Tag: planet earth

Quizzes (17) Questions (116)

Questions Related to planet earth

Multiple choice chemistry water too little to waste pollution of water water pollution planet earth

Choose the correct statement(s).

  1. Aldrin is used as a pesticide.

  2. The maximum permissible limit of nitrate in water is 50 ppm.

  3. The maximum permissible limit of fluoride is 6 ppm.

  4. All of the above
Reveal answer Fill a bubble to check yourself
A,B Correct answer
Explanation

A) Aldrin is a pesticide used to control soil insects such as termites, corn rootworm, wireworms, rice water weevil and grasshoppers.
B) The maximum permissible limits for nitrite and nitrate are 10 ppm and 50 ppm respectively.
C) The maximum permissible limit of fluoride is 2 ppm.

Multiple choice chemistry water too little to waste pollution of water water pollution planet earth

Water pollution can be classified into chemical and thermal pollution.

Is the above statement correct?

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Water pollution caused due to the chemicals such as the chemical waste from the industries, chemicals used in agriculture such as pesticides, herbicides, etc. All these results in chemical water pollution.

Thermal water pollution is caused by the radioactive wastes that are emitted to the water which results in degradation of the water quality.

Multiple choice chemistry water too little to waste pollution of water water pollution planet earth

Rich in lather, mixed with oil, black-brown water that goes down the drains from ________ is dirty. It is called waste water.

  1. sinks

  2. toilets, showers

  3. laundries

  4. all of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

These type of waste water causes the water pollution. It usually gives negative impact on our environment and not good for aquatic life.

Multiple choice chemistry water too little to waste pollution of water water pollution planet earth

Water pollution can be defined as:

  1. Physical change in the properties of water

  2. Chemical change in the properties of water

  3. Biological change in the properties of water

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

There are various chemical pollutants which on mixing changes the colour, taste or other physical quality; changes the natural state of odourless, colourless form by bringing chemical changes and biological changes include an addition of pathogenic bacteria to the water by untreated sewage waste.

Multiple choice chemistry water too little to waste pollution of water water pollution planet earth

State whether the given statement is true or false:

The presence of harmful or objectionable material in sufficient quantity in water to measurably degrade its quality is called as water pollution.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
The above statement is true. The presence in water of harmful or objectionable material in sufficient quantity to measurably degrade water quality is called as water pollution.
Multiple choice chemistry water too little to waste pollution of water water pollution planet earth

Which of the following decides the standards for drinking water in Europe?

  1. European Environment Protection Agency

  2. European Drinking Water Directive

  3. European Union Standards

  4. European Safe Water Act
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Standards of drinking water in Europe is decided by European Drinking water directive.

Multiple choice chemistry water too little to waste pollution of water water pollution planet earth

If BOD value is greater than 17 ppm, then water belongs which of the following to category?

  1. Normal water

  2. Highly polluted water

  3. Usable water

  4. Slightly polluted water
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Clean water would have BOD value of less than 5 ppm whereas highly polluted water could have BOD value 17ppm or more.

Multiple choice chemistry water too little to waste pollution of water water pollution planet earth

Maximum prescribed limit of $Cu$ in drinking water is:

  1. 2 ppm

  2. 1 ppm

  3. 3 ppm

  4. 5ppm
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The Food and Nutrition Board(FNB) recommends dietary copper intakes for adults is 1.5-3.0 mg as Cu is an essential macronutrient. 

If excess Cu in drinking water can cause gastrointestinal tract disturbances and chronic ingestion can cause liver toxicity. 

Thus, the correct option is $C$