CBSE Class 7 Science Physical and chemical changes MCQs

CBSE Class 7 Science Physical and chemical changes MCQs. Revision worksheets, Sample papers, Question banks and easy to learn study notes for all classes and subjects based on CBSE and NCERT guidelines. Students and parents can download free a collection of all study material issued by various best schools in India. The study material has been carefully compiled by the best teachers in India. The students should practice the questions database to get better marks in examination.  Based on the same pattern as released by CBSE every year. Study material for final/ term/ SA1/ SA2 Examinations conducted by various schools affiliated to Central Board of Secondary Education (CBSE) in India and abroad. CBSE Study material has been compiled to help students preparation which will helps the students to concentrate more in areas which carry more marks.

Physical and Chemical changes

1.  A change in which a substance undergoes changes in its physical properties is called ( )

a.  Chemical change  b.   physical change c.  No change  d.  Biological change

2.  When carbon dioxide is passed through lime water , then lime water becomes ( )

a.  milky  b.  shiney  c.   silvery  d.  Golden yellow

3.   Brown colour of the apple  after cutting is ( )

a.  physical change  b.  chemical change c.   no change  d.   biological change

4.  Ozone layer protects us from harmful ( )

a.  Ultraviolet radiation  b.   Infrared Radiation 

c.  Visible Radiation  d.   Heat radiation

5.  The process of depositing a layer of one metal over another metal surface to protect it from rusting is called ( )

a.  Galvanisation  b.  Crystallisation

c.  amalgamating d.   Neutralisation

6.  For protecting iron pipes from corrosion, they are coated with ( )

a.  Zinc b.  Copper  c.  Aluminium  d.   Silver

7.   Metal that is made by mixing iron with carbon, nickel and manganese is called ( 

a.  Stainless steel  b.   German silver c.  Nichrome  d.  Eureka 

8.   The process of obtaining Salt by the evaporation of sea water is called ( )

a.  Crystallisation  b.   Neutralisation

c.  Galvanisation d.   Amalgamation

9.   Blue colour of the copper sulphate solution changes to Green colour when an iron nail is dropped into it due to the formation of ( )

a.   Iron sulphate  b.  copper chloride c.  Copper iron sulphate  d.   Iron chloride

10. When Magnesium ribbon is burnt in oxygen, the product obtained is ( )

a.  Magnesium chloride  b.  Magnesium sulphate 

c.   Magnesium oxide  d.  Iron chloride

11. Magnesium hydroxide, obtained when Magnesium oxide is dissolved in water, is ( 

a.  a Base  b.  An acid c.   an indicator  d.   a dissolving agent

12. When Magnesium ribbon is burnt in candle flame it burns with ( )

a.  brilliant red light  b.  Brilliant yellow light

c.  Brilliant white light d.   Brilliant Green light

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