ICSE Worksheet for chapter-7 Metallurgy class 10

Worksheet For class 10

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Standard 10 students can practice questions and answers which are given here for Chemistry in Grade 10 that will help them to improve their knowledge of all important chapters and their topics. Students can also download free pdf of Class 10 Chemistry Notes prepared by teachers and solve important problems provided here with solutions on daily basis to get more scores in school exams and tests.

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Summary

  1. Definition of metals and non-metals.
  2. Comparison of metals and non-metals(physical and chemical properties)
  3. General characteristics of alkali and alkaline earth metals, metallic compounds-(oxides, hydroxide, carbonates, nitrates), activity series
  4. Metallurgy, extraction of Aluminium.
  5. Properties and uses of metals, alloys, corrosion.

Section - 1

Q1. Name the different metals for the following uses:

  1. In accumulators of car batteries
  2. For galvanizing iron
  3. As silver paper
  4. In a torch cell
  5. In flashlight photography
  6. In vapour lamps

Q2. Name the metal in each case, which has the following descriptions:

  1. The metal alloyed with zinc to form brass.
  2. Two elements, whose hydroxides are easily soluble in water and form alkaline solutions.
  3. One metal, which forms more than one type of positive ions.
  4. One ion responsible for blue color of an aqueous solution of copper sulphate.
  5. The elements added to iron to form stainless steel.

Q3. Give the names of non-metals that exhibit the following properties:

  1. A non-metal which is the hardest naturally occurring substance.
  2. Two non-metals whose oxides are neutral towards litmus.
  3. A non-metal which is essential for organic compounds.
  4. A non-metal which is essential for respiration.
  5. A non-metal which is the source of energy in the sun and stars.
  6. A non-metal used for curing skin diseases.

Section - 2

Q4. What will happen, if a strip of copper is kept immersed in the solution of silver nitrate?

Q5. Why is cryolite added to alumina in the extraction of aluminium? What is the molecular formula of cryolite?

Q6. Why extraction of aluminium was difficult?

Q7. Differentiate between:

  1. Slag and Flux
  2. Calcination and Roasting

Q8. Compare the properties of a typical metal and a non-metal on the basis of the following:

  • Electronic configuration
  • Nature of the oxides
  • Oxidizing or reducing action
  • Conductivity of heat and electricity

Q9. What is the difference between a mineral and an ore?

Q10. Name two ores of iron.

  • Name three raw materials used in the extraction of iron.
  • Write equations that occur in the ‘Blast Furnace’.
  • What are the main constituents of steel?
  • What is tempering of steel?

Q11. Arrange the metal oxides given below according to the activity series with the oxide which is most difficult to reduce placed first.

  • Aluminium oxide, copper oxide, iron (III) oxide, magnesium oxide.
  • Iron (III) oxide is the obtained in the blast furnace.
  • What is the name of the iron ore which is largely composed of iron (III) oxide?

Q12. Name from the of substances given below, the substances which you would use to prepare each of the following salts, named in parts (i) to (iv). The substances are:

Copper, Lead, sodium, Zinc, Copper oxide, lead carbonate, sodium carbonate solution, Duilute hydrochloric acid, Dilute nitric acid and Dilute sulphuric acid.

  • Zinc sulphate
  • Sodium sulphate
  • Copper sulphate
  • Lead sulphate

Q13. Why is sodium not found native in nature?

“Aluminium cannot be extracted by reduction of its ores by carbon.” Explain briefly.

Three different forms of iron are given as:

  • Cast iron
  • Wrought iron 
  • Steel

State against each article listed below, which form of iron it is made from:

Are made from Reasons for the choice

  • Nails ( ) _______________________
  • Car wheel springs ( ) _______________________
  • House drain pipes ( ) _______________________
  • Safety razor blades ( ) _______________________

Q14. The equation :Fe2 O3+3CO→2Fe+3CO2, represents the changing of iron ore into iron..

  • What compound has been oxidized?
  • What compound has been reduced?
  • Explain giving chemical equations, how carbon monoxide is produced in a blast furnace?

The gases below have symbols A, B, C, D and E. Identify the gases by stating their names from the list:

SO2,CO,H2 S,NH3and H2.

