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प्रश्न
Tick (√) the correct alternative from the choice given for the following statement
The hardest naturally occurring substance
विकल्प
Oxygen
Diamond
Zinc
Graphite
Gold
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उत्तर
Diamond
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संबंधित प्रश्न
Name the technique that you use if only the solid component of a solution is required.
Give one example for the following types of mixtures:
liquid-gas homogenous mixture
Define: Formula
Indicate whether the following statement is true or false:
Metals reflect light and are good conductors of electricity
The important physical properties of substances are colour, odour, nature, density & solubility in water.
Name – two coloured gases (with their colours)
Write the names of elements from the following symbol:
Xe
Give a reason for the following statement :
The filter paper made into a cone & placed in a funnel for filtering out the solid particles in a solid-liquid mixture should be moistened before placing it.
Elements are made up of______ kinds of atoms.
State true of false. If false, give the correct statement.
Two different elements may have similar atoms.
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 other than carbon that shows allotropy.
