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.
A ________ substance has only one kind of matter.
Answer: A
pure
_
substance has only one kind of matter.
When we speak of a pure substance, we are speaking of something that contains only one kind of matter. This can either be one single element or one single compound, but every sample of this substance that you examine must contain exactly the same matter with a fixed, definite set of properties.
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.
Why do we need to separate different components of a mixture? Give two examples.
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.
Which of the following materials fall in the category of a "pure substance"?
Give two characteristics each of: (a) Pure substances (b) Mixtures
What are the two types of pure substances? Give one example of each type.
Which of the following are 'Pure substances'? Ice, Milk, Iron, Hydrochloric acid, Calcium oxide, Mercury, Brick, Wood, Air
Define a pure substance. How many types of pure substances do you know?
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
Complete the statement - an element is a pure substance made up of (identical/different) atoms.