Tag: chemistry

Questions Related to chemistry

The largest wind-energy farm in India is located ____________.

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

  1. near Kanyakumari in Tamilnadu

  2. near Faridabad in Delhi

  3. near Warangat at in Telangana

  4. none of these

Show answer
Correct Option: A
Explanation:

The largest wind-energy farm in India is located near Kanyakumari in Tamilnadu.

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

chemistry environmental chemistry biochemistry and the environment green chemistry strategies to control environmental pollution and 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.

Show answer
Correct Option: D
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. 

The climate of Kerala is very:

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

  1. hot

  2. wet

  3. hot and wet

  4. none of these

Show answer
Correct Option: C
Explanation:

Kerala, which lies in the tropic region, is mostly subject to the type of humid tropical wet climate experienced by most earth's rain-forest.


Hence, option C is correct.

The climate of Rajasthan is:

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

  1. cold and dry

  2. cold and wet

  3. hot and dry

  4. hot and wet

Show answer
Correct Option: C
Explanation:

Rajasthan keeps varying throughout the state. In the desert areas, it is usually hot and dry in summer and cold during the winters.  | | --- | | |

The humidity of a place

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

  1. lies between 10% - 20%

  2. is always more than 20%

  3. is always less than 80%

  4. varies from time to time

Show answer
Correct Option: D
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 $40-50$%.

paraffin wax contains alkanes ranging from

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

  1. ${ C } _{ 3 }$ to ${ C } _{ 9 }$

  2. ${ C } _{ 10 }$ to ${ C } _{ 15 } $

  3. ${ C } _{ 16 }$ to ${ C } _{ 20 }$

  4. ${ C } _{ 21 }$ to ${ C } _{ 30 }$

Show answer
Correct Option: D

Which of the following gas is used in bleaching of paper?

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

  1. Hydrogen peroxide

  2. Sulphur dioxide

  3. Methane

  4. None of the above

Show answer
Correct Option: A
Explanation:

Alkaline hydrogen peroxide is used as a strong bleaching agent due to the oxidation state of $-1$ in the compound.

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:

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

  1. $CCl _2$

  2. $C{Cl} _3F$

  3. $CClF _2CClF _2$

  4. $CF _3CH _2F$

Show answer
Correct Option: D
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.

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 ________ .

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

  1. Green Revolution

  2. Green Chemistry

  3. Environmental Chemistry

  4. Waste Management

Show answer
Correct Option: B
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.

Which of the following reaction occur when urea is added to soil as a fertilizer?

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

  1. $NH _{ 2 }CONH _{ 2 }\longrightarrow HNCO+NH _{ 3 }$

  2. $N{ H } _{ 2 }CON{ H } _{ 2 }+{ H } _{ 2 }O\longrightarrow 2N{ H } _{ 3 }+C{ O } _{ 2 }$

  3. $2NH _{ 2 }CONH _{ 2 }\longrightarrow H _{ 2 }NCONHCONH _{ 2 }+NH _{ 3 }$

  4. Both 1 and 2

Show answer
Correct Option: B
Explanation:

Urea is a major fertilizer used worldwide. It provides nitrogen to the soil by decomposing to ammonia and $CO _2$ when acted on by urease, an enzyme in soils. Then, ammonia is taken by the plants.


$N{ H } _{ 2 }CON{ H } _{ 2 }+{ H } _{ 2 }O\longrightarrow 2N{ H } _{ 3 }+C{ O } _{ 2 }$

Hence the correct option is B.