a)blood, urine,stool,etc
b)soil,Air,water,leaf sample etc
Henry97 answered the question on November 10, 2017 at 19:36
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Name the intermolecular forces of attraction in water.
(Solved)
Name the intermolecular forces of attraction in water.
Date posted:
November 9, 2017
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Answers (1)
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Carbon (II) oxide, methane and hydrogen are major sources of energy. (i) State and explain three reasons why hydrogen is a very attractive fuel
(Solved)
Carbon (II) oxide, methane and hydrogen are major sources of energy.
i) State and explain three reasons why hydrogen is a very attractive fuel.
ii) State one disadvantage of using hydrogen fuel instead of methane.
Date posted:
November 9, 2017
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Answers (1)
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Give one harmful effect of radioisotopes
(Solved)
Give one harmful effect of radioisotopes
Date posted:
November 9, 2017
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Answers (1)
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Give two uses of hydrogen chloride
(Solved)
Give two uses of hydrogen chloride
Date posted:
November 9, 2017
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Answers (1)
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(a) What is air pollution ? (b) State four gaseous substances present in unpolluted air
(Solved)
(a) What is air pollution?
(b) State four gaseous substances present in unpolluted air
Date posted:
November 9, 2017
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Answers (1)
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a) Why is air considered as a mixture rather than a compound ? (b) State one similarity between rusting and combustion of iron.
(Solved)
(a) Why is air considered as a mixture rather than a compound ?
(b) State one similarity between rusting and combustion of iron.
(c) Explain why iron nails rust faster in sodium chloride solution than in tap water.
Date posted:
November 9, 2017
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Answers (1)
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Magnesium sulphate may be used as a laxative. What does this term laxative mean
(Solved)
Magnesium sulphate may be used as a laxative. What does this term laxative mean
Date posted:
November 9, 2017
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Answers (1)
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Describe how you can differentiate between Lead (II) ions and Calcium ions using Sodium chloride
(Solved)
Describe how you can differentiate between Lead (II) ions and Calcium ions using Sodium chloride
Date posted:
November 9, 2017
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Answers (1)
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Copper (II) Sulphate crystals were placed in a beaker containing water. State and explain the observations made after two days
(Solved)
Copper (II) Sulphate crystals were placed in a beaker containing water. State and explain the observations made after two days.
Date posted:
November 9, 2017
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Answers (1)
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Explain why water fetched in rocky areas tend to boil at higher temperature than distilled water
(Solved)
Explain why water fetched in rocky areas tend to boil at higher temperature than distilled water
Date posted:
November 9, 2017
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Answers (1)
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What type of bond is formed when Beryllium and oxygen react
(Solved)
What type of bond is formed when Beryllium and oxygen react
Date posted:
November 9, 2017
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Answers (1)
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What are the optimum conditions of conversion of SO2 to SO3
(Solved)
What are the optimum conditions of conversion of SO2 to SO3
Date posted:
November 9, 2017
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Answers (1)
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(a) Noble gas are usually unreactive. Explain this phenomena. (b) Explain the meaning of the term ductility a property found in metals
(Solved)
(a) Noble gas are usually unreactive. Explain this phenomena.
(b) Explain the meaning of the term ductility a property found in metals
Date posted:
November 9, 2017
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Answers (1)
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What is a standard solution?
(Solved)
What is a standard solution?
Date posted:
November 9, 2017
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Answers (1)
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Compare the reactivity of chlorine and bromine
(Solved)
Compare the reactivity of chlorine and bromine
Date posted:
November 9, 2017
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Answers (1)
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Explain the following observation made by a form three student.(a) Dilute hydrochloric acid does not react with copper metal, but dilute nitric acid does
(Solved)
Explain the following observation made by a form three student.
a) Dilute hydrochloric acid does not react with copper metal, but dilute nitric acid does.
b) Describe briefly how one can distinguish Nitrogen (I) oxide from Nitrogen (II) oxide.
Date posted:
November 9, 2017
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Answers (1)
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When Iron is added to blue Copper (II) Sulphate, the solutions turns light green and a brown solid is precipitated.
(Solved)
When Iron is added to blue Copper (II) sulphate solution, the solution turns light green and a brown solid is precipitated.
a) Identify the type of reaction described above.
b)Explain the observations made
Date posted:
November 8, 2017
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Answers (1)
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State one factor that can determine stability of an atom.
(Solved)
State one factor that can determine stability of an atom.
Date posted:
November 8, 2017
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Answers (1)
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Name the products of electrolysis of fused copper (II) chloride using carbon electrodes. (i) Anode (ii) Cathode. Explain
(Solved)
Name the products of electrolysis of fused copper (II) chloride using carbon electrodes.
(i) Anode
(ii) Cathode
Explain
Date posted:
November 8, 2017
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Answers (1)
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Explain the following observations. (a)Aluminium is used in the manufacture of pans and sufurias. (b)Magnesium Oxide has a higher melting point than sodium oxide
(Solved)
Explain the following observations.
a)Aluminium is used in the manufacture of pans and sufurias.
b)Magnesium Oxide has a higher melting point than sodium oxide
c)Solid sodium chloride does not conduct electricity whereas molten sodium chloride does
Date posted:
November 8, 2017
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Answers (1)