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प्रश्न
Classify the following substances into elements and compounds
Mercury, sulphur, sugar, water, sand, gold, carbon, oxygen, alcohol, iron, marble, baking soda.
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उत्तर
Element: Mercury, sulphur, gold, carbon, oxygen, iron.
Compound: Sugar, water, sand, alcohol, marble, baking soda.
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संबंधित प्रश्न
Give one example for the following types of mixtures :
misicible liquids
Give the symbols of: Carbon, calcium, copper, chlorine, cobalt, argon.
Define: Formula
Give one use of the following substance:
Brass
Answer the following question:
Why are copper and aluminium used to make electric wires?
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 blanks with the correct words.
From the elements – He, Br, Pt, and O; the element which is metallic is ____, an inert element is ____, forms a triatomic molecule is ____, is liquid at room temperature is_ ___.
The first letter of an element is always written in ______ letter.
Non-metals are usually poor conductors of heat and electricity. They are non-lustrous, non-sonorous, non-malleable and are coloured.
Name a non-metal which is required for combustion.
What is the Latin name of Sodium?
