on thermal decomposition exhibits the change in colour from list I.
| List I | List II |
| 1. Light green to black | A: Copper carbonate |
| 2. White to yellow [heated state] | B: Hydrated Copper sulphate |
| 3. Blue to black | C: Copper nitrate |
| 4. Orange to green | D: Ammonium dichromate |
| 5. Blue to white | E: Zinc nitrate |
State which of the substance given below evolve oxygen gas on thermal decomposition.
Zinc carbonate
The reaction can be classified as:
State which of the following type, take place in the reaction is given below.
\[\ce{Cl2 + 2Kl->2KCl + l2}\]
The reaction can be classified as:
State which of the following type, take place in the reaction is given below.
\[\ce{AgNO3 + HCl->AgCl + HNO3}\]
Define the following type of chemical change or reaction with a suitable example.
Decomposition reaction
Give a balanced equation for thermal decomposition of lead nitrate
Explain the term double decomposition precipitation reaction.
