Tag: strategies to control environmental pollution and green chemistry

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Questions Related to strategies to control environmental pollution and green 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 done with the help of bullocks?

  1. Threshing

  2. handpicking

  3. winnowing

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

Threshing is the process of loosening the edible part of grain (or other crop) from the husks and straw to which it is attached. It is the step in grain preparation after reaping and before winnowing, which separates the grain from the chaff.

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

Green chemistry involves ?

  1. production of chemicals of our daily use from green house gases

  2. such chemical processes in which green plants are used

  3. those reaction which are of biological origin

  4. use of non-toxic reagents and solvents to produce environment friendly products.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Green chemistry is a design of products and process that reduces or eliminates the use of harmful hazardous products. It uses the concept of invention and design and invokes to produce products that are environment-friendly.

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

Soil is a natural medium for growth of land plants. Organic soil contains organic number upto a depth of

  1. Two and a half feet

  2. One foot

  3. Six inches

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

Organic soil contain organic number upto a depth of two and half feet, this is also known as human or upper layer of soil.

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.