Occurrence of Metals and Non-metals in Nature
Chemistry ⇒ Metals and Non-metals
Occurrence of Metals and Non-metals in Nature starts at 6 and continues till grade 12.
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Describe the difference between minerals and ores.
Describe the occurrence of chlorine in nature.
Describe the occurrence of hydrogen in nature.
Explain why aluminium is not found in a free state in nature.
Explain why iron is usually found as an oxide or sulphide in nature.
Explain why noble gases are found in a free state in nature.
Explain why sodium and potassium are never found in a free state in nature.
Name one non-metal that is found in both solid and gaseous forms in nature.
Which of the following is a major source of copper?
(1) Bauxite
(2) Galena
(3) Chalcopyrite
(4) Hematite
Which of the following is a non-metal that is essential for respiration?
(1) Nitrogen
(2) Oxygen
(3) Sulphur
(4) Chlorine
Which of the following is NOT a common form in which metals occur in nature?
(1) Sulphides
(2) Oxides
(3) Nitrates
(4) Chlorides
Which of the following is NOT a non-metal?
(1) Sulphur
(2) Phosphorus
(3) Magnesium
(4) Nitrogen
Fill in the blank: The main ore of copper is __________.
Fill in the blank: The main ore of iron is __________.
Fill in the blank: The main ore of lead is __________.
Fill in the blank: The main ore of silver is __________.
Ores are minerals from which metals can be extracted profitably. True or False?
State whether the following statement is True or False: Metals like gold and platinum are found in nature in their native state because they are less reactive.
True or False: All metals are found in nature as oxides.
True or False: Most metals are found in nature as pure elements.
