Tag: environmental chemistry

Quizzes (17) Questions (41)

Questions Related to environmental chemistry

Multiple choice chemistry environmental chemistry biochemistry and the environment green chemistry strategies to control environmental pollution and green chemistry

Which of the following method of separation is used to separate heavier and lighter components of a mixture by wind or by blowing air?

  1. winnowing

  2. handpicking

  3. threshing

  4. sieving
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The method of separation that is used to separate heavier and lighter components of a mixture by wind or by blowing air is winnowing.

Multiple choice chemistry environmental chemistry biochemistry and the environment green chemistry strategies to control environmental pollution and green chemistry

Which of the following practices will not come under green chemistry?

  1. If possible, making use of soap made of vegetable oils instead of using synthetic detergents.
  2. Using $H _{2}O _{2}$ for bleaching purpose instead of using chlorine based bleaching agents.

  3. Using bicycle for travelling small distances instead of using petrol/diesel based vehicles.

  4. Using plastic cans for neatly storing substances.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Green chemistry is the different process and methods that helps in minimizing the effects of pollution and eliminating the hazardous substances. It takes care that no products adds to the environmental pollution. So using plastic cans does not come under green chemistry. 

Multiple choice chemistry environmental chemistry biochemistry and the environment green chemistry strategies to control environmental pollution and green chemistry

The humidity of a place

  1. lies between 10% - 20%

  2. is always more than 20%

  3. is always less than 80%

  4. varies from time to time
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Humidity is amount of water vapour present in air.It varies from place to place due variation in temperature and climate conditions.The ideal humidity for health and comfort is about $40-50$%.

Multiple choice chemistry environmental chemistry biochemistry and the environment green chemistry strategies to control environmental pollution and green chemistry

paraffin wax contains alkanes ranging from

  1. ${ C } _{ 3 }$ to ${ C } _{ 9 }$
  2. ${ C } _{ 10 }$ to ${ C } _{ 15 } $
  3. ${ C } _{ 16 }$ to ${ C } _{ 20 }$
  4. ${ C } _{ 21 }$ to ${ C } _{ 30 }$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Paraffin wax is a mixture of solid alkanes. It typically consists of long-chain hydrocarbons ranging from C21 to C30.

Multiple choice chemistry environmental chemistry biochemistry and the environment green chemistry strategies to control environmental pollution and green chemistry

Chlorofluorocarbons have been in use in refrigerators and air conditioners are proved to be unfriendly to the environment. Substitutes to these compounds which are friendly to the environment are:

  1. $CCl _2$
  2. $C{Cl} _3F$
  3. $CClF _2CClF _2$
  4. $CF _3CH _2F$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The first three compounds are chlorofluoro carbons which are harmful to ozone and unfriendly to the environment. These are used in refrigerators. so a compound called $CF _3CH _2F$ was discovered, which is friendly to the environment and used in refrigerators.

Multiple choice chemistry environmental chemistry biochemistry and the environment green chemistry strategies to control environmental pollution and green chemistry

The design, development and implementation of chemical products and process to reduce or eliminate the use and generation of substances hazardous to human health and environment is called ________ .

  1. Green Revolution

  2. Green Chemistry

  3. Environmental Chemistry

  4. Waste Management
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The design, development and implementation of chemical products and processes to reduce or eliminate the use and generation of substances hazardous to human health and environment, is called Green Chemistry.
Waste Management is all the activities and actions required to manage waste from its inception to its final disposal.
Environmental Chemistry is the scientific study of the chemical and biochemical phenomena that occur in natural places.
It should not be confused with Green Chemistry, which seeks to reduce potential pollution at its source.