Pure Substance - MCQs with Answers

Q1. What is a pure substance?

a. a homogeneous mixture of two substances of same composition
b. a substance with constant chemical composition throughout its mass
c. both a. and b.
d. none of the above

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Q2. A pure substance exists in

a. solid phase
b. liquid phase
c. gaseous phase
d. all of the above

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Q3. Which in the examples is NOT a pure substance?

a. baking soda
b. diamond
c. sea water
d. table salt

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