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प्रश्न
Select the correct answer to the statement given below:
A compound containing carbon, oxygen and calcium.
विकल्प
Chalk
Oxygen
Silicon
Bromine
Nitrous oxide
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उत्तर
Chalk
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संबंधित प्रश्न
Give two examples for the following: Metals
Differentiate between:
Homogenous and heterogenous substances
Name: a Metal Which is a Poor Conductor of Electricity.
Give two examples of Non-metals.
How is sodium chloride different from its constituent elements, sodium and chlorine in its properties? Justify.
Give two examples of the following.
Inert gases
Give reason: A frying pan is made up of steel but its handle is made up of wood.
Indicate whether the following statement is true or false:
Ozone is a triatomic molecule
Tick (√) the correct alternative from the choice given for the following statement.
Atoms of different kinds combine to form molecules of
Tick (√) the correct alternative from the choice given for the following statement.
Gold is used to make jewellery because
Tick (√) the correct alternative from the choice given for the following statement
A gaseous non-metal.
Complete the statement given below by filling in the blank with the correct word.
From the elements nitrogen, chlorine, bromine, the element present in the atmosphere is ________.
Select the correct answer to the statement given below:
A metalloid
Define the term ‘compound’. In the compound carbon dioxide – the elements carbon & oxygen are combined in a fixed ratio. Explain.
Give an example of two liquids that form heterogeneous mixtures.
Select the correct answer from the choice given below to complete the sentence :
Dust in air is an example of _________ mixture.
State true of false. If false, give the correct statement.
Two different elements may have similar atoms.
Higher Order Thinking Skills.
In the diagram given below, the circle, square and triangle represent the atoms of different elements.
Identify all combinations that represent
- molecule of a compound
- molecule of an element consisting of two atoms
- molecule of an element consisting of three atoms
Assertion: Air is a mixture of elements only.
Reason: Only nitrogen, oxygen and neon gases exist in air.
Name the two elements which are derived from the country.
