The false statement is: "Most workers had an eight-hour workday".
In fact, working conditions were very dangerous and exhausting, and people were forced to work sometimes in shifts up to 16 hours, and never shorter than 10 hours.
In fact, the reduction of the shift lenght was one of the main complaints of trade unions, when workers started to organize themselves and to claim for their rights.
After the revolution in 1848, the French achieved the 12-hour workday. In UK they obtained te 10-hour workday in 1947. The 8-hour workday was established for the first time in Uruguay in 1915.