Chapter 15: Our Environment
Question 1Which of the following groups contain only biodegradable item ?(a) Grass, flowers and leather(b) Grass, wood and plastic(c) Fruit peels, cake and lime juice(d) Cake, wood and grassAnswer:(a) Grass, flowers and leather. Question 2Which of the…
Chapter 4: Chemistry Chemical Bonding and Molecular Structure
1. Explain the formation of a chemical bond. Ans: A chemical bond is defined as an attractive force that holds the constituents (atoms, ions, etc.) together in a chemical species. Various theories have been suggested for the…
Chapter 7: System of Particles and Rotational Motion
Question 7. 1. Give the location of the centre of mass of a (i) sphere, (ii) cylinder, (iii) ring, and (iv) cube, each of uniform mass density. Does the centre of mass of a body necessarily lie…
Chapter 5: The Fundamental Unit of Life
Question 1. Differentiate between homogeneous and heterogeneous mixtures with examples.Answer: Question 2. How are sol, solution and suspension different from each other?Answer: Question 3. To make a saturated solution, 36 g of sodium chloride is dissolved in…
Chapter 3: Biology Human Reproduction
1. Fill in the blanks:(a)Humans reproduce————— (asexually/sexually).(b)Humans are————— (oviparous, viviparous,ovoviviparous).(c)Fertilization is————— in humans (external/internal).(d)Male and female gametes are—————(diploid/haploid).(e)Zygote is————— (diploid/haploid).(f)The process of release of ovum from a mature follicle is called————— .(g)Ovulation is induced by a hormone…
Chapter 3: Plant Kingdom
NCERT TEXTBOOK QUESTIONS SOLVED 1.What is the basis of classification of algae?soln. Fritsch (1935), has classified algae considering phylogeny, affinities and inter-relationships of various forms. He classified algae mainly on the basis of the characters like structure of…
Chapter 3: Periodicity in Properties and Classification of Elements
1. What is the basic theme of organisation in the periodic table? Ans : The primary idea of the periodic table’s organisation is to organise elements into periods and groups based on their qualities. This arrangement simplifies…
Chapter 6: Work Energy and Power
Question 6. 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:(a) Work done by a man in lifting a bucket…
Poem Chapter 2: Wind
NCERT Textbook Questions Thinking about the poem(Page 31) I.Question 1.What are the things the wind does in the first stanza?Answer:The wind breaks the doors of the window, scatters the papers and throws down the books on the…
Poem Chapter 4: The Lake Isle Of Innisfree
NCERT Textbook Questions Thinking about the poem(Page 54) I.Question 1.What kind of place is Innisfree? Think about: Answer: Innisfree is a beautiful place where nature is in its frill swing. Question 2.By now you may have concluded…
