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प्रश्न
Which one of the following is not true of metal :
Metals are malleable and ductile
पर्याय
True
False
उत्तर
Metals are malleable and ductile - True
APPEARS IN
संबंधित प्रश्न
The process by which sulphide ore is concentrated.
In the extraction of aluminium: Write the function and formula of cryolite in the extraction of aluminium.
Name the most abundant metal in the earth's crust.
Name the chemical compound which is electrolysed in molten state to obtain sodium metal. Which gas is produced in this process?
A black metal oxide XO2 is used as a catalyst in the preparation of oxygen gas from potassium chlorate. The oxide XO2 is also used in ordinary dry cells. The metal oxide XO2 cannot be reduced satisfactorily with carbon to form metal X.
(a) Name the metal X.
(b) Name the metal oxide XO2.
(c) Which reducing agent can be used to reduce XO2 to obtain metal X?
(d) Name another metal which can also be extracted by the reduction of its oxide with the above reducing agent.
Which metal can be extracted from the following ore?
Calamine
State one observation for each of the following :
Copper sulphate solution is electrolysed using copper electrodes.
Write the name.
The molecular formula of main ore of aluminium –
Observe the figure and answer the following.
- Write the name of the method.
- What is used as anode and cathode in this method?
- Write the molecular formula and use of cryolite.
- Write anode reaction.
- Write cathode reaction.
Why should the metal sulphides and carbonates be converted to metal oxides in the process of extraction of metal from them?
