Single Choice

Which of the following statement are true for pure substances? (i) Pure substances contain only one kind of particles. (ii) Pure substances may be compounds or mixtures. (iii) Pure substances have the same composition throughout. (iv) Pure Substances can be exemplified by all elements other than nickel.

A(i) and (ii)
B(i) and (iii)
Correct Answer
C(iii) and (iv)
D(ii) and (iii)

Solution

Pure substances contain only one kind of particle and have the same composition throughout. Hence statements (i) and (iii) are true.
Pure substances may be elements or compounds. Mixtures are not pure substances, hence option (ii) is False.
Pure substances can be exemplified by all elements, including nickel. Hence option (iv) is false.
Therefore, option B is the correct answer for this question.

SIMILAR QUESTIONS

Matter in Our Surroundings

Which of the following materials fall in the category of a pure substance? (a) Ice (b) Milk (c) Iron (d) Hydrochloric acid (e) Calcium oxide (f) Mercury (g) Brick (h) Wood (i) Air.

Matter in Our Surroundings

Why do we need to separate different components of a mixture? Give two examples.

Matter in Our Surroundings

Which of the following materials fall in the category of a "pure substance"?

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Give two characteristics each of: (a) Pure substances (b) Mixtures

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What are the two types of pure substances? Give one example of each type.

Matter in Our Surroundings

Which of the following are 'Pure substances'? Ice, Milk, Iron, Hydrochloric acid, Calcium oxide, Mercury, Brick, Wood, Air

Matter in Our Surroundings

Define a pure substance. How many types of pure substances do you know?

Matter in Our Surroundings

Which of the following options is correct for the given statement: All pure substances have 1. the same physical state 2. the same colour 3. the same composition 4. a definite set of properties

Matter in Our Surroundings

Complete the statement - an element is a pure substance made up of (identical/different) atoms.

Matter in Our Surroundings

A ________ substance has only one kind of matter.

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