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⁞ Chemistry

General Science ➤ Chemistry ➤ 1
Question 1
Q1.  The branch of medicine involving synthetic chemical compounds is
 

Answer :  Allopathy


Allopathy which is the most widely followed system uses laboratory synthetic chemical composition as drugs. It refers to mainstream medical use of pharmacologically active agents or physical interventions to treat or suppress symptoms or pathophysiologic processes of diseases or conditions.
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Question 2
Q2.  Hydrogen was discovered by
 

Answer :  Cavendish


In 1766, Henry Cavendish was the first to recognize hydrogen gas as a discrete substance, by naming the gas from a metal-acid reaction "flammable air".
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Question 3
Q3.  Light scattering takes place in ___________ ?
 

Answer :  Colloidal solutions


Light scattering in colloidal solutions or particles in suspension is known as Tyndall Effect. It is similar to Rayleigh scattering, in that the intensity of the scattered light depends on the fourth power of the frequency, so blue light is scattered much more strongly than red light.
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Question 4
Q4.  An element of atomic no. 29 belongs to __________ .
 

Answer :  d - block


Copper (Cu) has the atomic number of 29. Copper belongs to the d-block which is the collective name for Groups 3 to 12 in the periodic table. Most of the d-block elements are considered to be metals, with a common lustrous metallic appearance.
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Question 5
Q5.  A compound used in medicine as a pain killer is _________ .
 

Answer :  Aspirin


Compound analgesics (pain killers) are made from two different drugs combined in one tablet. The drugs used typically include Paracetamol, aspirin, codeine or dihydrochloride. Aspirin is used to treat mild to moderate pain and to reduce fever or inflammation.
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