Nature of Matter Elements Compounds and Mixtures Class 8 Fill in the Blanks
hardNature of Matter Elements Compounds and Mixtures Class 8 Fill in the Blanks
Nature of Matter Elements Compounds and Mixtures Class 8 Fill in the Blanks
Question 1.
A ............ is a pure substance that cannot be broken down into simpler substances by chemical means.
Answer:
element
Question 2.
Substances composed of two or more elements combined chemically in a fixed ratio are known as .............
Answer:
compounds
Question 3.
A ............ consists of two or more substances mixed together, where the individual components retain their properties and do not react chemically.
Answer:
mixture
Question 4.
In a ............ mixture, the different components are not uniformly distributed and can often be seen separately.
Answer:
non-uniform
Question 5.
The individual substances that make up a mixture are called its .............
Answer:
components
Nature of Matter Elements Compounds and Mixtures Class 8 True or False
Question 1.
All elements are pure substances.
Answer:
True
Question 2.
A compound can be separated into its constituent elements by physical means.
Answer:
False
Question 3.
Mixtures retain the properties of their individual components.
Answer:
True
Question 4.
Water is a mixture of hydrogen and oxygen.
Answer:
False
Nature of Matter Elements Compounds and Mixtures Class 8 Match the Following
Question 1.
Match the items of Column A with those given in Column B.
| Column A (Substance) | Column B (Example) |
| (i) Element | (a) Water H2O) |
| (ii) Compound | (b) Air |
| (iii) Mixture | (c) Gold (Au) |
| (iv) Pure substance | (d) Salt (NaCl) |
Answer:
| Column A (Substance) | Column B (Example) |
| (i) Element | (c) Gold (Au) |
| (ii) Compound | (a) Water (H2O) |
| (iii) Mixture | (b) Air |
| (iv) Pure substance | (d) Salt (NaCl) |
Question 2.
Match the items of Column A with those given in Column B.
| Column A | Column B |
| (i) Non-uniform mixture | (a) Seawater |
| (ii) Uniform mixture | (b) Sand and Water |
| (iii) Element | (c) Oxygen O2 |
| (iv) Compound | (d) Iron Oxide (Fe2O3) |
Answer:
| Column A | Column B |
| (i) Non-uniform mixture | (b) Sand and Water |
| (ii) Uniform mixture | (a) Seawater |
| (iii) Element | (c) Oxygen O2 |
| (iv) Compound | (d) Iron Oxide (Fe2O3) |
Question 3.
Match the items of Column A with those given in Column B.
| Column A | Column B |
| (i) Iron | (a) CO2 |
| (ii) Magnesium oxide | (b) MgO |
| (iii) Mixture | (c) Rust (Fe2O3) |
| (iv) Carbon dioxide | (d) Air |
Answer:
| Column A | Column B |
| (i) Iron | (c) Rust (Fe2O3) |
| (ii) Magnesium oxide | (b) MgO |
| (iii) Mixture | (d) Air |
| (iv) Carbon dioxide | (a) CO2 |