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प्रश्न
Give the reason why the following is considered as chemical changes.
Sulphur when burnt in air evolves a gaseous acidic product.
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उत्तर
Is a chemical change as sulphur (yellowish-green) on burning produces SO2 gas which is acidic in nature and a new substance with new properties is formed
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संबंधित प्रश्न
Fill in the blank
change in which the substance can be brought back to its original state is called a ............... change.
Fill in the blank.
Changes that occur in nature are called ........................
Write short answer.
Sublimation is classified as a physical change. Why ?
Classify the following changes as physical or chemical:- melting of a solid (wax)
Fill in the blank
Chemical change occurs as a result of __________ between two substances.
State whether the following is physical or chemical changes.
cutting wood into small pieces —
What are man-made changes ?
Give the reason why the following is considered as chemical changes.
A piece of magnesium strip is dropped into a beaker containing dilute hydrochloric acid.
Name the following.
The product obtained during a physical change when water converts from a liquid into a solid.
Which of the following is not a physical change?
