Physical and Chemical Changes
Physical and Chemical Changes: Overview
This topic covers concepts such as Change of Colour Indicating Chemical Changes, Physical Changes, Chemical Changes, Physical Properties, Shape as a Physical Property, Size as a Physical Property, Colour as a Physical Property, etc.
Important Questions on Physical and Chemical Changes
Which of the following is required to make any changes in the states of matter?
Energy is required to bring about any changes(physical or chemical).
"Energy is required to bring about any changes", is it true? Explain with examples.
Give one example for a change in a substance’s colour during a chemical reaction.
There is no change in weight during physical change.
Physical changes are permanent and cannot be reversed.
During a physical change, _____ properties of the matter remains the same.
Sublimation of camphor is a physical or chemical change. Explain.
Cooking of rice is a physical change.
Which of the following is a physical change?
When lime juice reacts with baking soda, it releases carbon dioxide gas.
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?
