General Awareness · Science General

Inventors and Scientific Discoveries

4,616 Questions

This hub provides questions related to great inventors and their scientific discoveries. It covers the inventors of the telephone, radio, and microchips, alongside Nobel Prize winners. These facts are crucial for the general awareness section of major competitive exams.

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Inventors and Scientific Discoveries Questions

Multiple choice

Boolean logic was developed by

  1. George Boole

  2. Henry Boole

  3. Richard Boole

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Boolean logic is named after George Boole, the 19th-century mathematician who introduced it in his work, 'The Laws of Thought'.

Multiple choice

Law of octaves was given by

  1. Johann Dobereiner

  2. Dmitri Mendeleev

  3. John Alexander Newlands

  4. Lothar Meyer
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

John Alexander Newlands in 1865 profounded the Law of Octaves. He arranged the elements in increasing order of their atomic weights and noted that every eighth element had properties similar to the first element .The relationship was just like every eighth note that resembles the first in octaves of music.

Multiple choice

Modern periodic table was given by

  1. Dobereiner

  2. Moseley

  3. John Newland

  4. Dmitri Mendeleev
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The few defects in Mendeleev's periodic table were corrected by Moseley, and thus was formed the modern periodic table, based on the modern periodic law. Moseley changed the basis of arrangement of elements in Mendeleev's periodic table from atomic mass to atomic number and noticed that all defects of the periodic table were cleared by this change.

Multiple choice

Which of the following scientists gave the 'Law of Octaves'?

  1. Lavoisier

  2. Dobereiner

  3. Newland

  4. Dalton
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

John Newlands proposed the Law of Octaves in 1864, which stated that when elements are arranged in order of increasing atomic masses, every eighth element has similar properties to the first element, analogous to musical octaves where every eighth note has similar sound.

Multiple choice

Directions: The short passage below is followed by a question based on its content. Answer the question on the basis of what is stated or implied in the passage. Thomas Alva Edison lit up the world with his invention of the electric light. Without him, the world might still be a dark place. However, the electric light was not his only invention. He also invented the phonograph, the motion picture camera, and over 1,200 other things. About every two weeks he created something new. When he was 12 years old, he got his first job. He became a newsboy on a train that ran between Port Huron and Detroit. He set up a laboratory in a baggage care of the train so that he could continue his experiments in his spare time. Unfortunately, his first work experience did not end well. Thomas was fired when he accidentally set fire to the floor of the baggage car. Thomas then worked for five years as a telegraph operator, but he continued to spend much of his time on the job conducting experiments. He got his first patent in 1868 for a vote recorder run by electricity. However, the vote recorder was not a success. In 1870, he sold another invention, a stock-ticker, for $40,000. Thomas Edison was totally deaf in one ear and hard of hearing in the other, but thought of his deafness as a blessing in many ways. It kept conversations short, so that he could have more time for work. He called himself a “two-shift man” because he worked 16 out of every 24 hours.

What is the theme of the passage?

  1. Thomas Edison was always interested in science and inventions, which gave him the inspiration to invent many important things.

  2. Thomas Edison could not keep a job.

  3. Thomas Edison worked day and night on his experiments.

  4. Deaf people make good inventors because they can focus without the distraction of spoken conversation.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Option (1) could easily be used as a thesis statement for the passage. The passage focuses on Edison's continued interest in science and inventions, and on how his inventions helped the world. Hence, (1) is the answer.

Multiple choice

Who discovered Java ape-man?

  1. Black

  2. Dubois

  3. Cuvier

  4. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Eugene Dubois discovered the Java ape-man (Pithecanthropus erectus, now Homo erectus) in Indonesia in 1891.

Multiple choice

Logarithms were invented by -------------

  1. Newton

  2. Pascal

  3. John Napier

  4. Galileo
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

John Napier, a Scottish mathematician, is credited with the invention of logarithms in the early 17th century.

Multiple choice

Who developed Boolen Algebra?

  1. Lady Eda

  2. George Boole

  3. F.W. Jordan

  4. John Napier
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

George Boole was an English mathematician who invented Boolean algebra, which is the basis for modern digital logic.

Multiple choice

Who developed BASIC language?

  1. John Kenedy

  2. John Kemeny

  3. John Carious

  4. None
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

BASIC (Beginner's All-purpose Symbolic Instruction Code) was developed by John G. Kemeny and Thomas E. Kurtz at Dartmouth College in 1964.