Chapter 16: Chemistry in Everyday Life
16.1. Sleeping pills are recommended by doctors to the patients suffering from sleeplessness but it is not advisable to take its doses without consultation with the doctor. Why?Ans: Most of drugs taken in doses higher than recommended may…
Chapter 9: Biomolecules
NCRT TEXTBOOK QUESTIONS SOLVED 1. What are macromolecules? Give examples.Solution: Macromolecules are large high molecular weight substances with complex molecular structure and occur in colloidal state (being insoluble) in intracellular fluid. These are formed by polymerization of large…
Chapter 12: Thermodynamics
NCERT Solutions for Class 11 Physics Chapter 12 Thermodynamics Question 12. 1 A geyser heats water flowing at the rate of 3.0 litres per minute from 2 7°C to 77°C. If the geyser operates on a gas…
Chapter 8: Human Health and Disease
1.What are the various public health measures, which you would suggest as safeguard against infectious diseases?Ans. The various public health measures against infectious diseases includes the following –1.Education – People should be educated about the infectious diseases so that…
Chapter 15: Polymers
15.1. What are polymers?Ans: Polymers are high molecular mass substances (103 — 107u) consisting of a very large number of simple repeating structural units joined together through covalent bonds in a linear fashion. They are also called macromolecules. Ex:…
Chapter 8: Cell The Unit of Life
NCRT TEXTBOOK QUESTIONS SOLVED 1.Which of the following is not correct?(a) Robert Brown discovered the cell.(b) Schleiden and Schwann formulated the cell theory.(c) Virchow explained that cells are formed from pre-existing cells.(d) A unicellular organism carries out…
Chapter 8: Redox Reaction
Question 1. Assign oxidation number to the underlined elements in each of the following species:Answer: Question 2. What are the oxidation number of the underlined elements in each of the following and how do you rationalise your…
Chapter 11: Thermal Properties of matter
NCERT Solutions for Class 11 Physics Chapter 11 Thermal Properties of matter Question 11. 1. The triple points of neon and carbon dioxide are 24.57 K and 216.55 K respectively. Express these temperatures on the Celsius and…
Chapter 1: Matter in Our Surroundings
NCERT Solutions For Class 9 Science Chapter 1 Matter in Our Surroundings IN-TEXT QUESTIONS SOLVED NCERT Textbook for Class 9 Science – Page 3Question 1. Which of the following are matter?Chair, air, love, smell, hate, almonds, thought,…
Chapter 10: A Strange Wrestling March
Exercise (Page 46) 1.What was Vijay Singh’s weakness? Which awkward situation did it push him into?Ans: Vijay Singh was a wrestler. He was proud of his physical strength. His chief weakness was that he was boastful. He wanted…
