When blue crystals of ferrous sulphate (FeSO₄.7H₂O) are heated, then 7 water molecules are lost & anhydrous ferrous sulphate is formed.
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As we know that -rainbow is caused by “Dispersion of Sunlight” by tiny water droplets present in the atmosphere which is one of the applications of dispersion of light.
Class 10th Science Session 2022-23 Class 10 Science Terminal Exams MCQ Solutions Class X Science MCQ Extra Questions Answers 10th Science Terminal Exam Based MCQ Extra Questions
(i) copper displace iron (ii) blue colour of copper sulphate solution is obtained (iii) reaction is exothermic (iv) no reaction takes place
When silver chloride, AgCl is placed in sunlight for some time, then silver chloride changes into grey coloured silver metal & chlorine gas. 2AgCl (s) + Sunlight → 2Ag(s) + Cl₂ (s)