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प्रश्न
Classify the following substances into compounds and mixtures:
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उत्तर
Carbon dioxide, air, water, milk, common, salt, blood, fruit juice, iron sulphide.
Carbon dioxide — (Compound)
air — (Mixture)
water — (Compound)
milk — (Mixture)
common salt — (Compound)
blood — (Mixture)
fruit juice — (Mixture)
iron sulphide — (Compound)
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संबंधित प्रश्न
Write true or false
All pure substances have characteristic melting and boiling points.
Give one use of the following substance:
Iron
Give one use of the following substance:
Brass
Give one use of the following substance:
Coal
Answer the following question:
Why are copper and aluminium used to make electric wires?
Fill in the blank
A metal which is a poor conductor of electricity is _______.
Write the names of elements from the following symbol:
Cu
There are ______ number of known elements.
Oxygen is very essential for us to live. It forms 21% of air by volume. Is it an element or compound?
Name the element which is used in toothpaste to strengthen our teeth.
