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प्रश्न
Give one use of the following substance:
Brass
Give one use of brass.
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उत्तर
- Brass is used to make cooking utensils, screws, nuts, bolts, wires, tubes, scientific instruments such as microscopes, and ornaments.
- Brass is also used to make vessels such as flower vases and fittings for fancy lamps.
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संबंधित प्रश्न
Give two examples of the following.
Elements which are liquids
Fill in the blank
_________ refers to the number of atoms in the molecule of an element
Tick (√) the correct alternative from the choice given for the following statement
A non-metal which is a good conductor of electricity.
Differentiate between the terms –
elements, compounds & mixtures.
Draw a labelled diagram of an atom including its nucleus, orbits & their contents.
Select the correct answer from the choice given below.
The unreactive non-metallic element
Write the names of elements from the following symbol:
Zn
Give three differences between elements & compounds with relevant examples.
The diagram represents fractional distillation for the separation of mixtures. Answer the following :
- Can two immiscible liquids be separated by this process?
- Separation of liquids by this process is based on which physical property?
- If methyl alcohol & water are to be separated, which liquid would remain in flask ‘X’ after condensation.
- Give a reason for the above answer.
- State the purpose of the fractionating column in the apparatus.
Atoms: Fundamental particle of an element::______ : Fundamental particles of a compound.
