In the above image, an experiment is being performed where 2 g ferrous sulphate crystals are taken in a dry boiling tube. The colour of the ferrous sulphate crystals is noted down. After that the boiling tube is heated over the flame of a burner and the colour of the crystal is noted down. Based on the above experiment answer the questions given below.
1. What was the initial colour of the ferrous sulphate crystals ?
(i) Green
(ii) White
(iii) Brown
(iv) Red
2. What was the colour of the ferrous sulphate crystals after heating ?
(i) Green
(ii) White
(iii) Brown
(iv) Red
3. Which of the following type of reaction takes place inside boiling tube ?
(i) Decomposition reaction
(ii) Percipitation reaction
(iii) Displacement reaction
(iv) Combination reaction
4. Which of the following is not the type of a decomposition chemical reaction?
(i) Thermal
(ii) Electrical
(iii) Displacement
(iv) Photo
5. Ferrous sulphate crystals decomposes into which of the following compound(s)?
(i) Ferric oxide
(ii) Sulphur dioxide
(iii) Sulphur trioxide
(iv) All of the above
