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प्रश्न
Select the correct answer from A, B, C, D & E for the statement given below :
A noble gas.
विकल्प
Gunpowder
Iodine
Boron
Helium
Bromine
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उत्तर
A noble gas: Helium
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संबंधित प्रश्न
Write true or false
All pure substances have characteristic melting and boiling points.
What are the advantages of chromatography?
Define:
Atomicity
Explain the difference between Metals and non-metals.
State four differences between – elements, compounds and mixtures with suitable examples.
With reference to elements – define the term ‘molecule’. Give two examples each of a monoatomic, diatomic & polyatomic molecule.
Select the correct answer from A, B, C, D & E for the statement given below :
A non-metal that is lustrous.
Give a reason for the following statement :
Brass & bronze are examples of mixtures, while copper sulphate & lead nitrate are examples of compounds.
Classify the substances given in Fig. 2.2 into elements and compounds
Complete the table by writing the symbols of the following elements
| Element | Symbol |
| Aluminum | Al |
| Nickel | |
| Bromine | |
| Helium | |
| Magnesium |
