Advertisements
Advertisements
Questions
Write a chemical equation for the event.
Iron filings are dropped in aqueous solution of copper sulphate.
Iron dissolved in aqueous solution of copper sulphate.
Explain the following reaction with the balanced equation.
Ferrous dissolved in aqueous solution of copper sulphate.
Advertisements
Solution
More reactive iron pushes copper out of the copper sulphate solution when iron filings are added. Reddish-brown copper metal coats the iron filings, and ferrous sulphate is created as the blue colour of copper sulphate gradually disappears.
\[\ce{Fe_{(s)} + \underset{Blue}{CuSO4_{(aq)}} -> \underset{Colourless}{FeSO4_{(aq)}} + \underset{Copper}{{Cu}_{(s)}}}\]
APPEARS IN
RELATED QUESTIONS
What do you observe when ferrous sulphate solution is added to an aqueous solution of sodium hydroxide.
What is meant by the metal reactivity series ? State its importance, (any two points).
Write chemical equation for the event.
Aluminium came in contact with air.
Write chemical equation for the event.
Electrolysis of alumina is done.
State what is meant by the ‘reactivity series of metals’
With reference to Water explain with suitable examples of how the reactivity of the metals could be differentiated.
With reference to Acid explain with a suitable example of how the reactivity of the metals could be differentiated.
Give a balanced equation for the reversible catalytic reaction involving nitrogen as one of the reactants.
Classify the following metals based on their reactivity.
Cu, Zn, Ca, Mg, Fe, Na, Li, Hg
| More reactive | Moderately reactive | Less reactive |
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
Explain the following reaction with the balanced equation.
Sulphur burns in air
Which among the following alloys contain mercury as one of its constituents?
A metal M does not liberate hydrogen from acids but reacts with oxygen to give a black colour product. Identify M and black coloured product and also explain the reaction of M with oxygen.
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.
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.
Arrange the following as per the instruction given in the bracket:
Al, K, Mg, Ca (decreasing order of its reactivity)
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?
