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The dye is oxidized to a new product with chlorine (1mk) but oxygen is removed to form an unstable product which gradually
gets re-oxidized by atmospheric oxygen on exposure for some time to air (1mk) in the case of Sulphur (IV) oxide
john3 answered the question on November 4, 2017 at 22:39
- One of the alloys of copper is brass. State its two uses. (Solved)
One of the alloys of copper is brass. State its two uses.
Date posted: November 4, 2017. Answers (1)
- During the extraction of copper metal the ore is subjected to froth floatation. Give a reason why this process is necessary(Solved)
During the extraction of copper metal the ore is subjected to froth floatation. Give a reason why this process is necessary
Date posted: November 4, 2017. Answers (1)
- Explain this observation:When hydrogen chloride gas is dissolved in water, the solution conducts electricity while a solution of hydrogen chloride gas in methyl benzene does...(Solved)
Explain this observation:
When hydrogen chloride gas is dissolved in water, the solution conducts electricity while a solution of hydrogen chloride gas in methyl benzene does not conduct electricity.
Date posted: November 4, 2017. Answers (1)
- Give the agencies of the cation and onion in each of the following compounds. (1)Zinc sulphate (2)Magnesium carbonate (3)Aluminium nitrate (Solved)
Give the agencies of the cation and onion in each of the following compounds.
1)Zinc sulphate
2)magnesium carbonate
3)Aluminium nitrate
Date posted: November 4, 2017. Answers (1)
- Identify the catalyst preferred in contact process. Explain(Solved)
Identify the catalyst preferred in contact process. Explain
Date posted: November 3, 2017. Answers (1)
- Using acidified potassium dichromate (VI) solution, describe how you would differentiate between sulphur (IV) oxide and hydrogen sulphide(Solved)
Using acidified potassium dichromate (VI) solution, describe how you would differentiate between sulphur (IV) oxide and hydrogen sulphide
Date posted: November 3, 2017. Answers (1)
- 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)