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प्रश्न
Fill in the following blank with suitable word:
Ordinary aluminium strips are not attacked by water because of the presence of a layer of ................. on the surface of aluminium.
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उत्तर
Ordinary aluminium strips are not attacked by water because of the presence of a layer of aluminium oxide on the surface of aluminium.
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संबंधित प्रश्न
A solution of CuSO4 in water is .................... in colour.
(a) Pink
(b) Blue
(c) Colourless
(d) Green
Metal A has electronic configuration (2, 8, 1) and metal B has (2, 8, 8, 2). Which is more reactive? Why? Identify these metals.
_________ solution is blue in colour.
(a) CuSO4
(b) FeSO4
(c) ZnSO4
(d) Al2(SO4)3
Show the formation of Na2O by the transfer of electrons.
Food cans are coated with tin and not with zinc because ______.
Name two metals which form amphoteric oxides.
Fill in the following blank with suitable word:
The white powder formed when magnesium ribbon burns in oxygen is of ....................
What is the nature of the oxide Na2O? What happens when it is dissolved in water? Write the chemical equation of the reaction involved.
Name two metals which can, however, liberate hydrogen gas from very dilute nitric acid.
What is the action of water on magnesium ? Write equation of the chemical reaction involved.
What happens when calcium reacts with water? Write the chemical equation of the reaction of calcium with eater.
Write the equation for the reaction of Iron with dilute hydrochloric acid.
Name the products formed. Also indicate the physical states of all the substances involved.
Hydrogen is not a metal but still it has been assigned a place in the reactivity series of metals. Why?
In a solution of lead acetate, a strip of metal M was dipped. After some time, lead from the solution was deposited on the metal strip. Which metal is more reactive, M or lead?
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?
If A, B, C, D, E, F, G, H, I, J and K represent metals in the decreasing order of their reactivity, which one of them is most likely to occur in a free state in nature?
Rewrite the following statement by selecting the correct option.
A solution of Al2(SO4)3 in water is _____________.
Write the chemical equation for the following reaction:
Cinnabar is heated in the presence of air.
Write the chemical equation for the following reaction:
Manganese dioxide is heated with aluminum powder.
Generally, metals are solid in nature. Which one of the following metals is found in liquid state at room temperature?
