1.

P changes into Q on heating. On further heating Q changes into R. Select the option that correctly compares the properties of P, Q and R.           

A. P Q R  Has fixed shape Has fixed shape Has no fixed shape                            
B.        P Q R  Has fixed volume Has fixed volume     Has no fixed volume                
C.        P Q R  Has fixed mass Has no fixed mass    Has no fixed mass                
D.        P Q R  Has fixed colour         Has no fixed colour   Has fixed colour
Answer» C.        P Q R  Has fixed mass Has no fixed mass    Has no fixed mass                


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