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प्रश्न
Zinc sulphide : Roasting : : zinc carbonate : _______
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उत्तर
Zinc sulphide : Roasting : : zinc carbonate : calcination
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संबंधित प्रश्न
Metallic oxides of zinc, magnesium and copper were heated with the following metals.
| Metal | Zinc | Magnesium | Copper |
| Zinc oxide | – | – | – |
| Magnesium oxide | – | – | – |
| Copper oxide | – | – | – |
In which cases will you find displacement reactions taking place?
Name the most abundant metal in the earth's crust.
Fill in the following blank with suitable word:
Bronze is an alloy of copper and .........
Describe with one example, how moderately reactive metals (which are in the middle of reactivity series) are extracted.
Name the chemical compound which is electrolysed in molten state to obtain aluminium metal. Which gas is evolved during this process?
What iron compound is present in haematite ore? Also write its chemical formula.
Name one ore of aluminium. Name the aluminium compound present in this ore and write its chemical formula.
Which metal can be extracted from the following ore?
bauxite
Which metal can be extracted from the following ore?
Calamine
Give reasons, why aluminum is used in:
wrapping chocolates
How an ore is concentrated by froth floatation process?
Which one of the following is not true of metal :
Metals are malleable and ductile
Which one of the following is not true of metal :
Metals form non-polar covalent compounds
Which one of the following is not true of metal :
Metal will have 1 or 2 or 3 electrons in their valence shell.
Usually ______ ores are subjected to ______ which is done in the absence of air.
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.
_______ is the least reactive metal.
Explain Bayer’s process.
