Advertisements
Advertisements
Question
Give a reason why zinc displaces hydrogen from dilute sulphuric acid but copper does not.
Solution
Zinc (more electropositive) and being above [H] inactivity series displace hydrogen from dilute sulphuric acid but copper is below [H] in electrochemical series cannot displace hydrogen from sulphuric acid.
APPEARS IN
RELATED QUESTIONS
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 |
Complete the table given below.
| Heat on Copper Nitrate | Colour of acidic gas evolved |
State which of the substance given below evolve oxygen gas on thermal decomposition.
Trilead tetroxide
State which of the substance given below evolve oxygen gas on thermal decomposition.
Zinc nitrate
Define the following type of chemical change or reaction with a suitable example.
Direct combination reaction or synthesis
Define the following type of chemical change or reaction with a suitable example.
Decomposition reaction
Define the following type of chemical change or reaction with a suitable example.
Displacement reaction or substitution reaction
Convert hydrogen to hydrogen chloride by a direct combination reaction.
Give a balanced equation for the preparation of two different insoluble lead salts from their salt solutions by double decomposition precipitation.
Complete the statement by filling in the blank with the correct word:
Direct combination reaction of sulphur dioxide with water gives ________.
