The theory of Evolution was produced by
Answer: D
Charles Darwin produced it.
On the Origin of Species appeared in 1859, proposing that species change through natural selection acting on inherited variation. Alfred Russel Wallace reached the same conclusion independently, which is what prompted Darwin to publish.
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By which country was Atomic bomb was first successfully developed
Answer: A
The United States developed it.
The Manhattan Project tested the first device at Alamogordo on 16 July 1945, and bombs were dropped on Hiroshima and Nagasaki the following month. The Soviet Union followed in 1949, Britain in 1952, France in 1960, China in 1964 and India in 1974.
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Which app to locate board examination centres for students was launched by which body?
Answer: A
It was launched by the CBSE.
The Central Board of Secondary Education released an app to let candidates find their examination centre by entering their roll number, showing the route and distance.
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Which item, originally called the Whirlwind, was invented by Ives McGaffey in 1869?
Answer: D
It was the vacuum cleaner.
Ives McGaffey patented his hand-cranked Whirlwind in 1869. It was hard to work - one hand turned the crank while the other pushed - and few were sold; the powered version came from Hubert Booth in 1901.
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Cinematography was invented by
Answer: B
Thomas Edison is credited with it.
His laboratory built the kinetograph camera and the kinetoscope viewer between 1889 and 1892, though W.K.L. Dickson did most of the work. The Lumiere brothers' cinematograph of 1895 first projected film to an audience.
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When was the Raggedy Ann doll patented?
Answer: A
The Raggedy Ann doll was patented in 1915.
Johnny Gruelle, a cartoonist, patented the rag doll with red yarn hair and named it after two poems by James Whitcomb Riley. The stories about her followed in 1918.
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Galileo was an Italian astronomer who
Answer: D
All of these.
Galileo found that a pendulum's period does not depend on the size of its swing; discovered the four large moons of Jupiter in 1610, which showed not everything orbits the earth; and improved the telescope to twenty times magnification for astronomical use.
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Which famous inventor ranks second in the number of patents registered?
Answer: A
Edwin Land ranks second.
The inventor of the Polaroid camera held 535 United States patents. Edison holds 1,093, the most of any individual American inventor.
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Gun powder was invented in 9th century in
Answer: B
It was invented in Tang dynasty China.
Alchemists searching for an elixir of immortality recorded in the ninth century that saltpetre, sulphur and charcoal burned fiercely together, warning that it could singe beards and burn down houses. It was used in warfare from the Song period.
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The steam engine was invented by
Answer: A
James Watt is credited with it.
Newcomen's engine already existed; Watt's separate condenser of 1765 cut its fuel consumption by three-quarters, and his rotary motion took steam from pumping water out of mines into driving machinery.
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