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प्रश्न
Complete the incomplete statement with missing word:
Non-metals form acidic oxides while metals form ______.
उत्तर
Non-metals form acidic oxides while metals form basic oxides.
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संबंधित प्रश्न
Name the gas in air which tarnishes silver articles slowly.
Give reasons, why aluminum is used in:
In aluminiothermy
Identify the process given in following passage and draw neat labelled diagram showing the process.
Electrolysis of molten mixture of alumina (melting point > 20000C) is done in a steel tank. The tank has a graphite lining on the inner side. This lining does the work of a cathode. A set of graphite rods dipped in the molten electrolyte works as anode. Cryolite (Na3AlF6) and fluorspar (CaF2) are added in the mixture to lower its melting point upto 10000C.
How are metals refined by the electrolytic methods?
The following question relate to the extraction of aluminium by electrolysis.
Give the equation for the reaction which takes place at the cathode.
State three objectives achieved during the roasting of ores.
Usually ______ ores are subjected to ______ which is done in the absence of air.
Explain the reactions of nonmetals with water with the help of examples.
Explain in brief types of extraction of moderately reactive metals according to their reactivity.
Give the reaction involved during extraction of zinc from its ore by
- roasting of zinc ore
- calcination of zinc ore
