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प्रश्न
Name the following:
Two metals which are found in the free or native state.
उत्तर
Gold and Platinum.
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संबंधित प्रश्न
Name the method by which aluminium metal is extracted.
Name one ore of sodium. Name the sodium compound present in this ore and write its chemical formula.
Give the name of one ore of iron. Which iron compound is present in this ore? Write its chemical formula.
Which of the following metals can be obtained from haematite ore?
(a) copper
(b) sodium
(c) zinc
(d) iron
Which of the following metals are extracted by the electrolysis of their molten chlorides?
(a) Na and Hg
(b) Hg and Mg
(c) Na and Mg
(d) Cu and Fe
Define calcination.
Bauxite reacts with sodium hydroxide in the Bayer’s process.
Which of the following ore is concentrated by the Froth floatation process?
An alloy is
Electrical wires have a coating of an insulting material. The material, generally used is
