21-The Senate passed Missouri compromise on __________.

March 2, 1820

22-The House of Representatives passed Missouri compromise on ___________.

February 26, 1821

23-Missouri compromise worked for nearly _________ years.

Thirty

24-California was admitted to the Union as a stand-alone free state in _________.

1850

25-With the admittance of California to the Union, the number of Free States rose to ________.

Sixteen (16)

26-The Supreme Court of USA in __________, in the case of __________ declared __________ compromise as unconstitutional.

1857, Dred Scott, Missouri

27-Underground Railroad was a practice of helping the fugitive slaves of ________ America.

South

28-Wilmort Proviso, 1846 was designed to eliminate slavery within the land acquired as a result of the ____________.

Mexican War (1846 – 1848)

29-Historians considered __________ Act of 1854 as the single most significant event that lead to civil war.

Kansas-Nebraska

30-Slavery in America was abolished by the ___________ amendment to the US Constitution.

13^th