Short Q&A for Redox Reactions (Class 11 NCERT) Part 1: Basic Definitions and Oxidation Number Q. No. Question Answer 1 What is the historical definition of Oxidation? Addition of oxygen or removal of hydrogen. 2 What is the historical definition of Reduction? Removal of oxygen or addition of hydrogen. 3 What is the modern definition of Oxidation (electron concept)? Loss of electrons. 4 What is the modern definition of Reduction (electron concept)? Gain of electrons. 5 What is a Redox Reaction? A reaction in which both oxidation and reduction occur simultaneously. 6 What is an Oxidising Agent (or Oxidant)? The substance that accepts electrons and causes the oxidation of another substance. 7 What is a Reducing Agent (or Reductant)? The substance that donates electrons and causes the reduction of another substance. 8 Does an oxidising agent get oxidised or reduced? It gets Reduced. 9 Does a reducing agent get oxidised or reduced? It gets Oxidised. 10 Define Oxidation Number (O.N...

Over 110 Short Q&A for Chemical and Ionic Equilibrium (Class 11 NCERT) Part 1: Chemical Equilibrium (General Concepts) Q. No. Question Answer 1 Define a Reversible Reaction. A reaction that can proceed in both forward and reverse directions. 2 What is a State of Chemical Equilibrium? The state where the rate of the forward reaction equals the rate of the reverse reaction. 3 Is chemical equilibrium static or dynamic? Dynamic (reactions continue, but concentrations remain constant). 4 How is the Equilibrium Constant (K) expressed in terms of concentration? Kc​ (Concentration in mol L−1). 5 How is the Equilibrium Constant (K) expressed in terms of partial pressure? Kp​ (Pressure in bar or atm). 6 Write the relationship between Kp​ and Kc​. Kp​=Kc​(RT)Δng​. 7 What does Δng​ represent in the Kp​ and Kc​ relationship? (Moles of gaseous products) - (Moles of gaseous reactants). 8 When is Kp​=Kc​? When Δng​=0. 9 Does the magnitude of K indicate the speed of a reaction? No, K indicates ...