WORK SHEET / ELECTROLYSIS / IGCSE / GCSE / OXIDATION AND READUCTION

1.Name the process of the industrial extraction of oxygen
……………………………………………

What is oxidation?……………………………………….

What is reduction?…………………………

Give example for oxidizing

agent…………………………………………….

Give example for reducing agent…………………

2.Complete these reactions
( balance )S+ O2__________
Fe + O2__________
Mg + O2 _____________
Cu + O 2_________
C +O 2 ___________
CH4 + O2_____________

3.Describe an experiment to determine the % of oxygen in air (copper turning )

4.Give the reaction of sulphur dioxide with water…………………………………………….

Give two equations for the reactions in contact process ( impor)
…………………………………………………………….……………………………………………………….

5.Which one is reversible reaction?……………………………………………


6.Describe the laboratory preparation of carbon dioxideGive the equation for reaction……………………………………………………………………………….


7.Give the uses of carbon dioxide…………………………………

8.What is dry ice?……………………………

9.Give two uses of dry ice………………………………………..
10.Give the reaction of nitrogen with oxygen
( 2 equations)………………………………………
11.Give the conditions needed for the rusting of iron

12.Give method for the prevention of rusting

13.How this method work in preventing rusting of ironExplain sacrificial protection. Give example.

14.Sodium can be prepared by electrolysis only were as iron fro blast furnace give your answer (in terms of reactivity)

15.Give the allotropes of sulphur

Name the process by which nitrogen is industrially

extracted………………………………………………………………..

Give one use of nitrogen……………………………………….

16.Why nitrogen is used for protecting dry foods……………………………………………….

Describe the laboratory preparation of ammonia

17.Give the equation for the preparation………………………………………………………………..

18.Give physical properties of ammonia………………………………………………………………………………………

19.ammonia dissolve in water forms …………………………………………
give the equation………………
…………………………
20.Give the uses of ammoniato prepare nitric acidto prepare fertilizer

Give the reaction between sulphuric acid and ammonia ( important)

NH 3 + H2SO4 ----------- (NH4)2 SO4 ( AMMONIUM SULPHATE)


21.Give the reaction between NITRIC acid and ammonia ( important)

NH3+ HNO3 ------- NH 4 NO3( AMMONIUM NITRATE)

22.What are the elements present in NPK FERTILIZER?………………………………………………………..

23.Describe the chemical test for water……………………………………………………………..

24.Describe the physical test for water………………………………………………………………


25.Describe the laboratory preparation of hydrogen

26.Name the gas produced when a metal react with dilute acid…………………………………………………….

27.Give the test for this gas…………………………………………………….

28.Give word equation for the reaction between hydrogen and oxygen…………………………………………………..

29.Give balanced equation for the reaction between hydrogen and

oxygen…………………………………………………..

30.Give one example for transition metal which is used as catalyst…………………………………………………….

31.Iron react with chlorine to form a yellow( brown) color solid
Name it…………………………….

Give equation for the reaction…………………………………………………..

Give the color of ion with sodium hydroxide

Fe2+ …………………Fe3+…………………Cu2+ ………………

32.Name the compounds……………………………………………………..Write down the action of iron over steam.

33.Give the balanced equation ( notes)…………………………………………………………………..

34.Write down the action of iron hydrogen chloride gas Give the balanced equation
ColorCopper oxide-redCopper hydroxide – blueCopper nitrate –greenCopper sulfate- blueCopper carbonate-blackCopper chloride- green


35.Write down the reaction of ammonia with copper (II) ions ( important)………………………………………………………………………………


36.Give the properties of transitional metals( answer given below)
1) variable valency2) colored compounds3) catalytic property


work sheet 2
1,Give example for Fe shows variable valency…………………………………………………………………….


What is reactivity series?


2.Give the order…………………………………………………………………………………


3.What do you know about the reactivity of and displacement reaction?………………………………………………………………………….


4.A copper dipped in silver nitrate solution .5.What is observation that you seeAfter 2hours……………………………………………………..

6.Iron nail dipped in copper sulphate ……………………………………


7.Silver nail dipped ii copper sulphate……………………………………


8.Copper nail in iron sulphate……………………………..(Important portion)Cat ionFlame colorLithium(Li+Sodium (Na+)Potassium( k+)Calcium( ca2+)test for gases oxygen------------------carbon dioxide----------------hydrogenchlorine-----------------------Sulpher dioxide----------------------ammonia--------------------------Test for anionsChloride(Cl-)-----------------------Bromide(Br ---------------------------Iodide (I-)-----------------------Sulphate(so42+)---------------------Sulphite( S2_)-----------------Carbonate(CO32_)------------------Test for cat ionAmmonia (NH4+)-----------------Copper (Cu2+)---------------Iron( Fe2+)-----------------

9.The pure iron get from the furnace has little use only?

10.The pure iron is rustingGive good methods to prevent rusting………………………………….

11.Give the chemical name of rust.………………………..

12.Why not cool air is blown from bottom.Temperature in side furnace get reduced