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प्रश्न
Tick (√) the correct alternative from the choice given for the following statement.
Sand is a compound of
विकल्प
silicon and nitrogen
silicon and oxygen
oxygen and sulphur
none of the above
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उत्तर
silicon and oxygen
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संबंधित प्रश्न
Give two examples of the following.
Non-metals which are lustrous
Name: Three different forms of carbon
Answer the following question:
Give the advantages of using symbols instead of names of elements or compounds.
Tick (√) the correct alternative from the choice given for the following statement.
All pure substances have
Write an answer to the following question in your own words.
Which elements (metals and non-metals), compounds and mixtures do we use in our day-to-day life?
Select the correct answer from the choice in the bracket.
The least reactive metal.
With reference to elements – define the term ‘molecule’. Give two examples each of a monoatomic, diatomic & polyatomic molecule.
Select the correct answer from the choice given below to complete the sentence :
Compounds are ____________ in nature.
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
Higher-Order Thinking questions:
Why is hydrogen considered an element?
