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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
Fill in the blank
A pure substance has definite.................. and constant ..............
Name: a non-metal which is lustrous
Define Elements.
Give two examples of non-metals.
Name: Two substances used to make jewellery.
Give reason: Graphite is used to make a lead of the pencils.
Find the atomicity of the Following molecule:
Calcium Chloride
Indicate whether the following statement is true or false:
Molecules can exist independently.
Indicate whether the following statement is true or false:
Molecules combine to form atoms
Complete the statement with the correct words.
Acid’s are chemicals which are _____ in taste and derived from plants and ________.
Select the correct answer from the choice given below.
A group of atoms of elements
Select the correct answer from the choice in the bracket.
The least reactive metal.
Give a reason for the following statement :
Brass & bronze are examples of mixtures, while copper sulphate & lead nitrate are examples of compounds.
Elements are the______ form of pure substances.
State true of false. If false, give the correct statement.
Two different elements may have similar atoms.
Differentiate metals and non-metals.
Higher Order Thinking Skills.
List out the metals, non-metals and metalloids which you use in your house, schools. Compare their properties.
Name the element which is used for making computer chips.
