Question : Which of the following was invented by Sir Humphry Davy?
Option 1: Safety pin
Option 2: Steam engine
Option 3: Safety lamp
Option 4: X-rays
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Correct Answer: Safety lamp
Solution : The correct option is the Safety lamp.
Chemist Sir Humphry Davy was from England. He made several chemical discoveries, such as the mining safety lamp, by enclosing the flame in a wire mesh or glass enclosure to limit the risk of igniting flammable gases. He also discovered elements like sodium, potassium, calcium, and barium.
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Question : What was invented by Zacharias Jansen?
Option 1: Jet engine
Option 2: Radium
Option 3: Microscope
Option 4: Electric lamp
Question : Ozone protects biosphere from:
Option 1: X -rays
Option 2: Gamma rays
Option 3: Ultraviolet rays
Option 4: Infrared rays
Question : Thymine dimer formation in DNA is caused by
Option 1: IR-rays
Option 2: X-rays
Option 3: b and g-rays
Option 4: UV-rays
Question : Who discovered Photon?
Option 1: George Crum
Option 2: Albert Einstein
Option 3: Henry Cavendish
Option 4: Humphry Davy
Question : Who discovered Potassium?
Option 1: Humphry Davy
Option 2: Alan Turing
Option 3: Bill Gates
Option 4: Tim Berners-Lee
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