Question

2. Explain with example.
a)Mixture
b)Pure Substance
c) Element
d) Suspension
Please answer. ​

Answer 1

Answer:

a) Mixture - A Mixture is a substance made by combining two or more different material in such a way that no chemical reaction occur.A mixture can usually be separated back into its original component.Some example - mixture are a tossed salad,salt water.

b) Pure substance - the substances that are free from any kind of mixture and contain only one kind of particles are pure substance . Examples are iron,silver and gold

c) Element - A substance that cannot be decomposed into simpler substances by chemical means, and is made up of atoms all with an identical number of protons.Examples of elements include iron, oxygen, hydrogen, gold, and helium. An important number in an element is the atomic number.

d) Suspension -A suspension is a heterogeneous mixture in which the small particles of a solid are spread throughout a liquid without dissolving it. The chalk powder in water, muddy water, wheat flour in water etc. sand in water are all examples of a suspension

Answer 2

Answer:

b. Pure substances are substances that are made up of only one kind of particles and has a fixed or constant structure.Example All elements are pure except few like gold, copper, oxygen etc.

b. A suspension is a heterogeneous mixture in which the small particles of solids or solute are spread through out a liquid without dissolving in it. Example Mixture of chalk and water.

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