Class 7 Physical and Chemical Changes
Authored by Neha Sikdar
Chemistry, Science, Physics
6th - 7th Grade
NGSS covered
Used 3K+ times
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10 questions
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1.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Which of the following is a physical change?
Rusting of iron
Melting of wax
Combustion of magnesium ribbon
Burning of candle
Tags
NGSS.MS-PS1-4
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is a chemical change?
Cooking of vegetables
Crumpling of paper
Cutting of fruits
Boiling of water
Tags
NGSS.MS-PS1-2
NGSS.MS-LS1-7
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A chemical change may involve
Change in color only
Change in temperature only
Evolution of gas only
Any or all of the above
Tags
NGSS.MS-PS1-2
4.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
Conversion of milk to curd involves (choose all that applies)
Change in color
Change in taste
Milk changes from liquid to semi-solid
Irreversible change
Tags
NGSS.MS-PS1-2
NGSS.MS-LS1-7
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following processes is used to prevent articles from rusting?
Crystallization
Galvanization
Evaporation
Electolysis
6.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
When ice is heated, it changes to water and water on further heating gets converted to steam. What happens when steam is condensed?
A new substance is formed
No new substance is formed
Gaseous phase changes to liquid phase
Color Changes
Tags
NGSS.MS-PS1-4
7.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
Which of the following will be observed if an apple slice is left exposed to air?
It under goes oxidation and become brown in colour
Appearance of brown colour on the surface of apple slice is caused by a chemical reaction between air and enzymes
It dries up
None of the options apply
Tags
NGSS.MS-PS1-2
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