NCERT Class 12 Chemistry Model Paper Discussion
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2024-25 NCERT Model Exam Question Paper:
2024-25 NCERT Model Exam Paper Solution
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Section – D
Question No. 31
31.
a. A purple colour compound A, which is a strong oxidising agent and used for bleaching of wool, cotton, silk and other textile fibres, was added to each of the three test tubes along with H₂SO₄. It was followed by strong heating.
In which of the above test tubes; A, B or C:
(i) Violet vapours will be formed
(ii) The bubbles of gas evolved will extinguish a burning matchstick.
Write an equation for each of the above observations.
Quiz based on the video
Please send your answers in the comments column.
1. Oxidizing agent undergoes _______ reaction. 2. Acidified potassium permanganate is reducing agent. True or false. 3. What is the molecular formula of potassium permanganate? 4. Define oxidation in terms of electron. 5. Decrease some oxidation number is _______.6. _______ occurs at anode. 7. Oxising agent supplies _______.8. The colour of potassium permanganate crystal is _______.9. What is the colour of iodine vapour? 10. What is the molecular formula of oxalic acid? 11. What is the oxidation number of iodine in potassium iodide? 12. What is the oxidation number of iodine molecule? 13. Iodide becomes iodine molecule. It is _____ reaction.14. Which gas is used as fire extinguisher.15. Gain of electron is called _______.16. How many moles of carbon dioxide is released when oxalic acid reacts with acidified KMnO4.17. What is the oxidation number of manganese in potassium permanganate? 18. Write down the balanced reaction of acidified potassium permanganate with oxalic acid. 19. Write down the balanced reaction of acidified potassium permanganate with potassium iodide.20. Ion electronic method is also called ____.
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