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प्रश्न
Name the following:
The chief metal which occur in nature in free state as well as in combined state.
उत्तर
Copper and silver.
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संबंधित प्रश्न
Name the most common ore of the metal aluminium from which the metal is extracted. Write the chemical formula of the ore.
What is rust? Give the equation for the formation of rust ?
State on what special properties the use of each of these metals depends:
zinc
Explain
A neutral gas other than oxygen which is formed at the anode during electrolysis of fused alumina
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.
A tapping vessel opens in a tank-like container that is tapering on the lower side. The tank has an outlet for water on the upper side and a water inlet on the lower side. Finely ground ore is released in the tank. A forceful jet of water is introduced in the tank from lower side and gangue particles and pure ore are separated by this method.
- The above description is of which gravitation separation method?
- Draw a labelled diagram of this method.
Give reason for the following:
A neutral gas other than oxygen is formed at the anode during electrolysis of fused alumina.
Give composition and uses of the following alloys. Mention the reason for its use.
Brass
Give composition and uses of the following alloys. Mention the reason for its use.
Magnalium
What is added to steel to make it stainless steel?
