Question 1

D.D.T. was invented by

Accepted Answer

Swiss chemist Paul Hermann Muller discovered DDT (dichloro-diphenyl-trichloroethane) noted its effectiveness as a pesticide during World War II to control malaria and typhus among civilians and troops, a discovery that earned him a Nobel Prize in 1948. It was first synthesized in the year 1874.

Question 2

This statesman,politican,scholar,inventor,and one of early presidents of USA invented the swivel chair,the spherical sundial,the moldboard plow,and the cipher wheel.

Accepted Answer

Thomas Jefferson (April 13, 1743 – July 4, 1826) was the third President of the United States (1801-1809) and the principal author of the Declaration of Independence (1776).

Question 3

Revolver discovered by

Accepted Answer

Colt

Question 4

In the 1700s,who would pay the postage fee for letters before the stamp was invented?

Accepted Answer

Later in 1840, Rowland Hill invented the stamp, which was paid for by the sender, not the receiver.

Question 5

The most important feature of the Indian Parliament is that:

Accepted Answer

it also comprises of the president

Question 6

Cinematography was invented by

Accepted Answer

Edison

Question 7

Who invented Radar?

Accepted Answer

Robert Watson Watt

Question 8

In which decade was the Internet first implemented?

Accepted Answer

1960s

Question 9

What J. B. Dunlop invented?

Accepted Answer

Pneumatic rubber tire

Question 10

App to locate board exam centre for students launched by ?

Accepted Answer

CBSE

Question 11

Who invented waterproof fabrics ?

Accepted Answer

Charles Macintosh (29 December 1766 – 25 July 1843) was a Scottish chemist and inventor of waterproof fabrics.He devoted all his spare time to science, particularly chemistry, and before he was twenty resigned his clerkship to take up the manufacture of chemicals. In this he was highly successful, inventing various new processes. His experiments with one of the by-products of tar, naphtha, led to his invention of waterproof fabrics.

Question 12

Bushwell invented

Accepted Answer

Submarine

Question 13

The first hand glider was designed by…?

Accepted Answer

Leonardo DaVinci

Question 14

The first effective vaccine against polio was prepared by ?

Accepted Answer

Jonas E Salk

Question 15

Who Discovered The Nucleus of a Cell?

Accepted Answer

Robert Brown, Scottish botanist, Discovered The Nucleus of a Cell in 1831, London. When Brown was studying orchids under microscope when he observed an opaque area, which he called the "Areola" or "Nucleus", in the cells of the flower's outer layer. The nucleus was also described by Franz Bauer in 1804 but in detail Robert Brown made it in 1831.

Question 16

Who invented Electric Generator?

Accepted Answer

Michael Faraday invented Electric Generator in 1831. The operating principle of electromagnetic generators was discovered in the years of 1831–1832 by Michael Faraday. The principle later called Faraday's law, is that an electromotive force is generated in an electrical conductor which encircles a varying magnetic flux.

Question 17

When was Barb Wire patented

Accepted Answer

Joseph F. Glidden - Father of Barbed Wire. Glidden was born in New York in 1812. He invented Barbed Wire in 1873 and was granted the patent on Nov. 24, 1874. After a three year battle over the patent, which he eventually won received a patent for the modern invention in 1874 after he made his own modifications to previous versions.

Question 18

Simpson and Harrison are associated with the invention of

Accepted Answer

Chloroform

Question 19

Who invented fuel cells in 1839?

Accepted Answer

Sir William Grove

Inventions Questions