Tag: water too little to waste

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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 $C$

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

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

  1. 1 ppm

  2. 10 ppm

  3. 4 ppm

  4. 5 ppm
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
$\Rightarrow$  Zinc is one of the important trace elements that play a vital role in the physiological and metabolic process of many organisms. Nevertheless, higher concentrations of zinc can be toxic to the organism. 
$\Rightarrow$  It plays an important role in protein synthesis and is a metal which shows fairly low concentration in surface water due to its restricted mobility from the place of rock weathering or from the natural sources. 
$\Rightarrow$  According to the standards maximum prescribed limit of $Zn$ in drinking water is $5\,ppm$
Multiple choice chemistry water too little to waste pollution of water water pollution planet earth

Which of the following Bacteria is responsible for the Gastrointestinal Disease?

  1. E. coli

  2. S. Faecalis
  3. Both $A$ and $B$

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

Gastrointestinal diseases refer to diseases involving the gastrointestinal tract, namely the esophagus, stomach, small intestine, large intestine and rectum, and the accessory organs of digestion, the liver, gallbladder, and pancreas.

E. coli (Escherichia coli) is the name of a germ, or bacterium,that lives in the digestive tracts of humans and animals. There are many types of E. coli, and most of them are harmless. But some can cause bloody diarrhea.

Enterococcus faecalis – formerly classified as part of the group D Streptococcus system – is a Gram-positive, commensal bacterium inhabiting the gastrointestinal tracts of humans and other mammals

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

Environmental pollution refers to:

  1. peeling of top soil

  2. dissipation of energy

  3. release of toxic/undesirable materials in environment

  4. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Pollution is the release of harmful substances or energy into the environment by man in quantities that damage health and resources. The polluted air is undesirable for breathing, for the condition of buildings and monuments exposed to it or for animal and plant life. The polluted soil and land undesirable for raising food and fodder for animals or for recreation and aesthetic enjoyments.