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प्रश्न
Metal A burns in air, on heating, to form an oxide A2O3 whereas another metal B burns in air only on strong heating to form an oxide BO. The two oxides A2O3 and BO can react with hydrochloric acid as well as sodium hydroxide solution to form the corresponding salts and water.
- What is the nature of oxide A2O3?
- What is the nature of oxide BO?
- Name one metal like A.
- Name one metal like B.
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उत्तर
- The oxide A2O3 is amphoteric, which can react with both acids and bases to form a salt and water.
- The oxide BO is amphoteric, which can react with both acids and bases to form a salt and water.
- Aluminium is a metal like A, which forms Al2O3 on reacting with oxygen.
- Zinc is a metal like B that forms ZnO upon strong heating in air (oxygen).
APPEARS IN
संबंधित प्रश्न
_________ solution is blue in colour.
(a) CuSO4
(b) FeSO4
(c) ZnSO4
(d) Al2(SO4)3
Name the following:
Metals which forms an amphoteric oxide.
Give reasons why copper is used to make hot water tanks and not steel (an alloy of iron).
A solution of _________________ in water is green in colour.
(a) CuSO4
(b) FeSO4
(c) ZnSO4
(d) Al2(SO4)3
What changes in the colour of iron nails and copper sulphate solution do you observe after keeping the iron nails dipped in copper sulphate solution for about 30 minutes?
Name the metal which has been placed just below copper in the reactivity series.
How would you show that silver is chemically less reactive than copper?
With the help of examples, describe how metal oxides differ from non-metal oxides.
Why does aluminium not react with water under ordinary conditions?
What is the action of water on aluminium? Write the equation of the chemical reaction involved.
What happens when calcium reacts with water? Write the chemical equation of the reaction of calcium with water.
Write the equation for the reaction of:
Magnesium with dilute hydrochloric acid.
Name the products formed in the given case. Also indicate the physical states of all the substances involved.
Name one metal more reactive than hydrogen.
The least reactive metal among the following is:
CuSO4(aq) + Fe(s) → FeSO4(aq) + Cu(s)
FeSO4(aq) + Zn(s) → ZnSO4(aq) + Fe(s)
On the basis of the above reactions, indicate which is most reactive and which is least reactive metal out of zinc, copper and iron.
In nature, metal A is found in a free state while metal B is found in the form of its compounds. Which of these two will be nearer to the top of the activity series of metals?
What is the cause of chemical bonding (or chemical combination) of atoms of elements?
Explain the following:
Reactivity of aluminium decrease if it is dipped in nitric acid.
Where does the metal aluminium, used in the thermit process, occurs in the reactivity series of metals?
Write the chemical equation for the following reaction:
Cinnabar is heated in the presence of air.
