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प्रश्न
Give a reason for the following statement :
Brass & bronze are examples of mixtures, while copper sulphate & lead nitrate are examples of compounds.
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उत्तर
Brass and bronze are mixtures as the composition of elements are not fixed by mass and has no formula.
Lead nitrate and copper sulphate are compounds as they have a fixed ratio of elements by mass and have a formula like Pb[NO3]2 and CuSO4.
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संबंधित प्रश्न
Fill in the blank
A pure substance has definite.................. and constant ..............
Name: a Non-metal Which is a Good Conductor of Electricity.
Give two examples of the following.
Metals which are soft
The important physical properties of substances are colour, odour, nature, density & solubility in water.
Name – a gas with a pungent, choking odour which is lighter than air
Select the correct answer from the choice given below.
An impure substance
Select the correct answer from A, B, C, D & E for the statement given below :
A mixture consisting of elements & a compound.
Non-metal conducting electricity :______ :: Metal conducting electricity : Copper
Match the following.
| Atom | Building block of matter |
| Element | Atoms of different kinds |
| Compound | Atoms of the same kind |
| Molecule | Smallest unit of a substance |
Why are utensils made up of aluminium and brass?
Complete the table:
| Element | Latin Name | Symbol |
| Mercury | ______ | Hg |
| Lead | Plumbum | ______ |
| Iron | ______ | Fe |
| Potassium | Kalium | ______ |
