Question of Exercise 2

Chemical effect of electric current of Class 8

Which of the following statement(s) is (are) true?


Option 1 Melting and boiling points of a pure substance are the important physical characteristics

Option 2 Melting and boiling points are used to find whether a substance is pure or not

Option 3 No two pure substances have same melting point and boiling point.

Option 4 All  

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