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प्रश्न
What is chemistry?
उत्तर
“The branch of science that deals with the study of the composition and the physical and chemical properties of various forms of matter is called Chemistry.”
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संबंधित प्रश्न
___________ deals with the study of matter and the changes it undergoes.
Write True or False against the following statement.
Chemistry plays an important role in the national economy:
Choose the correct alternative from the choices given below for the following statement:
Which one of the following is a pesticide?
State the method used for collecting the following gas:
Oxygen – a gas slightly soluble in water.
State the method used for collecting the following gas:
Sulphur dioxide – a gas highly soluble in water and heavier than air
‘Alchemists are older words for Chemists’. Discuss the statement in brief.
Select the correct name from the choices given below for the following case.
A synthetic fiber used in clothing.
Select the correct name from the choices given below for the following case.
A substance which absorbs moisture and keeps the skin dry and free from rashes.
Select the correct apparatus from A, B, or C for the following functions of the apparatus given.
A modern apparatus with an air regulator, used for heating purposes.
Give reasons for the following
Alchemy was considered a pseudoscience.
