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प्रश्न
Fill in the blank
Chalk powder dissolved in water is an example of a Chalk powder dissolved in water is an example of a _________.
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उत्तर
Chalk powder dissolved in water is an example of a Chalk powder dissolved in water is an example of a suspension.
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संबंधित प्रश्न
Name the technique that you use if only the solid component of a solution is required.
Name: a Non-metal Which is a Good Conductor of Electricity.
Give two examples of Metals.
Give two examples of Noble gases.
Give two examples of the following.
Non-metals which are solids
Mention three gaseous elements and write their molecular formulae
Tick (√) the correct alternative from the choice given for the following statement.
The most abundant elements in the universe are
Tick (√) the correct alternative from the choice given for the following statement
A non-metal which is a good conductor of electricity.
Match the statements in List I – 1 to 10 correct answers in List II-A to J.
| List I | LIst II | ||
| 1 | Fluorine and chlorine | A | Nitrogen |
| 2 | A diatomic molecule | B | Boron |
| 3 | A molecule containing the elements hydrogen and oxygen. | C | Reactants |
| 4 | A metalloid - showing properties of both metals and non-metals. | D | Chemical Formula |
| 5 | The term used for the substances which take part in the chemical reaction | E | Halogens |
| 6 | The term represents a substance by means of symbols. | F | Water |
| 7 | The term used for the substances formed as a result of a chemical reaction | G | Nitric Acid |
| 8 | A compound containing one atom of zinc and two atoms of chlorine. | H | Products |
| 9 | The chemical name for nitrogen monoxide. | I | Phosphorus |
| 10 | A polyatomic molecule. | J | Zinc Chloride |
Select the correct answer from the choice given below.
An impure substance
Write the names of elements from the following symbol:
Si
Define the term ‘compound’. In the compound carbon dioxide – the elements carbon & oxygen are combined in a fixed ratio. Explain.
State five different characteristics of compounds.
Elements are made up of______ kinds of atoms.
Assertion: Air is a mixture of elements only.
Reason: Only nitrogen, oxygen and neon gases exist in air.
Why are utensils made up of aluminium and brass?
Name the constituents of water.
Reason out
Elements are called semimetals.
Give the chemical formula for cane sugar.
