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i) Deliquescence
ii) Efflorescence
Njeri K answered the question on September 30, 2017 at 23:07
- What compounds form when hot concentrated sodium hydroxide is used instead of the cold
dilute sodium hydroxide.(Solved)
What compounds form when hot concentrated sodium hydroxide is used instead of the cold
dilute sodium hydroxide.
Date posted: September 29, 2017. Answers (1)
- Explain why the error in the Dalton's theory has not affected its validity?(Solved)
Explain why the error in the Dalton's theory has not affected its validity?
Date posted: September 29, 2017. Answers (1)
- Explain why a substance conducts electric current when in molten state and not in solid state.(Solved)
Explain why a substance conducts electric current when in molten state and not in solid state.
Date posted: September 28, 2017. Answers (1)
- A dry cell is used as a source of electric current.
State the role of manganese (IV) oxide mixed with carbon(Solved)
A dry cell is used as a source of electric current.
State the role of manganese (IV) oxide mixed with carbon
Date posted: September 28, 2017. Answers (1)
- During the extraction of zinc metal, the ore is crushed into powder and mixed with water and oil.
Air is also blown through the mixture.
i) What...(Solved)
During the extraction of zinc metal, the ore is crushed into powder and mixed with water and oil.
Air is also blown through the mixture.
i) What name is given to the process described above?
ii) The hull of a ship is made using Iron and blocks of zinc to prevent rusting. How does zinc
prevent the rusting of iron?
iii) Explain the process named in (i) above occurs.
Date posted: September 28, 2017. Answers (1)
- Fossil fuels are commonly used as sources of energy. Hydrogen gas is also a source of energy.
State and explain why hydrogen is a more attractive...(Solved)
Fossil fuels are commonly used as sources of energy. Hydrogen gas is also a source of energy.
State and explain why hydrogen is a more attractive fuel than the fossil fuels.
Date posted: September 28, 2017. Answers (1)
- Giving a reason, state what would be observed if concentrated hydrochloric acid is added
drop wise to a solution of Bismuth chloride.(Solved)
Giving a reason, state what would be observed if concentrated hydrochloric acid is added
drop wise to a solution of Bismuth chloride.
Date posted: September 28, 2017. Answers (1)
- Name the following processes (i) When anhydrous calcium chloride was left in an open beaker overnight a solution was formed (ii) When sodium carbonate decahydrate crystals are...(Solved)
Name the following processes
i) When anhydrous calcium chloride was left in an open beaker
overnight a solution was formed.
ii) When sodium carbonate decahydrate crystals are left in an open beaker for some days it turned
into powder.
Date posted: September 28, 2017. Answers (1)
- Briefly explain how the calcium is separated from sodium in the down’s cell.(Solved)
Briefly explain how the calcium is separated from sodium in the down’s cell.
Date posted: September 28, 2017. Answers (1)
- List the main uses of Sulphur(Solved)
List the main uses of Sulphur
Date posted: September 27, 2017. Answers (1)
- List and explain the physical properties of Sulphur(Solved)
List and explain the physical properties of Sulphur
Date posted: September 27, 2017. Answers (1)
- Name the two allotropes of sulphur(Solved)
Name the two allotropes of sulphur
Date posted: September 26, 2017. Answers (1)
- State three uses of hydrogen nitrate(Solved)
State three uses of hydrogen nitrate
Date posted: September 26, 2017. Answers (1)
- Define the term catenation?(Solved)
Define the term catenation?
Date posted: September 26, 2017. Answers (1)
- Both graphite and molten sodium chloride conduct electricity,state how each of the substances conduct electricity?(Solved)
Both graphite and molten sodium chloride conduct electricity,state how each of the substances conduct electricity?
Date posted: September 26, 2017. Answers (1)
- List five substances that undergo sublimation?(Solved)
List five substances that undergo sublimation?
Date posted: September 26, 2017. Answers (1)
- Define the term sublimation(Solved)
Define the term sublimation
Date posted: September 26, 2017. Answers (1)
- Define the term chromatography?(Solved)
Define the term chromatography?
Date posted: September 26, 2017. Answers (1)
- Name three methods used in separation of mixtures?(Solved)
Name three methods used in separation of mixtures?
Date posted: September 26, 2017. Answers (1)
- What is a conductor?(Solved)
What is a conductor?
Date posted: September 26, 2017. Answers (1)