CLASS: X NCERT (CBSE) Chemistry Periodic Classification of Elements
Periodic Classification of Elements Class-X Question & Answer
CLASS: X :: Carbon and its Compounds :: Question & Answer
CLASS: X :: Carbon and its Compounds :: Question & Answer Carbon and its Compounds Class-X Question & Answer
CLASS: X :: Metals and Non-metals :: Question & Answer
CLASS: X :: Metals and Non-metals :: Question & Answer 3 Metals and Non-metals
CLASS: X :: Acids, Bases and Salts :: Question & Answer
CLASS: X Acids, Bases and Salts Question & Answer Question (1): Define the terms: Acid, alkali and salt. Answer: An acid is a compound, which releases hydronium ions (H3O+) as the only positive ions in solution. An alkali is a compound, which releases hydroxyl ions (OH-) as the only negative ions in solution. A salt is one of the...
CLASS: X :: Chemical Reactions and Equations :: Question & Answer
CLASS: X NCERT (CBSE) SCIENCE Chemical Reactions and Equations Question & Answer Question 1:Define a chemical change. Answer: A chemical change is a permanent, not easily reversible change in which the identity of the substance is altered to produce one or more new substances. Question 2:Give four examples of a chemical change. Answer:...
CLASS: IX :: Sound
CLASS: IX NCERT (CBSE) PHYSICS Sound Question 1: When a wave travels through a medium ______. 1. particles are transferred from one place to another 2. energy is transferred in a periodic manner 3. energy is transferred at a constant speed 4. none of the above statements is applicable Answer: 3 Question 2: The minimum distance between the source and the reflector, so that an echo is heard is...
CLASS: IX :: Work and Energy
CLASS: IX NCERT (CBSE) PHYSICS Work and Energy Question (1): Work done = Force x _______ 1. distance 2. acceleration 3. velocity 4. speed Ans: 1 Question (2): 1 joule = 1 _______ 1. N m2 2. 3. N m 4. N2 m2 Ans: 3 Question (3): Which form of energy does the flowing water possess? 1. gravitational energy 2. potential energy 3. electrical energy 4. kinetic energy Ans: 4 Question (4): A body of mass 2 kg is dropped...
