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प्रश्न
Write the molecular formulae of the following compound.
Sodium aluminate
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उत्तर
Sodium aluminate- NaAlO2
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संबंधित प्रश्न
Silver metal does not combine easily with oxygen but silver jewellery tarnishes after some time. How?
Name one metal which is extracted by:
Reduction with aluminium.
The rocky material found with ores is called ______.
Name the method by which aluminium metal is extracted.
What is meant by the ‘concentration of ore’?
The metal which can be extracted simply by heating the cinnabar ore in air is ______.
Name the following:
The substance added to get rid of gangue in the extraction of metal.
How many valence electrons are present in non- metals?
Define calcination.
Froth floatation process is generally used to concentrate ______ ores.
What is the difference between calcination and roasting?
Observe the given figure of reactivity series of metals and answer the following questions:
Reactivity series of metals
- Name two metals which react with water.
- Name two moderately reactive metals.
- Name the most highly reactive metal and the most less reactive metal.
Write the name.
Metals which are amphoteric in nature.
Write the molecular formulae of the following compound.
Cryolite
Explain the following reaction with the balanced equation.
Zinc carbonate is heated strongly in limited supply of air
Explain the following reaction with the balanced equation.
Zinc oxide is treated with carbon
The process in which a carbonate ore is heated strongly in the absence of air to convert it into metal oxide is called ____________.
Which of the following ore is concentrated by the Froth floatation process?
Assertion (A): The extraction of metals from their sulphide ores cannot take place without roasting the ore.
Reason (R): Roasting converts sulphide ores directly into metals.
