1) Who was the first governor general of India?
2) Why is anthracite the best type of coal?
3) Who is literate ?
4) Write two steps to be taken up for sustainable development.
5) Why is the blue colour of copper sulphate dissapear when zinc is added to it?
Answers
Answer:
1)waran hestings
3)a person who is well studied
hope helpful
Answer:
2. It has the highest carbon content, the fewest impurities, and the highest energy density of all types of coal and is the highest ranking of coals. Anthracite is the most metamorphosed type of coal (but still represents low-grade metamorphism), in which the carbon content is between 86% and 97%.
3.Literacy is popularly understood as an ability to read and write in at least one method of writing, an understanding reflected by mainstream dictionaries.
4.(i) Technology:(ii) Reduce, Reuse, and Recycle Approach:(iii) Promoting Environmental Education and Awareness:(iv) Resource Utilization as Per Carrying Capacity:(v) Improving Quality of Life Including Social, Cultural and Economic Dimensions:
5.The color of solution is due to ions, cupric ion is blue in color,zinc ion is colorless. when zinc granules are added to the solution of copper sulphate, zinc displaces copper to form zinc sulphate and thus copper get deposited. Thus blue colour of solution disappears.