CBSE Class 12-science Chemistry Oxygen
Achieve high marks in your Chemistry board exam with TopperLearning’s study resources. You can watch the CBSE Class 12 Science Chemistry The p-Block Elements – Oxygen video lessons to prepare for your exam. Learn the preparation methods and properties of oxygen through these well-prepared videos. Also, revise the uses of oxygen by going through our revision notes.
In addition, we have practice materials such as CBSE Class 12 Science Chemistry textbook solutions, sample papers and previous years’ papers to support you in your studies. You can also use our mock tests for self-assessment and revision of short answer questions, Chemistry multiple choice questions and other important questions.
- An aqueous solution of an inorganic compund X shows the following reactions (i) It decolorises an acdified KMNO4 solution with the evolution of O2. (ii) It liberates iodine from an acidified KI solution. (iii) It gives brown ppt with alkaline KMNO4 solution with the evolution of O2. (iv) It removes black stains from oil paintings. Identify X and give equations.
- Two gases A and B are allotropes. A is paramagnetic and B is diamagnetic. B is a powerful oxidizing agent than A. A is converted to B by silent electrical discharge. A is colorless while B is a pale blue gas. B reacts with blackened lead paintings to make them white. B converts colorless NO gas to brown gas C and A is also formed. Identify A,B and C and write the reactions involved.
- O3+ I- +H2O gives
- why CO and N2O are called neutral gas?
- Name the allotropic form of oxygen. What is the environment disturbance caused by oxygen and its isotope?
- Give reason H2S is a gas and H2O is liquid.
- Is the boiling point of hydrogen peroxide higher or lower than water?
- Water is an oxide of hydrogen. Comment on its nature.
- List the anomalous behavior of water and give reason for each.
- Write short note on the various types of oxides formed by oxygen.
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