Class 11 Chemistry NCERT Solutions Chapter 8: Redox Reactions Question 1. Assign oxidation numbers to the underlined elements in each of the following species ; (a) NaH2PO4 (b) NaHSO4 (c) H4P2O7 (d) K2MnO4 (e) CaO2 (f) NaBH4 (g) H2S2O7 (h) KAl(SO4)2.12H2O Answer: Question 2. What are the oxidation numbers of the underlined elements in […]
Class 11 Chemistry NCERT Solutions Chapter 7: Equilibrium Question 1. A liquid is in equilibrium with its vapours in a sealed container at a fixed temperature. The volume of the container is suddenly increased, (i) What is the initial effect of the change on the vapour pressure ? (ii) How do the rates of
Class 11 Chemistry NCERT Solutions Chapter 6: Thermodynamics Question 1. Choose the correct answer. A thermodynamic state function is a quantity (i) used to determine heat changes (ii) whose value is independent of path (iii) used to determine pressure volume work (iv) whose value depends on temperature only. Answer: (ii) whose value is independent
Class 11 Chemistry NCERT Solutions Chapter 5: States of Matter Solids, Liquids and Gases Question 1. What will be the minimum pressure required to compress 500 dm3 of air at 1 bar to 200 dm3 at 30° C ? Answer: From the given data : P1 = 1 bar P2 = ? V1 = 500 dm3 V2 = 200 dm3 P1V1 =
Class 11 Chemistry NCERT Solutions Chapter 4: Chemical Bonding and Molecular Structure Question 1. Explain the formation of chemical bond. Answer: Inert gases or noble gas elements are present in group 18 also called zero group. This means that their valency is zero or their atoms can exist independently of their own. Let us
Class 11 Chemistry NCERT Solutions Chapter 1: Some Basic Concepts of Chemistry Question 1. Calculate the molecular mass of the following : (i) H2O (ii) CO2 (iii) CH4 Answer: (i) Molecular mass of H2O : 2 × 1 + 1 × 16 = 18u (ii) Molecular mass of CO2 : 1 × 12 + 2× 16 = 44
Class 8 Maths NCERT Solutions Chapter 10: Visualising Solid Shapes Ex – 10.1 Question 1. For each of the given solid, the two views are given. Match for each solid the corresponding top and front views. The first one is done for you. Solution. Question 2. For each of the given solid, the three
Class 11 Physics NCERT Solutions Chapter 5: Laws of Motion Question 1. Give the magnitude and direction of the net force acting on (a) a drop of rain falling down with a constant speed. (b) a cork of mass 10 g floating on water. (c) a kite skilfully held stationary in the sky. (d)
Class 11 Physics NCERT Solutions Chapter 6: Work, Energy and Power Question 1. The sign of work done by a force on a body is important to understand. State carefully if the following quantities are positive or negative: work done by a man in lifting a bucket out of a well by means of
Class 11 Physics NCERT Solutions Chapter 7: System of Particles and Rotational Motion Question 1. Give the location of the center of mass of a (i) sphere, (ii) cylinder, (iii) ring, and (iv) cube, each of uniform mass density. Does not the center of mass of a body necessarily lie inside the body? Answer: The
