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 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
Class 11 Physics NCERT Solutions Chapter 8: Gravitation Question 1. Answer the following: (a) You can shield a charge from electrical forces by putting it inside a hollow conductor. Can you shield a body from the gravitational influence of nearby matter by putting it inside a hollow sphere or by some other means? (b)
Class 11 Physics NCERT Solutions Chapter 15 : Waves Question 15. 1. Â A string of mass 2.50 kg is under a tension of 200 N. The length of the stretched string is 20.0 m. If the transverse jerk is struck at one end of the string, how long does the disturbance take to reach
Class 11 Physics NCERT Solutions Chapter 10: Mechanical Properties of Fluids Question 10. 1. Explain why (a) The blood pressure in humans is greater at the feet than at the brain. (b) Atmospheric pressure at a height of about 6 km decreases to nearly half of its value at the sea level, though
Class 11 Physics NCERT Solutions Chapter 14: Oscillations Question 14. 1. Which of the following examples represent periodic motion? (a) A swimmer completing one (return) trip from one bank of a river to the other and back. (b) A freely suspended bar magnet displaced from its N-S direction and released. (c) A hydrogen molecule
