UGC NET Paper 1 2023 | Most Repeated Questions from Environment | Toshiba Mam | BYJU'S EXAM PREP

[@byjusexamprepugcnetset]

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[@parulsingh2100]

Thanks for class please continue and more classes

[@indumathi2531]

difference between BOD and COD : Biological Oxygen Demand is amount of oxygen needed during decomposition of organic matter like dead animals and plants, wood etc., Chemical Oxygen Demand is quantity of oxygen needed to oxide total organic matter. COD is better than BOD because it measures both organic and inorganic components. thank you for bringing conceptual questions..

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[@toshibashukla77]

😃 great!

[@NISHUBIOLOGY]

है,जटिल यदि प्रश्न तो उत्तर भी उत्तम आएगा। हो रहा संघर्ष अगर जीत का हुंकार गगनभेदी हो जाएगा।🙏

[@pallavisharma3414]

Gud noon mam

[@byjusexamprepugcnetset]

Good noon Pallavi.

[@jyotisoni7180]

Toshuu ❤❤❤❤ Cod पानी मे कुल कार्बनिक पदार्थ के ऑक्सीकरण के लिए आवश्यक ऑक्सीजन की मात्रा है , bod कार्बनिक पदार्थ के विघटित करते हुए वैक्टीरियाकी खपत ऑक्साजन की मात्रा है bod की जाँच का तरीका 5210 b है extra ans 😀😀🙈🌶🌶🌶🌶🌶🌶🌶🌶 क्लास,laptop कंप्यूटर नेटवर्क kisi ko नज़र ना लगे❤

[@byjusexamprepugcnetset]

Nice

[@mayankbhaskar7109]

Thanks mam

[@byjusexamprepugcnetset]

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[@vaishalisharma2122]

I have done msc in chemistry. May I give the net exam in Environment science?

[@servantsofprophetmuhammads2538]

Mam I want to teach at Byjus how to apply

[@surajsabale3522]

Chemical Oxygen Demand (COD) The amount of oxygen that is required for the chemical oxidation of the organic and inorganic chemicals present in the wastewater by utilising oxidising agents like Potassium permanganate, Potassium dichromate etc. is called as chemical oxygen demand (COD). The presence of COD facilitates rapid chemical oxidation of organic matter without any additional equipment. This is the only method that enables to determine the organic load in heavy toxic sewage. To determine COD, the sample water is taken in a closed container and incubated with a strong oxidant like potassium dichromate with sulphuric acid under standard conditions of temperature and time. COD is the oxygen demand that is consumed by both inorganic and organic matter present in the wastewater sample. The chemical oxygen demand is expressed as the mass of oxygen consumed over the volume of the solution. Its SI unit is milligrams per liter (mg/l). Biological Oxygen Demand (BOD) The standard BOD test determines the amount of oxygen required by the micro-organisms for the decomposition of the bio-degradable matter present in the wastewater sample under 5 days of aerobic condition at a temperature of 20 degree Celsius. It is measured in mg/l. BOD is determined for designing treatment facilities. It is used to determine the size of activated sludge units and trickling filter units. It is also used to determine the efficiency of various treatment units.

[@toshibashukla77]

So amazing 👏👏👏

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[@upendrabahuguna]

parkinsan apsenss to dopameen

[@morningstar3025]

Cod is better than bod because it can easily break harmful pollutants of industries in less time due to chemical reactions

[@toshibashukla77]

No, there is no time factor theory here. Research kariye aur thoda

[@byjusexamprepugcnetset]

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[@sandhyakurmi3248]

HW answer- biological Oxygen Demand. Thank you ma'am

[@byjusexamprepugcnetset]

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[@Dipsudha243]

H.W ANSWER - Biological Oxygen Demand(BOD) measures the amount of oxygen required by the aerobic organisms to decompose the organic matter. Chemical Oxygen Demand (COD) measures the oxygen required to decompose organic and inorganic constituents present in the waste water by chemical reaction . So, the value of COD is greater than BOD. Very very very enjoyable and effective session ma'am. Thank you so much ma'am for this valuable session and for your valuable teaching with your valuable guidance.😊🙏🙏💐💐

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[@vijetakumari1754]

Good afternoon mam

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[@classyfashiondesign2909]

Mam pls tell me how study for jrf mam im homemaker and mother also small baby how prepare pls mam tell me i need ur help mam pls reply krna

[@jyotisoni7180]

Yt जनता तुम लोगो को बहुत ठंड लग रही हैं ना हम mp वाले के यहाँ तो मार्च जून चल रहा है, mam की तबियत खराब के बाद भी क्लास ले इतने अच्छे qs कराये thnaku तक बोलते नही बनता hw ना करो स्वार्थी सब के सब जहाँ कंवल मैं हो वहाँ बाल्टी भर पानी गिरे सो अब आलसीयो

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Booster

[@nishasingh1332]

D

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[@kabitahandique9750]

G20 udaipur

[@beautycroma2589]

Mama I have request.. WB set january 8 tarik. So plss ak marathan karaia WB set k lia. Please maam please🙏.

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[@toshibashukla77]

Pakka next week se

[@aadueru3322]

Thank you soo much man very very helpful for examination 🤗🥰👍

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[@classyfashiondesign2909]

Target kha s learn krna h

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Mam will reply soon Meanwhile try out Byjus exam prep doubt section where you will get assured resolution from faculty within 24 hours

[@toshibashukla77]

Which target? Its under COP only.

[@nishasingh1332]

Ac

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[@mohammadazad148]

Ma'am environment ka marathon layye

[@byjusexamprepugcnetset]

Very soon

[@nishasingh1332]

B

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