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-Bubble the gases in separate test tubes containing acidified Potassium dichromate(VI) solution.
-Both changes the Orange colour of acidified Potassium dichromate(VI) solution to green.
-Yellow solid residue/deposit is formed with Hydrogen sulphide.
john3 answered the question on November 3, 2017 at 08:24
- 1.(a) Define electrolysis
(b) During the electrolysis of molten aluminium oxide, write the equations at the;
Anode -
Cathode -(Solved)
1.(a) Define electrolysis
(b) During the electrolysis of molten aluminium oxide, write the equations at the;
Anode -
Cathode -
Date posted: November 3, 2017. Answers (1)
- Give any two differences between alpha and beta particles(Solved)
Give any two differences between alpha and beta particles
Date posted: November 3, 2017. Answers (1)
- Describe how sodium sulphate crystals can be prepared starting with 50cm3
of 2M sodium hydroxide and 1M sulphuric
(VI) acid(Solved)
Describe how sodium sulphate crystals can be prepared starting with 50cm3
of 2M sodium hydroxide and 1M sulphuric
(VI) acid
Date posted: November 3, 2017. Answers (1)
- Explain why Aluminium is better conductor of electricity than magnesium(Solved)
Explain why Aluminium is better conductor of electricity than magnesium
Date posted: November 3, 2017. Answers (1)
- Name one piece apparatus used to measure volume of gases(Solved)
Name one piece apparatus used to measure volume of gases
Date posted: November 3, 2017. Answers (1)
- Explain why solid Carbon (IV) oxide is preferred over ordinary ice for use by ice cream vendors(Solved)
Explain why solid Carbon (IV) oxide is preferred over ordinary ice for use by ice cream vendors
Date posted: November 3, 2017. Answers (1)
- Nitric acid is used to make ammonia nitrate. State two uses of ammonium nitrate(Solved)
Nitric acid is used to make ammonia nitrate. State two uses of ammonium nitrate
Date posted: November 3, 2017. Answers (1)
- The first step in the industrial manufacture of nitric acid is the catalytic oxidation of ammonia gas.
(i) What is the name of the catalyst used(Solved)
The first step in the industrial manufacture of nitric acid is the catalytic oxidation of ammonia gas.
(i) What is the name of the catalyst used
Date posted: November 3, 2017. Answers (1)
- (a) An electrolytic cell is set up a form two class to perform an electrolysis of brine using carbon chloride.(i) What is brine?(Solved)
(a) An electrolytic cell is set up a form two class to perform an electrolysis of brine using carbon chloride.
(i) What is brine?
(ii) Identify the cations in brine
Date posted: November 3, 2017. Answers (1)
- Explain how water hardness is removed by ion exchange method(Solved)
Explain how water hardness is removed by ion exchange method
Date posted: November 3, 2017. Answers (1)
- A piece of burning magnesium was lowered into a gas jar containing nitrogen oxide. State and explain the observations made
-Write an equation for the reaction...(Solved)
A piece of burning magnesium was lowered into a gas jar containing nitrogen oxide. State and explain the observations made
-Write an equation for the reaction above.
Date posted: November 3, 2017. Answers (1)
- State two uses of sodium carbonate(Solved)
State two uses of sodium carbonate
Date posted: November 3, 2017. Answers (1)
- A mixture of kerosene and water was shaken and left to stand, ammonia gas was then bubbled into the mixture followed by a few drops...(Solved)
A mixture of kerosene and water was shaken and left to stand, ammonia gas was then bubbled into the mixture followed by a few drops of phenolphthalein indicator. State and explain the observations made
Date posted: November 3, 2017. Answers (1)
- If chlorine gas is passed over heated iron fillings and the product dissolved in water, a yellow solution is formed.(i) Identify the yellow solution(Solved)
If chlorine gas is passed over heated iron fillings and the product dissolved in water, a yellow solution is formed.
(i) Identify the yellow solution.
(ii) What would be observed if aqueous sodium hydroxide solution was added to the yellow solution?
Date posted: November 3, 2017. Answers (1)
- Name the most suitable method you can use to separate;(a) Xanthophyll and chlorophyll in green leaves. (b) Oil from simsim seeds.(Solved)
Name the most suitable method you can use to separate;
(a) Xanthophyll and chlorophyll in green leaves.
(b) Oil from simsim seeds.
Date posted: November 3, 2017. Answers (1)
- Explain why the order of reactivity increases down group I elements but decreases down group (VII) elements(Solved)
Explain why the order of reactivity increases down group I elements but decreases down group (VII) elements.
Date posted: November 3, 2017. Answers (1)
- Name the ore from which copper is commonly extracted(Solved)
Name the ore from which copper is commonly extracted
Date posted: November 3, 2017. Answers (1)
- Briefly explain the following observations.
(i) Alkaline earth metals are generally less reactive than the alkali metals(Solved)
Briefly explain the following observations.
(i) Alkaline earth metals are generally less reactive than the alkali metals
Date posted: November 3, 2017. Answers (1)
- How does the use of manganese (IV) oxide in the laboratory preparation of chlorine gas differ from its use on the laboratory preparation of oxygen...(Solved)
How does the use of manganese (IV) oxide in the laboratory preparation of chlorine gas differ from its use on the laboratory preparation of oxygen gas?
Date posted: November 3, 2017. Answers (1)
- What is meant by molar heat of formation?(Solved)
What is meant by molar heat of formation?
Date posted: November 3, 2017. Answers (1)