Metal and non-metal important Question Answers.
- Define the following term
- Minerals.
- Ore.
- Gangue.
- Minerals are naturally occurring elements or compounds. That are found on earth surface in its free state, or in crystal form.
- Ore = Ore is natural rock or sediment that contains one or more valuable minerals concentrated in it. Typically containing metals, that can be mined, treated and sold at a profit. The grade of ore refers to the concentration of the desired material it contains.
- Gangue :Contaminated ore with large amount of impurities such as soil, sand, etc., are called gangue.
The impurities must be removed from the ore prior to the extraction of the metal.
Q2. The three metals X,Y and Z. ‘X’ reacts with cold water. ‘Y’ reacts with hot water and ‘Z’ with steam only. Identify X, Y and Z and also write chemical equation. Then arrange them according to their reactivity series.
- Metal ‘X’ can be sodium, potassium or calcium.
2K + H20 = KOH + H2 + heat energy.
Na + H2O = NaOH + H2 + heat energy. - ’Y’ metal can be Magnesium.
- ’Z’ metal can be aluminium, iron, or zinc
Q3. What will Happen when calcium reacts with water. Also, write its chemical equation.
Q4. Answer the following question.
(a) Name two metals which are found in nature in free state.
(b) What chemical process is used for obtaining a metal from its oxide.
(c) What are alloys.
Q5. A non-metal X exist in two different forms Y and Z. Y is hardest natural substance, whereas Z is a good conductor of electricity. Identify X, Y and Z.
Q6. Why carbonate and sulphide ore are usually converted into oxide during the process of Extraction.
Q7. Stainless steel is very useful material for our life. In stainless steel iron is mixed with_________________
Q8. Write the steps for the extraction of copper from its ore and also write the reaction involved in it.
Q9. Write chemical reactions for the reduction of metal oxide for the extraction of pure metal in two ways.
Q10. Write complete steps for the extraction of Zinc from its sulphide and carbonate ore.
Q11. Write Thermite reaction.
Q12. Write elements combination for the formation of alloys.
- Amalgam =
- Brass.
- Bronze.
- Solder wire.
Q13. What do you mean by 22 carat gold?
Q14. Complete the reaction.
- Al2O3 + ____________ = ____________ + ____________
- Al2O3 + ____________ = ____________ + ____________
