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प्रश्न
Write chemical equation for the event.
Aluminium came in contact with air.
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उत्तर
Aluminum came in contact with air.
Aluminum is a very reactive metal. The outer surface of the metal is actually covered by a very thin layer of oxide which keeps the metal protected from the air. But when the oxide layer is damaged, aluminum comes in contact with the air. It is easily attacked by air. Then aluminum starts reacting with the oxygen. It will burn as bright white flame to change into aluminum(III) oxide.
Chemical Equation:
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संबंधित प्रश्न
What do you observe when a few pieces of iron are dropped in a blue solution of copper sulphate?
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What do you observe when Magnesium ribbon is burnt in oxygen.
Write chemical equation for the event.
Iron filings are dropped in aqueous solution of copper sulphate.
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Electrolysis of alumina is done.
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Zinc oxide is dissolved in dilute hydrochloric acid.
With reference to Water explain with suitable examples of how the reactivity of the metals could be differentiated.
Complete the statement by filling in the blank with the correct word:
The metal which reacts with steam and the reaction is reversible is ________.
Explain the following reaction with the balanced equation.
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Explain the following reaction with the balanced equation.
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A metal that exists as a liquid at room temperature is obtained by heating its sulphide in the presence of air. Identify the metal and its ore and give the reaction involved.
Explain the following
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Of the three metals X, Y and Z. X reacts with cold water, Y with hot water and Z with steam only. Identify X, Y and Z and also arrange them in order of increasing reactivity.
Metal ‘A’ has electronic configuration 2, 8, 1 and metal ‘B’ has electronic configuration 2, 8, 8, 2. Out of these, which metal is more reactive? Write the reaction of this metal with dilute HCl acid.
Three metal samples of magnesium, aluminium and iron were taken and rubbed with sandpaper. These samples were then put separately in test tubes containing dilute hydrochloric acid. Thermometers were also suspended in each test tube so that their bulbs dipped in the acid. The rate of formation of bubbles was observed. The above activity was repeated with dilute nitric acid and the observations were recorded.
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(i) When the activity was done with dilute hydrochloric acid, then in which one of the test tubes was the rate of formation of bubbles the fastest and the thermometer showed the highest temperature?
(ii) Which metal did not react with dilute hydrochloric acid? Give reason.
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OR
Name the type of reaction on the basis of which the reactivity of metals is decided. You have two metals X and Y. How would you decide which is more reactive than the other?
