For the given setup, which of the following observations is/are correct?

I. Occurence of decomposition reaction
II. Evolution of sulphur dioxide
III. Evolution of hydrogen gas
IV. Occurence of displacement reaction

I and III

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II and IV

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III only

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III and IV

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Solution

The correct option is D III and IV

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Similar questions

Which of the following observations helps to determine whether a chemical reaction has taken place or not?

(i) Change in state.

(ii) Change in colour.

(iii) Change in shape

(iv) Evolution of gas.

(v) Change in temperature.

H C l

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