Comparison between physical and chemical changes - class-VII
Description: comparison between physical and chemical changes | |
Number of Questions: 30 | |
Created by: Avatara Chahal | |
Tags: chemistry physical and chemical changes chemical reactions and their types is matter around us pure chemical reaction chemical changes chemical reactions phenomena around us change around us |
Identify the physical change:
Which of the following represents a physical change?
Which of the following is/are true?
Which of the following represents a chemical change?
In which type of change, alteration takes place only in specific property of matter but not composition?
Which of the following is not a physical change?
On heating, the colour of zinc oxide changes from white to yellow. This is a/an:
In a certain change, colour and the magnetic properties of a substance changed. What reaction might this be?
In the_______ properties of molecules remain same even after the change.
Choose the incorrect statement :
Changes are of _________ kinds.
Physical changes require _______ energy than chemical changes.
Dissolving sugar in water is a chemical change. True or false?
What property stays the same during physical and chemical changes?
Which of the following is an example of chemical change?
What characteristic best describes what happen during a physical change?
Common chemical changes are :
Heating of ammonium chloride solution is a:
Burning of candle is a :
Which of the following is a physical change?
The difference between a physical reaction and a chemical reaction is :
Physical change include change in :
All of the following involve a chemical change at a particular temperature except :
Which statement best describes the difference between the two equations shown below?
Equation I: $H _{2}O _{(l)} \rightarrow H _{2}O _{(g)}$
Equation II: $2H _{2}O _{(l)} \rightarrow 2H _{2(g)} + O _{2(g)}$
All of the following could represent a physical process except:
When carbon dioxide is passed through lime water, it turns milky due to the formation of
Which of the following processes involves a chemical change?
If pressure is applied to the equilibrium system of solid $ \rightleftharpoons $ liquid, the melting point of the liquid:
Water on cooling to zero degrees becomes ice. The main reason for this conversion is the hydrogen bonding. Which one of the following statements is correct?