Advertisements
Advertisements
Question
Give a reason for the following statement:
Components in a mixture are present in varying proportions and not in a fixed proportion.
Advertisements
Solution
A mixture is an impure substance containing more than one element or compound, mechanically mixed together in any proportion and the mixture retains the properties of its constituents i.e. elements or compounds.
APPEARS IN
RELATED QUESTIONS
Give one example for the following type of mixtures
solid-solid homogenous mixture.
Define the term: Element
Give Two Examples for Each of the Following: Inert Gases
Name: an Inert Gas
Classify the following substances into elements and compounds
Mercury, sulphur, sugar, water, sand, gold, carbon, oxygen, alcohol, iron, marble, baking soda.
Match the Columns:
| Column A | Column B | ||
| (a) | Metals | (i) | Non-Reactive |
| (b) | Molecules | (ii) | Brittle |
| (c) | Non-Metals | (iii) | Lustrous |
| (d) | Noble Gases | (iv) | Smallest unit of Compound |
Tick (√) the correct alternative from the choice given for the following statement
A metal which is brittle
Classify substances into pure and impure substances in the form of a chart or tabulation.
Select the correct answer from the choice given below.
An impure substance
Who are my companions?
| Group 'A' | Group 'B' |
| 1. Stainless steel | (a) Non-metal |
| 2. Silver | (b) compound |
| 3. Bhajani mixture for milling | (c) Mixture |
| 4. Salt | (d) Element |
| 5. Coal | (e) Alloy |
| 6. Hydrogen | (f) Metal |
Write the names of elements from the following symbol:
Xe
Represent with the help of a simple chart how matter is classified into pure or impure substances & further into elements, compounds & mixtures, with elements further segmented.
Differentiate between homogenous & heterogeneous mixtures.
Give an example for the elements derived from their Latin names.
Differentiate metals and non-metals.
Match the following.
| 1. | Element | Made up of molecules |
| 2. | Compound | Impure substance |
| 3. | Colloid | Settles down on standing |
| 4. | Suspension | Pure substance |
| 5. | Mixture | Made up of atoms |
Oxygen is very essential for us to live. It forms 21% of air by volume. Is it an element or compound?
Give two example of elements.
Give an example of each mixture having the following characteristics. Suggest a suitable method to separate the components of this mixture
Two or more coloured constituents are soluble in some solvent.
Name the element which is used for making computer chips.
