GK - Inventions and Discoveries
46.
Insulin was discovered by
Answer
On 11 January 1922 insulin was first used in the treatment of diabetes. The discovery of insulin occurred in 1921 following the ideas of a Canadian orthopedic surgeon named Frederick G. Banting, the chemistry skills of his assistant Charles Best, and John MacLeod of the University of Toronto in Canada.
Answer :
Option CExplanation :
On 11 January 1922 insulin was first used in the treatment of diabetes. The discovery of insulin occurred in 1921 following the ideas of a Canadian orthopedic surgeon named Frederick G. Banting, the chemistry skills of his assistant Charles Best, and John MacLeod of the University of Toronto in Canada.
47.
Who had discovered oxygen?
Answer
Oxygen was isolated by Michael Sendivogius before 1604, but it is commonly believed that the element was discovered independently by Carl Wilhelm Scheele, in Uppsala, in 1773 or earlier, and Joseph Priestley in Wiltshire, in 1774.
Priority is often given for Priestley because his work was published first.
Answer :
Option BExplanation :
Oxygen was isolated by Michael Sendivogius before 1604, but it is commonly believed that the element was discovered independently by Carl Wilhelm Scheele, in Uppsala, in 1773 or earlier, and Joseph Priestley in Wiltshire, in 1774.
Priority is often given for Priestley because his work was published first.
48.
Fax machine was invented by ?
Answer
The first fax machine was invented by Scottish mechanic and inventor Alexander Bain. In 1843, Alexander Bain received a British patent for "improvements in producing and regulating electric currents and improvements in timepieces and in electric printing and signal telegraphs", in laymen's terms a fax machine.
Answer :
Option CExplanation :
The first fax machine was invented by Scottish mechanic and inventor Alexander Bain. In 1843, Alexander Bain received a British patent for "improvements in producing and regulating electric currents and improvements in timepieces and in electric printing and signal telegraphs", in laymen's terms a fax machine.
49.
Thermo Flask was invented by ?
Answer
The vacuum flask (also known as a Dewar flask, Dewar bottle or thermos) was designed and invented by Scottish scientist Sir James Dewar in 1892 as a result of his research in the field of cryogenics and is sometimes called a Dewar flask in his honour.
Answer :
Option AExplanation :
The vacuum flask (also known as a Dewar flask, Dewar bottle or thermos) was designed and invented by Scottish scientist Sir James Dewar in 1892 as a result of his research in the field of cryogenics and is sometimes called a Dewar flask in his honour.
50.
Benjamin Franklin was a prolific inventor. He invented the lightning rod, the Franklin stove, studied electricity, discovered the Gulf Stream, started the first library, and on and on. Among his many other inventions, what musical instrument did he invent?
Answer
Ben also holds a lot of firsts - first U.S. ambassador, first political cartoonist, first American philosopher, organized the first fire department, and on and on.
Answer :
Option DExplanation :
Ben also holds a lot of firsts - first U.S. ambassador, first political cartoonist, first American philosopher, organized the first fire department, and on and on.
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