Single Choice

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

AIce, milk and iron
B$$CaO,CO_2$$ and $$NaCl$$
Correct Answer
CBrick, mercury and wood
D$$\text{Iron}, CaO \text{ and Air}$$

Solution

Pure substances are those in which all the constituent particles present in them are the same and identical in chemical nature.
Elements and compounds are examples of pure substances.
$$CaO, CO2, NaCl$$ are examples of compounds.
Air, milk. brick and wood fall under impure substances.

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 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.

Matter in Our Surroundings

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

Matter in Our Surroundings

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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