In 1856, ……………discovered a process by which impurities could be removed from iron. This purified refined iron came to be known as ’steel’, which helped in making more accurate tools, implements, weapons and machines.

Related MCQs

• Samuel Crompton removed the defects of the Spinning Jenny and Water Frame, with his machine known as ……………..
• ……………..removed the defects of the Spinning Jenny and Water Frame, with his machine known as ’Spinning Mule’( 1778) .
• In the 13th century, ……………..laid the foundations of modern science, by insisting on the experimental method, and discovered the uses of gunpowder and the magnifying lens.
• In 1519 ………….discovered Mexico.
• After ruling France from 1792 to 1795, the National Convention was dissolved and the new constitution came to be called the Constitution of the Year ……………
• In 1295, King Edward attempted to curb the nobles and the clergy, by securing the support of the third estate, consisting of the common people. To do so, he summoned the first complete English Parliament including representatives from all sections of society. This meeting came to be referred to as the……………..
• ……………in his ‘The Prince’ projected the need of an absolute king because he alone could provide security to people.
• The ’reign of terror’ came to an end with the revolt of the Parisian mob against Robespierre who was guillotined on March 13, ………….
• In 1769, ……………invented a machine run by waterpower instead of manpower. Hence it came to be called the ’Water-Frame’.
• ……………means "leave to do, leave to pass" or more accurately "let things alone, let them pass".