  • A gas A obtained on adding dil. H2 SO4to iron (II) sulphide.
  • A gas B obtained by boiling water with a nitride of a trivalent metal.
  • The gas C liberated when concentrated H2SO4reacts with formic acid.
  • A neutral gas D obtained when manganese reacts with very dilute HNO3.
  • A gas E obtained on roasting zinc blende at high temperature.

Given two reasons for aluminium, being pregerred to copper for the manufacturing of cooking utensil.

Q15. In industry certain metals are extracted from their oxides by heating with carbon in the form of coke. Give the name of one such metal.

What are the ions present in:

  1. Brine solution
  2. Molten sodium chloride?
  3. Zincite is the ore of zinc. Name two other ores of zinc used in its extraction.

Q16. Given equation and indicate very briefly the procedure you will dopt to prepare crystals of zinc sulphate from zinc filings.

  1. Zinc sulphate is called a ‘salt’ sulphur dioxide an ‘acidic oxide’ and lead monoxide a ‘basic oxide’. What is meant by these terms?
  2. Name three classes of substances that react with an acid to form salts. Write equations acids. Give ionic equations for each reaction.

Q17. What is meant by ‘ore’ and ‘slag?

  • Name two metals that occur partly in native or free state.
  • Name the processes involved in concentration of ore in metallurgy.

Q18. Give the common names and formulae of three ores for each from which aluminum, iron and zinc are extracted.

  • What is a lone pair of electrons?
  • Draw an electron dot diagram of a hydronium ion and label the lone pair of electrons.
  • Name a neutral covalent molecule which contains one lone pair of electrons.
  • What are the difficulties faced in the extraction of aluminium by electrolytic extraction of aluminium by electrolytic reduction of fused alumina? State two ways how these difficulties are resolved.
  • Calculate the % of sodium in sodium aluminium fluoride correct to the (Na3 AIF6 ) nearest whole number (F=19, NA=23, A1=27).

Q19. Iron sheets are often given a thin coating of zinc metal. What is the process called and why is it done?

Q20. Name an alloy of a metal with a non-metal. Can we get alloys between

  • a metal and another metal
  • a metal and another non-metal?

Q21. The diagram give below is to prepare Iron (III) chloride in the laboratory:

  1. What is the substance B?
  2. What is the purpose of B?
  3. Why is iron (III) chloride to be stored in a closed container?
  4. Write the equation for the reaction between iron and chlorine.
  5. Write the equation(s) for the reaction(s) to prepare lead sulphate from lead carbonate.
  6. Methane is the first member of alkane, when is treated with excess of chlorine in the presence of diffused sunlight forms carbon tetrachloride. Draw the appropriate structural formula of carbon tetrachloride and state the type of bond present in it.

Aqueous solution of nickel sulphate contains Ni(2+) and SO4(2-)ions.

  • Which ion moves towards the cathode?
  • What is the product at the anode?

Q22. A metal article is to be electroplated with silver. The electrolyte selected is sodium argentocyanide.

  • What kind of salt is sodium argentocyanide?
  • Why is it preferred to silver nitrate as an electrolyte?
  • State one condition to ensure that the deposit is smooth, firm and long tasting.
  • Write the reaction taking place at the cathode
  • Write the reaction taking place at the anode.

The sketch below illustrated the refining of aluminium by Hoope’s process.

  • Which of A and B is the cathode and which one is the anode?
  • What is the electrolyte in the tank?
  • What material is used for the calthode?

State the property of the metal being utilized in the following:

Use of metal

Property

 

Zinc in galvanization

 

 

Aluminium in thermite welding

 

 

Q23. Give reasons for the following:

  • Graphite anode is used during electrolysis of fused lead bromide.
  • In electrolysis of acidified water, dilute is preferred to dill. acid for acidification.
  • A solution of silver nitrate is a good electrolyte but it is not used for electroplating an article with silver.

Identify the following reactions as either oxidation or reduction:

  • O+2e-→O2-
  • K-e-→K+
  • Fe3++e-→Fe2+

Name the substance used for drying ammonia

  • Write an equation to illustrate the reducing nature of ammonia
  • With reference to Haber’s process for the preparation of ammonia, write the equation and the conditions required.

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