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Electrolytic Refining of Copper

Give one exam...

Question

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

(b) Change of color

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Solution

(b) When blue coloured copper sulphate solution reacts with hydrogen sulphide gas, a black-coloured precipitate of copper sulphide is formed.

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Similar questions

Q. (a) What is meant by chemical reaction? Explain with the help of an example.
(b) Give one example each of a chemical reaction characterised by:
(i) evolution of a gas
(ii) change in colour
(iii) formation of a precipitate
(iv) change in temperature
(v) change in state.

Give an example of each of the following chemical changes.

(a) A reaction involving.

(i) Change of state.

(ii) Formation of the precipitate.

(b) An exothermic and an endothermic reaction involving carbon as one of the reactants.

(c) A reaction where the colour change is noticed.

Question 20

Give an example of a chemical reaction for each of the following situations:
(a) A change in colour is observed.
(b) A gas is evolved
(c) Sound is produced.

(a) Give one example of a chemical reaction.

(b) State two characteristics of the chemical reaction which takes place when dilute sulphuric acid is poured over zinc granules.

(c) Give two characteristics of the chemical reaction which occurs on adding potassium iodide solution to lead nitrate solution.

Explain giving one example for each of the following chemical changes :

(a) Double decomposition

(b) Thermal dissociation

(c) Reversible reaction

(d) Displacement reaction

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Electrolytic Refining of Copper

Standard X Chemistry

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