1.

Which of the following statement is/are correct? (i) An element of a substance contains only one kind of atoms. (ii) In CO_2, carbon and oxygen chemically combined in a fixed proportion of 3 : 8 by mass. (iii) The constituents of the pure substances can be separated by single physical methods. (iv) Milk is a homogeneous mixture.

Answer»

(i) and (II)
(i) , (III) and (IV)
Only (i)
(i) , (ii) , (iii) and (iv)

ANSWER :A


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