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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
Write the steps involved in the extraction of pure metals in the middle of the activity series from their carbonate ores.
In the extraction of aluminium: Draw the diagram for the extraction of aluminium.
Name the most abundant metal in the earth's crust.
A zinc ore gave CO2 on treatment with a dilute acid. Identify the ore and write its chemical formula.
How is zinc extracted from its carbonate or (calamine)? Explain with equations.
Name one ore of mercury. Which mercury compound is present in this ore? Write its chemical formula.
Which of the following is an iron ore?
(a) cinnabar
(b) calamine
(c) haematite
(d) rock salt
Rock salt is an ore of one of the following metals. This metal is:
(a) Mn
(b) Na
(c) Fe
(d) Cu
Which metal can be extracted from the following ore?
Haematite
Aluminum is used in thermite welding:
what is ignition mixture?
Define the following term.
Mineral
State one observation for each of the following :
Copper sulphate solution is electrolysed using copper electrodes.
Answer the following questions based on the extraction of aluminium from alumina by Hall - Heroult’s Process :
Why is powdered coke sprinkled on top of the electrolyte?
Explain the following:
Galvanization protects iron from rusting.
X is an element in the form of a powder. X burns in oxygen and the product is soluble in water. The solution is tested with litmus. Write down only the word which will correctly complete each of the following sentences:
(a) If X is a metal, then the litmus will turn ______.
(b) If X is a non-metal, then the litmus will turn ______.
(c) If X is a reactive metal, then ______ will be evolved, when X reacts with dilute sulphuric acid.
(d) If X is a non -metal, it will form _ oxide, which will form ______ solution with water.
(e) If X is a non -metal, it will not conduct electricity unless it is carbon in the form of ______.
State the property of the metal being utilized in the following :
| Use of metal | Property |
| Zinc in Galvanization | |
| Aluminium in Thermite welding |
Define calcination.
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.
Explain the characteristics of ionic compounds.
The given reaction shows one of the processes to extract the metals like Iron and Manganese.
\[\ce{MnO2(s) + Al(s) -> Mn(l) + Al2O3(s) + Heat}\]
Give a reason why Aluminium is preferably used in thermite reactions.
