. Such substances are called biodegradable. In other words, combination reactions are exothermic. Rest are short answer questions. The first unit has total five chapters. Remaining questions are of short and long answer type.
For other answers visit to or or or go for Solutions. There are eleven questions in the chapter. Solution The non — biodegradable wastes persist in the environment for a long time and cause various problems. Small intestine is especially adapted for absorbing the digested food. These solutions are prepared by our subject experts in such a way that the students understand all the topics covered in the syllabus of class 10 science quite effectively. Environment Science part is covered in the Biology syllabus.
What is the role of toothpaste in preventing cavities? The position of image should be at 2 F. Enjoy learning with great experience. These can prove to be of great help for students to develop a strong foundational base in maths and science. Question 18: Why do we apply paint on iron articles? Solution No, the impact of removing all the organisms in a trophic level is same for different trophic levels. Candidates can study anytime, anywhere with the help of the short notes.
The third chapter will take us to the world of metals and non-metals where we will learn about their properties and reactions among them. The eleventh chapter is about the human eye and some optical phenomena in nature. Example: Mixture of sodium and chlorine to yield table salt. In the fifth question, we have to draw electron dot structures. Heating effect of electric current and its applications in daily life.
Induced potential difference, Induced current. These are to be answered in about 70 words each. Why does the solution of Magnesium chloride conduct electricity? Material medium Refractive index Material medium Refractive index Air 1. Chemical Reactions and Equations 2. The best thing about e-books is that we can read pdf material from anywhere, anytime by making our self-comfortable which is the main highlight of e-book. Biogeochemical cycle will stop, and ultimately whole biosphere will get disturbed.
However, as per the examination point of view, we can divide this book into three parts Physics, Chemistry and Biology. Also write the equation of photosynthesis and mark, as well as validate from which molecule the by-product is obtained. One-half of a convex lens is covered with a black paper. Why is diffusion insufficient to meet the oxygen requirements of Multicellular organisms like humans? What is the nature of the image obtained? Glucose during respiration inhalation of oxygen is oxidised with the liberation of energy as shown below: Thus, respiration is an exothermic process. The levels of this magnification will be different at different levels of the ecosystem.
Remaining questions are of short answer type. The comparative concentration of the water gives a signal to the brain which then takes the required corrective action of either reabsorbing water or releasing it. The Second unit consists of four chapters that are from sixth to ninth. Periodic Classification of Elements 6. Chapter 10 - Light- Reflection and Refraction There are seventeen questions in the chapter.
For example: In this reaction, calcium carbonate is obtained as a precipitate. Question 2: Why is the amount of gas collected in one of the test tubes in Activity 1. Chapter 13 - Magnetic Effects of Electric Current This chapter has total eighteen questions of which first five questions are of objective type. Question 3 Of these materials that are changed which once change the fastest? Solution If all the grazers are removed from grass lands, grass will grow unchecked. Solution i Terrestrial ecosystem: A natural forest, a crop field, etc. Some substances are inert and cannot upon by the microorganisms and do not breakdown into simple substances. For example: Here, the number of chlorine and hydrogen atoms are not equal on both sides.