Advertisements
Advertisements
Question
Answer the following question:
Why are copper and aluminium used to make electric wires?
Solution
Copper and aluminium are good conductors of heat and electricity. They can be drawn into wires and beaten into sheets. Therefore, they are used to make electric wires.
APPEARS IN
RELATED QUESTIONS
Name: a Liquid Non-metal
Classify the following substances into elements and compounds
Mercury, sulphur, sugar, water, sand, gold, carbon, oxygen, alcohol, iron, marble, baking soda.
State the number of atoms of CaCO3
Find the atomicity of the Following molecule:
Calcium Chloride
Tick (√) the correct alternative from the choice given for the following statement
The most ductile metal.
Select the correct answer from the choice given below.
An impure substance
Who are my companions?
Group 'A' | Group 'B' |
1. Stainless steel | (a) Non-metal |
2. Silver | (b) compound |
3. Bhajani mixture for milling | (c) Mixture |
4. Salt | (d) Element |
5. Coal | (e) Alloy |
6. Hydrogen | (f) Metal |
Select the correct answer from A, B, C, D & E for the statement given below :
A mixture consisting of elements & a compound.
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.
Complete the table:
Element | Latin Name | Symbol |
Mercury | ______ | Hg |
Lead | Plumbum | ______ |
Iron | ______ | Fe |
Potassium | Kalium | ______ |