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प्रश्न
Choose the correct answer from the options given below:
The metal is a liquid at room temperature.
विकल्प
Potassium
Zinc
Gold
Mercury
उत्तर
Mercury
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संबंधित प्रश्न
Which metal becomes black in the presence of hydrogen sulphide gas in air?
Why does a new aluminium vessel lose shine so soon after use?
How is zinc extracted from its carbonate or (calamine)? Explain with equations.
Manganese metal is extracted from manganese dioxide by a reduction process by making use of:
(a) carbon
(b) hydrogen
(c) electrolysis
(d) aluminium
State three objectives achieved during the roasting of ores.
The following question relate to the extraction of aluminium by electrolysis.
Give the equation for the reaction which takes place at the cathode.
Name the following:
A compound which is added to lower the fusion temperature of the electrolytic bath in the extraction of aluminium.
Usually ______ ores are subjected to ______ which is done in the absence of air.
Aluminium oxide is _______ oxide.
Write the name.
The molecular formula of main ore of aluminium –
