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प्रश्न
What is meant by the metal reactivity series ? State its importance, (any two points).
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उत्तर
A list in which the metals are arranged in the decreasing order of their chemical reactivity is called the metal reactivity series.
Special features of the activity series:
- The ease with which a metal in solution loses electron(s) and forms a positive ion decreases down the series, i.e. from potassium to gold.
- Hydrogen is included in the activity series because, like metals do, it too loses an electron and becomes positively charged (H+) in most chemical reactions.
- The series facilitates the comparative study of metals in terms of the degree of their reactivity.
- The compounds of the metals (oxides, carbonates, nitrates and hydroxides) too can be easily compared.
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संबंधित प्रश्न
Write chemical equation for the event.
Aluminium came in contact with air.
State what is meant by the ‘reactivity series of metals’
Complete the statement by filling in the blank with the correct word:
The metal which reacts with steam and the reaction is reversible is ________.
Give a balanced equation for the following type of reaction:
A displacement reaction in which a metal above hydrogen in the reactivity series, displaces another metal from the solution of its compound.
Explain the following reaction with the balanced equation.
Sodium burns in air
Which of the following is the correct arrangement of the given metals in ascending order of their reactivity?
Zinc, Iron, Magnesium, Sodium
Which among the following statements is incorrect for magnesium metal?
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.
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.
