important questions on cbse class 12 chemistry

Important Questions Class 12 Chemistry Chapter 7 The p-Block Elements 1 Mark Questions

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1. Write the elements of group 15? Ans. The elements of group 15 are Nitrogen (N), Phosphorous (P) , Arsenic (As) , Antimony (Sb) and Bismuth (Bi). 2.  Write chemical name & formulae of a) Chile saltpetre b) Indian saltpetre Ans. (a) Chile saltpetre – Sodium nitrate –  (b) Indian saltpetre – Potasium nitrate –  3.  … Read more

Important Questions Class 12 Chemistry Chapter 2 Solutions 1 Mark Questions

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1. Define the term –solubility? Ans. The maximum amount of a substance that can be dissolved in a specified amount of solvent is called its solubility. 2. What is the effect of pressure on solubility of a gas? Ans. The solubility of a gas increases with increases of pressure. 3. State Henry’s Law. Ans. Henry’s Law states that … Read more

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