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प्रश्न
Name the following:
Two metals which occur in nature in free state as well as in combined state.
उत्तर
platinum and gold
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संबंधित प्रश्न
The most common ore of iron is ________. (Calcium / Haematite)
How is concentrated ore changed to oxide?
Explain with reason:
Electrolytic reduction is done to obtain aluminium?
State the use of:
cast iron
From the metals: copper iron, magnesium, sodium and zinc, select a different metal in each case
which:
for not react with cold water but reacts with steam when heated.
Give reason for the following:
Galvanized metal ions should not be used for storing food.
What is an alloy? Give three reasons why alloys are made.
State the main components of the following alloy:
Duralumin
Aluminium powder is used in thermite welding because
Name the following :
The process of coating of iron with zinc.
