 Class 9 Science NCERT Solutions Chapter 9: Force and Laws of Motion Question 1. Which of the following has more inertia ? (a) a rubber ball and a stone of the same size ? (b) a bicycle and a train ? (c) a five rupee coin and a one- rupee coin ? (CBSE 2011, 2013) […]
Class 9 Science NCERT Solutions Chapter 8: Motion Question 1. An object has moved through a distance. Can it have zero displacement ? If yes, support your answer with an example. (CBSE 2015) Answer: Yes, The displacement of the object can be zero. Let a boy completes one round of a circular track in 5
 Class 9 Science NCERT Solutions Chapter 7: Diversity in Living Organisms Question 1. Why do we classify organisms ? (CCE 2012) Answer: Identification is not possible without any system of classification. Classification helps in bringing out similarities and dissimilarities amongst organisms. Relationships are built up with the help of classification. They indicate the evolutionary pathways.
 Class 9 Science NCERT Solution Chapter 6: Tissues Question 1. What is a tissue ? Answer: Tissue is a group of related cells that have a common origin and perform a common function. Question 2. What is the utility of tissues in multicellular organisms ? Answer: Division of Labour: Tissues bring about division of
 Class 9 Science NCERT Solutions Chapter 5: The Fundamental Unit of Life Question 1. Who discovered cell, and how ? Answer: Robert Hooke (1665). He thinly pared a piece of cork and observed it under his self made primitive microscope. The scientist found that cork possesses a number of small box-like structures which he named
 Class 9 Science NCERT Solutions Chapter 4: Structure of the Atom Question 1. What are canal rays ? Answer: Canal rays also called anode rays, are seen moving from the anode towards the cathode in the specially designed discharge tube. However, they do not originate from the anode. Question 2. If an atom contains one
 Class 9 Science NCERT Solutions Chapter 3: Atoms and Molecules Question 1. In a reaction, 5.3 g of sodium carbonate reacted with 6.0 g of ethanoic acid. The products were 2.2 g of carbon dioxide, 0.9 g of water and 8.2 g of sodium ethanoate. Show that these observations are in agreement with the law
Class 9 Science NCERT Solutions Chapter 2: Is Matter Around Us Pure Question 1. What is meant by a pure substance? Answer: In terms of science, a pure substance may be defined as a single substance or matter which cannot be separated into other kinds of matter by any physical process. All pure elements and
 Class 9 Science NCERT Solutions Chapter 1: Matter in Our Surroundings Question 1. Which of the following are matter ? Chair, air, love, smell, hate, almonds, thought, cold, cold drink, smell of perfume. Answer: Chair, air, smell, almonds, cold drink, smell of perfume are matter. Please note that the smell whether pleasant or foul is
 Class 9 Maths NCERT Solutions Chapter 15: Probability Ex – 15.1 Question 1. In a cricket match, a batswoman hits a boundary 6 times out of 30 balls she plays. Find the probability that she did not hit a boundary. Solution: Since, batswoman plays 30 balls, therefore total number of trials is n(S) = 30.
