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Observe the following diagram and identify the type of reaction and write observation. - Science and Technology 1

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प्रश्न

Observe the following diagram and identify the type of reaction and write observation.

संक्षेप में उत्तर
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उत्तर

  1. The type of reaction occurring in the given diagram is displacement reaction.
    \[\ce{\underset{\text{Iron}}{Fe_{(s)}} + \underset{\text{Copper sulphate}}{CuSO_{4(aq)}} -> \underset{\text{Ferrous sulphate}}{FeSO_{4(aq)}} + \underset{\text{Copper}}{Cu_{(s)}}}\]
  2. Observations:
  • The blue colour of the solution will turn to green in test tube A and copper coating will form on iron nail because iron displaces copper from copper sulphate.
  • The reaction will not occur in test tube B because iron is more reactive than copper.
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अध्याय 8: Metallugy - Answer the Following

संबंधित प्रश्न

Give one example each of which illustrates the following characteristics of a chemical reaction:

evolution of a gas


How will you obtain  Silver chloride from silver nitrate.

Also give balanced equations for the reactions


How will you obtain Zinc chloride from zinc.

Also give balanced equations for the reactions


Write chemical equation for the event.

Electrolysis of alumina is done.


Divide the metals Cu, Zn, Ca, Mg, Fe, Na, Li into three groups, namely reactive metals, moderately reactive metals and less reactive metals.


State what is meant by the ‘reactivity series of metals’


With reference to Acid explain with a suitable example 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.

Sodium burns in air


Explain the following reaction with the balanced equation.

Reaction of aluminium with oxygen


Explain the following reaction with the balanced equation.

Magnesium reacts with dil HCl


Which of the following is the correct arrangement of the given metals in ascending order of their reactivity?

Zinc, Iron, Magnesium, Sodium


Compound X and aluminium are used to join railway tracks.

  1. Identify the compound X
  2. Name the reaction
  3. Write down its reaction.

An element A reacts with water to form a compound B which is used in white washing. The compound B on heating forms an oxide C which on treatment with water gives back B. Identify A, B and C and give the reactions involved.


A solution of CuSO4 was kept in an iron pot. After few days the iron pot was found to have a number of holes in it. Explain the reason in terms of reactivity. Write the equation of the reaction involved.


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.


An element A burns with golden flame in air. It reacts with another element B, atomic number 17 to give a product C. An aqueous solution of product C on electrolysis gives a compound D and liberates hydrogen. Identify A, B, C and D. Also write down the equations for the reactions involved.


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.

Answer the following questions:

(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.

(iii) Why is hydrogen gas not evolved when a metal reacts with dilute nitric acid? Name the ultimate products formed in the reaction.

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?


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