(c) Sarovar dam canal Tehnidamenal Answer the following questions in about one word or one sentence (1x xplam why element of the same period have deterrent properties? 1 Why do aluminium sheets not corrode easily 13 What is the normal blood pressure of human? W Name the type of mirror used in solar furnace? 15. What is accommodation? I Why does a magnetic compass deflect when brought near current carrying conductor? (6x2 12 Answer the following questions in about 20-30 words. 1 What are antacids? Explain the role in providing relief from stomach ache Baler what does one mean by exothermic and endothermic reaction? Give examp 19. Write two functions of Lymphs * Why does the sun appear reddish early in the morning? Poge -20% 21 What is biogas? Write the main composition of biogas 22 Define sustainable management of resources (3x9 Answer the following questions in about 40-60 words, the following statement into chemical equation and balance ther
Answers
Answer:
1) because the number of valence electrons in their outermost shells differ.
2) because it reacts with atmospheric oxygen to form a thin protective layer of aluminium oxide over it that prevents it from corrosion.
3) concave mirror
4)Accommodation is all about making room — it can mean a room or place where you will stay or an agreement about sharing something. ... When you are accommodating someone, you are making room for them or special circumstances for them.
5)current carrying wire always produces a magnetic field around it
6)An antacid is a substance which neutralizes stomach acidity and is used to relieve heartburn, indigestion or an upset stomach. Some antacids have been used in the treatment of constipation and diarrhea. Currently marketed antacids contain salts of aluminum, calcium, magnesium, or sodium
7) Exothermic reactions : Reactions in which heat is given out along with the products are called exothermic reactions.
Example :CH_4(g) + 2O_2 (g) \rightarrow CO_2 (g) + 2H_2O (g)
Endothermic reactions:Reactions in which energy is absorbed are known as endothermic reactions.
Example : The process of photosynthesis.
6CO_2 (g) +6H_2O(g)\rightarrow C_6H_1_2O_6(aq) + 6O_2 (g)
8) The long wavelength of the light that comes through the Earth is red colour.
9)Composition of Biogas
Biogas mainly comprises of three main gases. It is a mixture of methane, hydrogen, and carbon dioxide. It can be produced by agricultural waste, food waste, animal dung, manure, and sewage. The process of biogas production is also known as anaerobic digestion.
10)Sustainable resource management means managing resources in a way that their sources are not depleted; so that the future generations can also benefit from it. A renewable resource can be used again and again, so is more sustainable, eg water, wind, wood, sun and wave energy.
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