Advertisements
Advertisements
Question
Give a reason why zinc displaces hydrogen from dilute sulphuric acid but copper does not.
Advertisements
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
(a) What is synthesis?
(b) What kind of chemical reaction is synthesis? Support your answer by an example.
State the type of reactions for the following represent and balance the ones that are not balanced.
2HgO → 2Hg + O2
Give an example of double displacement reaction, where a gas is evolved.
The reaction can be classified as:
State which of the following type, take place in the reaction is given below.
\[\ce{SO2 + 2H2O + Cl2->2HCl + H2SO4}\]
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.
Double decomposition reaction
Give a balanced equation for a direct combination reaction involving:
Two elements – one of which is a neutral gas and the other a yellow non-metal
Give a balanced equation for the following reaction of synthesis involving the formation of:
A salt – from a trivalent metal and a coloured gas.
Give a balanced equation for the following type of reaction:
A soluble salt of lead formed from an insoluble base by double decomposition – neutralization.
Differentiate between the following:
Synthesis reaction and a substitution reaction.
