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प्रश्न
Classify the following metals based on their reactivity.
Cu, Zn, Ca, Mg, Fe, Na, Li, Hg
| More reactive | Moderately reactive | Less reactive |
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उत्तर
| More reactive | Moderately reactive | Less reactive |
| Ca | Zn | Cu |
| Na | Mg | Hg |
| Li | Fe |
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संबंधित प्रश्न
Give one example each of which illustrates the following characteristics of a chemical reaction:
evolution of a gas
What do you observe when dilute sulphuric acid is added to granulated zinc?
What do you observe when ferrous sulphate solution is added to an aqueous solution of sodium hydroxide.
How will you obtain Zinc chloride from zinc.
Also give balanced equations for the reactions
Write chemical equation for the event.
Iron filings are dropped in aqueous solution of copper sulphate.
Write a chemical equation for the following event.
Zinc oxide is dissolved in dilute hydrochloric acid.
Divide the metals Cu, Zn, Ca, Mg, Fe, Na, Li into three groups, namely reactive metals, moderately reactive metals and less reactive 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.
Explain the following reaction with the balanced equation.
Sulphur burns in air
Observe the following diagram and identify the type of reaction and write observation.
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 alloys contain mercury as one of its constituents?
Compound X and aluminium are used to join railway tracks.
- Identify the compound X
- Name the reaction
- Write down its reaction.
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.
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.
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.
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.
