heredity class 10 important questions 2020
(c) 500 kJ (iii) chloroplast (a) At noon, the Sun appears white because the light from the Sun is directly over head and travel relatively shorter distance. In this diagram, the angle of incidence, the angle of emergence and the angle of deviation respectively, are [CBSE2014] Question 7. (b) Only II male reproductive part so, it cannot get fertilised. (d) resistor will get heated up and its value will change. Therefore, after the formation of four bonds, carbon attains the electronic configuration of neon. (c) Benzene molecule contains alternate single and . Four students traced the path of light ray after refraction through the lens. (c) I, II and III (c) Khadins and Bhundhis are the traditional rain harvesting systems used in Rajasthan and Madhya Pradesh, Uttar Pradesh, respectively. Question 14. (iii) hydrogen Question 3. When crystals of lead nitrate are heated strongly in a dry test tube Which of the following is not the correct method to make permanent magnets? Thus, an ecosystem consists of biotic components including all living organisms and abiotic components constituting physical factors like temperature, rainfall, wind, soil and minerals. (b) The reaction mixture turns milky High BOD indicates that water is polluted. Answer: (d) Cake, wood and grass. (d) III and IV. (b) the colour of solution fades away (b) Heat energy cannot be recycled, it gets lost in the environment. Heredity and Evolution Class 10 Extra Questions with Answers Science Chapter 9 October 15, 2020 September 25, 2020 by Laxmi In this page, you can find CBSE Class 10 Science Chapter 9 Extra Questions and Answers Heredity and Evolution Pdf free download, NCERT Extra Questions for Class 10 Science will make your practice complete. Question 9. Class 10th science syllabus is significantly wide enough. (d) The far point of his eyes has receded away (d) a yellow residue is left. (d) mirror is convex and lens is concave. (d) It produces a large quantity of raw materials for industry. (a) dilute sulphuric acid reacts with zinc granules Answer: I. large number of spores. New species may be formed if (c) the electricity content of water increases with height The refractive index of medium B relative to A will be [NCERT Exemplar] (a) water A specific gene is located on a particular chromosome in individuals of a given species. Answer: (b) 330 mA (c) 12 mL The change in focal length of eye lens is caused by action of [NCERT] Answer: (a) Rajendera Singh (b) Lead battery manufacturing factory (b) Each step of food chain form a trophic level. II. (a) carboxylic acid (b) I and II Answer: (i) carbon dioxide and water (b) 6 As, I = V/R = 4.5/4.5 = 1A Answer: (d) Alcohol distillery. To prepare further for Class 10 Science subject you can get Revision Notes, Important Questions at aglasem.com for free. Dilute hydrochloric acid is added to granulated zinc taken in a test tube. (c) ciliary muscles (c) Wind energy farms can be located only in vast open areas located in favourable wind conditions as the minimum velocity for a windmill to functions is 11-16 km/h and is called as cut in speed. Answer: (b) pH paper So, the energy available at the producer level will be 5000 kJ. (a) Lactic acid is formed by the breakdown of pyruvate when oxygen is insufficient in muscles instead of forming C02 and water. Answer: (a) The N-pole of the resultant magnet is on the face close to A because, the magnetic field lines enter in loop from B and come out from A. When a magnesium ribbon is burnt in air, the ash formed is (a) thinking (a) Mineral acids are strong acids which ionise almost completely and carboxylic acids are weak acids which ionise only pardally. (c) Ciliary muscles contract and extend in order to change the lens shape for focussing image ayretina. (c) Silicon (2, 8, 4) Write word equations and then balanced equations for the reaction taking place when (c) displacement reaction (b) Only (ii) (a) I and IV (b) Sustainable development encourages development for current generation and conservation of resources for future generations (d) All the above. (c) convex Question 7. Which of the following limits the number of trophic levels in a food chain? (b)Pungent smelling, brown fumes are evolved due to NO2 gas and brown coloured residue of lead oxide (PbO) is left. I. Question 10. Q-3.How many chapters are in class 10 science and which is the most important chapter? (b) Butanol, CH3âCH2âCH2âCH2âOH Answer: (d) Chandi Prasad Bhatt. Which of the following does not belong to the same homologous series? 5.If the student just takes one look at the question, they can see if it is time-consuming or easy to solve. (c) Archaeopteryx is a connecting link- between the reptiles and birds. (d) they are all multicellular. (b) less than unity It appears like a bird, but has other features which are present in reptiles, e.g. The NCERT Book lessons have been provided here with complete explanations from beginning to end. double bonds. (d) Boron (2, 3) (b) The population of grass decreases. (d) Glycerine. An example of homologous organs is [NCERT] Which one of the following statements is/are correct? (d) KMnO4 is an unstable compound and decomposes in the presence of FeSO4 to a colourless compound. Answer: Answer: (a) A has recently become extinct (a) its temperature increases e.g. (d) Plants convert solar energy into chemical energy.