Chapter 14: Ecosystem
1. Fill in the blanks.(a) Plants are called as————- because they fix carbon dioxide.(b) In an ecosystem dominated by trees, the pyramid (of numbers) is————- type.(c) In aquatic ecosystems, the limiting factor for the productivity is————- .(d)…
Chapter 14: Respiration in Plants
NCERT TEXTBOOK QUESTIONS FROM SOLVED 1. Give the schematic representation of an overall view of Krebs’ cycle.Solution: 2. Differentiate between(a) Respiration and Combustion(b) Glycolysis and Krebs’cycle(c) Aerobic respiration and FermentationSolution: (a) Differences between respiration and combustion are as…
Chapter 14: Environmental Chemistry
NCERT Class 11 Chemistry Texbook Chapter 14 Solved Questions Question 1. Define environmental chemistry?Answer: Environmental Chemistry is the branch of science which deals with the chemical changes in the environment. It includes our surroundings such as air, water,…
Chapter 13: Organisms and Populations
1. How is diapause different from hibernation?Ans: Diapause is a period of suspended growth or development occuring in many insects and other invertebrates during which metabolic activities are greatly reduced. On the other hand, hibernation is a sleep like…
Chapter 13: Photosynthesis in Higher Plants
1. By looking at a plant externally can you tell whether a plant is C3 or C4 ? Why and how?Solution: It is not possible to distinguish externally between a C3 and C4 plant, but generally tropical plants are adapted for…
Chapter 13: Hydrocarbons
Question 1. How do you account for the formation of ethane during chlorination of methane?Answer: Chlorination of methane is a free radical reaction which occurs by the following mechanism:From the above mechanism, it is evident that during propagation…
Chapter 12: Organic Chemistry Some Basic Principles and Techniques
Question 1. What are hybridisation states of each carbon atom in the following compounds? CH2=C=O, CH3CH=CH2, (CH3)2CO, CH2=CHCN, C6H6.Answer: Question 2. Indicate the a- and n-bonds in the following molecules:C6H6 , C6H12, CH2Cl2, CH=C=CH2, CH3NO2, HCONHCH3Answer: Question 3. Write…
Chapter 12: Biotechnology and its Applications
1. Crystals of Bt toxin produced by some bacteria do not kill the bacteria themselves because –(a) bacteria are resistant to the toxin(b) toxin is immature;(c) toxin is inactive;(d) bacteria encloses toxin in a special sac.Ans: (c) Toxin…
Chapter 12: Mineral Nutrition
1.’All elements that are present in a plant need not be essential to its survival’. Comment.Soln. Most of the mineral elements present in the soil enter plants through roots but all of these may not be essential for…
Chapter 15: Waves
NCERT Solutions for Class 11 Physics Chapter 15 Waves Question 15. 1. A string of mass 2.50 kg is under a tension of 200 N. The length of the stretched string is 20.0 m. If the transverse…
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