Pure Substances
Trending Questions
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State four physical properties of pure water.
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On the basis of composition, how is matter classified? [1 MARK]
Q. The definition for pure substances is that they consist of only one type of atoms or molecules then why is it that water even though it has two elements, i.e. , hydrogen and oxygen is called a pure substance
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What are pure substances?
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What do you mean by an element?
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What do you mean by an element?
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2. Define the following with an example for each:
(a) Pure Substance
Q. Which of the following statements are true for pure substances?
(i) Pure substances contain only one kind of particle.
(ii) Pure substances may be compound or mixture.
(iii) Pure substances have the same composition throughout.
(iv) Pure substances can be exemplified by all elements other than nickel.
(i) Pure substances contain only one kind of particle.
(ii) Pure substances may be compound or mixture.
(iii) Pure substances have the same composition throughout.
(iv) Pure substances can be exemplified by all elements other than nickel.
- (i) and (ii)
- (i) and (iii)
- (iii) and (iv)
- (ii) and (iii)
Q.
Which of the following is not a characteristic feature of a pure substance?
- It is perfectly homogeneous
- A substance contains different types of atoms or molecules
- It have a definite composition which does not change with them
- It has definite melting point, boiling point, density etc.
Q. State three properties of mixtures.
Q. <!--td {border: 1px solid #cccccc;}br {mso-data-placement:same-cell;}-->
How are elements different from compounds? State 3
properties of compounds.
properties of compounds.
Q.
Matter with definite and constant composition, and distinct chemical properties is known as:
mixture
pure substance
impure substance
element
