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प्रश्न
Select the correct answer to the statement given below:
The chemical name for dinitrogen oxide [N20].
विकल्प
Chalk
Oxygen
Silicon
Bromine
Nitrous oxide
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उत्तर
Nitrous oxide
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संबंधित प्रश्न
Name: a Liquid Non-metal
Classify the following substances into elements and compounds
Mercury, sulphur, sugar, water, sand, gold, carbon, oxygen, alcohol, iron, marble, baking soda.
Give two examples of Noble gases.
Give two examples of the following.
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Give two examples of the following.
Non-metals which are lustrous
State the number of atoms of each element, present in \[\ce{HNO3}\].
Also name the compound.
Name: Two substances used to make electric wires
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.
The most abundant elements in the universe are
Tick (√) the correct alternative from the choice given for the following statement
A metal which is brittle
Complete the statement given below by filling in the blank with the correct word.
An element is a pure substance which cannot be broken down by physical or _________ methods.
Give a reason for the following statement:
Components in a mixture are present in varying proportions and not in a fixed proportion.
Select the correct answer from A, B, C, D & E for the statement given below :
A metalloid.
Elements are the______ form of pure substances.
What are elements? What are they made of?
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
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Give an example of each mixture having the following characteristics. Suggest a suitable method to separate the components of this mixture
Two or more coloured constituents are soluble in some solvent.
Higher-Order Thinking questions:
Why is hydrogen considered an element?
Give the chemical formula for cane sugar.
Name the element which is used in toothpaste to strengthen our teeth.
