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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
Fill in the blank
Use of a ................. to separate the components of a mixture of solids is based on the difference in the size of the components
Fill in the blan
An ________ is a homogeneous mixture of two or more metals.
Give two examples of Non-metals.
Write the names of elements from the following symbol:
Ir
Elements are broadly classified into metals and non-metals. State six general differences in the physical properties of metals and non-metals. State two metals and two non-metals which contradict with the general physical properties – giving reasons. State one difference in property between metalloids and noble gases.
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.
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.
What is the Latin name of Sodium?
Complete the table:
| Element | Latin Name | Symbol |
| Mercury | ______ | Hg |
| Lead | Plumbum | ______ |
| Iron | ______ | Fe |
| Potassium | Kalium | ______ |
