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प्रश्न
Write a chemical equation to illustrate the use of aluminium for joining cracked railway lines.
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उत्तर
Aluminium is more reactive than iron and can be used for reducing iron oxide to iron. The equation for the same is:
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संबंधित प्रश्न
Write the electron-dot structures for sodium, oxygen and magnesium.
Name two metals which form amphoteric oxides.
Which of the following elements would yield a basic oxide.
Na, S, C, K, H
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Name two metals which can, however, liberate hydrogen gas from very dilute nitric acid.
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The elements whose oxides can turn phenolphthalein solution pink are:
(a) Na and K
(b) K and C
(c) Na and S
(d) K and P
A metal less reactive and another metal more reactive than hydrogen are:
(a) aluminium and lead
(b) iron and magnesium
(c) copper and tin
(d) copper and mercury
State and explain the reaction, if any, of the following metals with a solution of copper sulphate:
(a) Gold
(b) Copper
(c) Zinc
(d) Mercury
