Physical and Chemical Changes
Physical and Chemical Changes: Overview
This topic explains the difference between physical and chemical changes of a matter. Chemical characteristics of oil and water are described here. An example of burning is also illustrated to explain the concept.
Important Questions on Physical and Chemical Changes
_____is the process of movement of molecules under a concentration gradient.
Small dust particles or smoke_____ into the air and cause air pollution.
Diffusion is an important process occurring in all living beings.
Diffusion is a physical change or chemical change. Explain.
Cooking of rice is a physical change.
Define the following term
Burning.
A chemical change is irreversible in nature.
7g of iron filings and 4g of sulfur powder is heated strongly with dilute H2SO4. Which gas would be produced?
7g of iron filings and 4g of sulphur powder is treated with dilute H2SO4 at room temperature. Name the gas produced.
Which of the following characteristics belong to a chemical reaction?
What type of change is observed during a neutralisation reaction?
What type of light is produced when a magnesium ribbon is burnt in a candle flame?
The burning of any substance is a:
The expansion and contraction of metals observed after heating and cooling them is a
The turning of lime water into milky is a standard test for
Which of the following process is an example of both physical and chemical change?
Which of the following change can be called as a chemical change?
A change in which a new substance with different properties is formed is known as the _____ change.
