Chaper-4. CARBON AND ITS COMPOUNDS
Q-1. Mrs. Anita observed that her cooking utensils are becoming black in colour and the flame of her gas stove is yellowish in colour what can be the reason for this sooty flame. How is this problem harmful for our environment? What steps should be taken to stop this process.
Ans: a).The inlets for air in stove get blocked which leads to yellow flame.
b). This problem is harmful for our environment as incomplete combustion results in the formation of oxides which are major pollutants of our environment.
c). For preventing this situation gas or stove burners should be cleaned time to time.
Associated Value : Eco-friendly habits will be inculcated among the learners
Q-2. Ethanol is used on a large scale at commercial level this is a very useful chemical. It is commonly called alcohol and is the active ingredient of alcoholic drink. But consumption of alcohol also causes drunkenness and this practice is Socially condemned. As a responsible student of class –X what steps you would take to discourage the use of alcohol.
Ans: By sensitizing the people about the harmful effects of liquor consumption.
By making poster, banners and writing articles on this issue.
By not getting attracted towards this habit and to stop my friends also to keep control on themselves to condemn alchololism.
Associated Value : The learners understand the bad effects of Alcoholism and also start try to discourage this practice in the society.
Q-3. You must have seen advertisements stating that some vegetable oils are healthy. Saturated fatty acids which are said to be harmful for health. Why vegetable oils are considered healthy then aturated fatty acids (ghee)? What precautions you would take in selecting a cooking oil.
Ans: Vegetable oils contain unsaturated fatty acids which are healthy and decrease the cholesterol level in our blood. That is why we should use vegetable oils for cooking. Cooking oil should be selected in such a manner that it should contain low cholesterol.
Associated Value : The learners will be able to adopt healthy food habits once they understand that animal fats produce more cholesterol than vegetable oil.
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I am a school teacher and serving CBSE students community since 1995.