Chapter 11: If I Were You
NCERT Textbook Questions I. Answer these questions. Question 1.“At last a sympathetic audience.” Answer: Question 2.Why does the intruder choose Gerrard as the man whose identity he wants to take on?Answer:The intruder chose Gerrard as the man…
Chapter 10: Kathmandu
NCERT Textbook Questions Thinking about The Text(Page 131) Activity Question 1.On the following map mark out the route, which the author thought of but did not take, to Delhi.Answer:Route ¡s shown by dotted line Question 2.Find out…
Chapter 15: Communication Systems
15.1 Which of the following frequencies will be suitable for beyond-thehorizon communication using sky waves?(a) 10 kHz(b) 10 MHz(c) 1 GHz(d) 1000 GHz 15.2 Frequencies in the UHF range normally propagate by means of:(a) Ground waves.(b) Sky…
Chapter 14: Semiconductor
14.1 In an n-type silicon, which of the following statement is true:(a) Electrons are majority carriers and trivalent atoms are thedopants.(b) Electrons are minority carriers and pentavalent atoms are thedopants.(c) Holes are minority carriers and pentavalent atoms…
Chapter 18: Pollution of Air And Water
Pollution of Air and Water Class 8 Science NCERT Textbook Questions Question 1.What are the different ways in which water gets contaminated?Answer:Following are the ways by which water gets contaminated: Question 2.At an individual level, how can…
Chapter 13: Nuclei
13.1 (a) Two stable isotopes of lithium 6 3 Li and 7 3 Li have respectiveabundances of 7.5% and 92.5%. These isotopes have masses 6.01512 u and 7.01600 u, respectively. Find the atomic mass of lithium. (b)…
Chapter 17: Stars and The Solar System
Stars and The Solar System Class 8 Science NCERT Textbook Questions Choose the correct answer in Questions 1-3.Question 1.Which of the following is NOT a member of the solar system?(a) An asteroid(b) A satellite(c) A constellation(d) A…
Chapter 16: Light
Light Class 8 Science NCERT Textbook Questions Question 1.Suppose you are in a dark room. Can you see objects in the room? Can you see objects out¬side the room? Explain.Answer:When we are in a dark room then…
Chapter 15: Some Natural Phenomena
Some Natural Phenomena Class 8 Science NCERT Textbook Questions Select the correct option in Questions 1 and 2.Question 1.Which of the following cannot be changed easily by friction?(a) A plastic scale(b) A copper rod(c) An inflated balloon(d)…
Chapter 14: Chemical Effects of Electric Current
Chemical Effects of Electric Current Class 8 Science NCERT Textbook Questions Question 1.Fill in the blanks.(a) Most liquids that conduct electricity are solutions of ______ , ______ and ______(b) The passage of an electric current through a…
