Merits of mono-party system-
a. Political Stability – since there is no opposition party so government is strong and cannot be removed out of power.
b. Less Expensive- There is only one party and one candidate of the party, not so much money is spent on the election.
Demerit of one party system-
a. No political competition - it gives no choice to the voters.
b. Leads to dictatorship - Undemocratic government can become dictatorial.