Question

1. Suggest five measures each for conservation of electricity & water resources.

Answer 1

Ques1. On what chemical law, balancing of chemical equation is based?
Ques2. Give an example of photo chemical reaction.
Ques3. Name a reaction which forms insoluble salts.
Ques4. Explain the following in terms of gain and loss of oxygen with one example:a. Oxidationb. Reduction
Ques5. A copper coin is kept in a slotuion of silver nitrate for some time, what will happen to the coin and the colour of the solution?
Ques6. Why do we apply paint on iron articles?
Ques7. What happens chemically when quicklime is added to water?
Ques8. Name the types of reactions in the following:a. Garbage producing foul smellb. Burning of natural gasc. Carbon Dioxide gas passed through lime water
Ques9. Blue crystals of copper sulfate on heating in a dry test tube bocome colourless. Give reason.
Ques10. Why can not a chemical change be reversed normally?
Ques11. Can rusting of iron take place in distilled water?

Answer 2

Water is the major life source for all living forms and it is our responsibility to conserve it.  

• The water can be conserved in public places by,
• Collection of excess water and use it for other purposes.
• Close taps when not in use and installation of aerators.
• Report leakage and unnecessary spillage of water.
• Deploy rain water harvesting.  
• Create awareness to the people about water scarcity.

The world works on electricity and production of electricity is not simple.

Some of the measures are,

• Reduce and recycle.
• Conserve energy.
• Sharing of resources.
• Create awareness to the people about resource scarcity.
• Use of energy harnessed from the sun, water and wind.