It is defined as the change in the normal properties of water by the presence of foreign material. Water has a property to dissolve a large number of substances. This property is a major causes of pollution It can also be defines as Water pollution may be defined as the addition of inorganic, organic or other harmful substances, which alter the quality of water so that it becomes harmful to man and other organisms.
Water Pollutants : The substances that contaminate or pollute water are called water pollutants. The presence of pollutants can be recognized by the following :
1. Bad taste of drinking water.
2. Offensive odour from lakes, rivers and ocean beaches.
3. Unchecked growth of aquatic weeds in water bodies.
4. Decrease in number of fish in fresh water, river water, sea water, etc.
5. Oil and grease floating on water surface.
A sudden build-up of Water Pollution : When some industrial accidents take place, then there is a sudden build-up of pollution in the environment.
Pollution of water is caused by | |||
Right Option : D | |||
View Explanation |
Which of the following are correct : (a) The substances that contaminate or pollute water are called water pollutants. (b) Waste water released from factories contains several harmful chemicals.
| |||
Right Option : C | |||
View Explanation |
Polluted water causes AIDS. True or False | |||
Right Option : B | |||
View Explanation |
About Abhyas metholodology the teachers are very nice and hardworking toward students.The Centre Head Mrs Anu Sethi is also a brilliant teacher.Abhyas has taught me how to overcome problems and has always taken my doubts and suppoeted me.
One of the best institutes to develope a child interest in studies.Provides SST and English knowledge also unlike other institutes. Teachers are co operative and friendly online tests andPPT develope practical knowledge also.
Abhyas Methodology is very good. It is based on according to student and each child manages accordingly to its properly. Methodology has improved the abilities of students to shine them in future.
It has a great methodology. Students here can get analysis to their test quickly.We can learn easily through PPTs and the testing methods are good. We know that where we have to practice
Being a parent, I saw my daughter improvement in her studies by seeing a good result in all day to day compititive exam TMO, NSO, IEO etc and as well as studies. I have got a fruitful result from my daughter.
Abhyas is a complete education Institute. Here extreme care is taken by teacher with the help of regular exam. Extra classes also conducted by the institute, if the student is weak.
My experience with Abhyas is very good. I have learnt many things here like vedic maths and reasoning also. Teachers here first take our doubts and then there are assignments to verify our weak points.
It was good as the experience because as we had come here we had been improved in a such envirnment created here.Extra is taught which is beneficial for future.
My experience was very good with Abhyas academy. I am studying here from 6th class and I am satisfied by its results in my life. I improved a lot here ahead of school syllabus.
It was a good experience with Abhyas Academy. I even faced problems in starting but slowly and steadily overcomed. Especially reasoning classes helped me a lot.