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प्रश्न
Select the correct answer to the statement given below:
A compound containing carbon, oxygen and calcium.
पर्याय
Chalk
Oxygen
Silicon
Bromine
Nitrous oxide
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उत्तर
Chalk
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संबंधित प्रश्न
Tick the most appropriate answer
Solutions are
- heterogeneous mixtures.
- compounds
- homogeneous mixtures.
- elements
Write true or false
A heterogeneous mixture has a uniform composition throughout the mixture
Give the symbols of: Carbon, calcium, copper, chlorine, cobalt, argon.
Define Elements.
How is sodium chloride different from its constituent elements, sodium and chlorine in its properties? Justify.
What is meant by 2H and H2
State the number of atoms of H2SO4
Name: A form of carbon used as a gem
Find the atomicity of the Following molecule:
Aluminium Suiphide
Fill in the blank
A liquid non-metal is _______.
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 non-metal which is a good conductor of electricity.
Select the correct answer from the choice given below.
A group of atoms of elements
Select the correct answer from A, B, C, D & E for the statement given below :
A diatomic molecule.
Select the correct answer from the choice given below to complete the sentence :
Dust in air is an example of _________ mixture.
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?
Non-metals are usually poor conductors of heat and electricity. They are non-lustrous, non-sonorous, non-malleable and are coloured.
Name a non-metal other than carbon that shows allotropy.
Classify the substances given in Fig. 2.2 into elements and compounds
Name the two elements which are derived from the country.
