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प्रश्न
Which of the two metals is more reactive?
Copper or silver
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उत्तर
Copper is more reactive than silver.
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संबंधित प्रश्न
_________ solution is blue in colour.
(a) CuSO4
(b) FeSO4
(c) ZnSO4
(d) Al2(SO4)3
Name two metals which form amphoteric oxides.
Give reasons for the following:
Blue colour of copper sulphate solution is destroyed when iron filings are added to it.
Complete and balance the following equation:
\[\ce{Cu(NO3)2_{(aq)} + Zn_{(s)} ->}\]
Ordinary aluminium strips are not attacked by water because of the presence of a layer of ______ on the surface of aluminium.
What happens when magnesium reacts with very dilute nitric acid? Write an equation for the reaction involved.
Can we keep sodium immersed under water? Why?
Describe the reaction of potassium with water. Write the equation of the reaction involved.
What happens when calcium reacts with water? Write the chemical equation of the reaction of calcium with water.
Hydrogen is not a metal but still it has been assigned a place in the reactivity series of metals. Why?
One of the following is not a neutral oxide. This is:
The elements whose oxides can turn litmus solution blue are ______.
The elements whose oxides can turn litmus solution red are ______.
Zinc oxide is a metal oxide. Which of the following term best describes the nature of zinc oxide:
\[\ce{CuSO4_{(aq)} + Fe_{(s)} -> FeSO4_{(aq)} + Cu_{(s)}}\]
\[\ce{FeSO4_{(aq)} + Zn_{(s)} -> ZnSO4_{(aq)} + Fe_{(s)}}\]
On the basis of the above reactions, indicate which is most reactive and which is least reactive metal out of zinc, copper and iron.
When calcium metal is added to water, the gas evolved does not catch fire but the same gas evolved on adding sodium metal to water catches fire. Why is it so?
A zinc plate was kept in a glass container having CuSO4 solution. On examining it was found that the blue colour of the solution is getting lighter and lighter. After a few days, when the zinc plate was taken out of the solution, a number of small holes were noticed in it. State the reason and give chemical equation of the reaction involved.
Calcium floats over water during the reaction with water. Give reason.
Explain the following:
Reactivity of aluminium decrease if it is dipped in nitric acid.
Write the chemical equation for the following reaction:
Cinnabar is heated in the presence of air.
