Assertion: Amount of biodegradable organic matter present in water is measured by BOD of water Reason: During biodegradation of organic compounds. Oxy

Assertion: Amount of biodegradable organic matter present in water is measured by BOD of water Reason: During biodegradation of organic compounds. Oxy
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Assertion: Amount of biodegradable organic matter present in water is measured by BOD of water Reason: ... but reason is wrong D. both are wrong
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Assertion : BOD of river polluted by sewage is more than 20 ppm. Reason: Polluted river contains excess of organic matter.

Description : Assertion : BOD of river polluted by sewage is more than 20 ppm. Reason: Polluted river contains excess of organic matter.

Last Answer : Assertion : BOD of river polluted by sewage is more than 20 ppm. Reason: Polluted river contains excess ... true but reason is wrong D. Both are wrong

Pick out the wrong statement.(A) Biological oxygen demand (BOD) is a characteristic and not a constituent of water (B) BOD is a measure of the amount of oxygen which will be demanded & used in 5 days by the biological decomposition of the organic matter present in water stream present as food for the living organism (C) BOD is expressed in mg/litre (typically, BOD=2.5 mg/litre for potable water) (D) None of these

Description : Pick out the wrong statement. (A) Biological oxygen demand (BOD) is a characteristic and not a constituent of water (B) BOD is a measure of the amount of oxygen which will be demanded & used in 5 days ... BOD is expressed in mg/litre (typically, BOD=2.5 mg/litre for potable water) (D) None of these

Last Answer : (D) None of these

Biological Oxygen Demand (BOD) is a measure of: a. Industrial wastes poured into water bodies b. Extent to which water is polluted with organic compounds c. Amount of carbon monoxide inseparably combined with haemoglobin d. Amount of oxygen needed by green plants during night

Description : Biological Oxygen Demand (BOD) is a measure of: a. Industrial wastes poured into water bodies b. Extent to which water is polluted with organic compounds c. Amount of carbon monoxide inseparably combined with haemoglobin d. Amount of oxygen needed by green plants during night

Last Answer : Ans: A

Measuring Biochemical Oxygen Demand (BOD) is a method used for (a) estimating the amount of organic matter in sewage water (b) working out the efficiency of oil driven automobile engines (c) measuring the activity of Saccharomyces cerevisiae in producing curd on a commercial scale (d) working out the efficiency of RBCs about their capacity to carry oxygen.

Description : Measuring Biochemical Oxygen Demand (BOD) is  a method used for  (a) estimating the amount of organic matter in  sewage water (b) working out the efficiency of oil driven  automobile engines ... commercial  scale (d) working out the efficiency of RBCs about their  capacity to carry oxygen.

Last Answer : (a) estimating the amount of organic matter in  sewage water

Measuring Biochemical Oxygen Demand (BOD) is a method used for (a) estimating the amount of organic matter in sewage water (b) working out the efficiency of oil driven automobile engines (c) measuring the activity of Saccharomyces cerevisiae in producing curd on a commercial scale (d) working out the efficiency of RBCs about their capacity to carry oxygen.

Description : Measuring Biochemical Oxygen Demand (BOD) is a method used for (a) estimating the amount of organic matter in sewage water (b) working out the efficiency of oil driven automobile engines (c) ... a commercial scale (d) working out the efficiency of RBCs about their capacity to carry oxygen.

Last Answer : (a) estimating the amount of organic matter in sewage water

72. Measuring Biochemical Oxygen Demand (BOD) is a method used for (1) Working out the efficiency of R.B.Cs. about their capacity to carry oxygen (2) Estimating the amount of organic matter is sewage water (3) Working out the efficiency of oil driven automobile engines (4) Measuring the activity of Sacccharomyces cerevisae in producing curd on a commercial scale

Description : 72. Measuring Biochemical Oxygen Demand (BOD) is a method used for (1) Working out the efficiency of R.B.Cs. about their capacity to carry oxygen (2) Estimating the amount of ... driven automobile engines (4) Measuring the activity of Sacccharomyces cerevisae in producing curd on a commercial scale

Last Answer : Estimating the amount of organic matter is sewage water

Pick out the correct statement. (A) Chemical oxygen demand (COD) is a measure of chemically oxidisable organic matter present in water (B) COD is determined by oxidising the organic matter present in water with potassium dichromate in cone, sulphuric acid solution at boiling temperature for specified time (C) COD is related to BOD of a given waste in water but the relationship varies for different wastes. Typically COD of potable water may be 1-2 mg/litre (D) All (A), (B) and (C)

Description : Pick out the correct statement. (A) Chemical oxygen demand (COD) is a measure of chemically oxidisable organic matter present in water (B) COD is determined by oxidising the organic matter present in water with potassium dichromate ... of potable water may be 1-2 mg/litre (D) All (A), (B) and (C)

Last Answer : (D) All (A), (B) and (C)

High value of BOD (Biochemical Oxygen Demand) indicates that (a) water is less polluted (b) consumption of organic matter in the water is higher by the microbes (c) water is pure (d) water is highly polluted.

Description : High value of BOD (Biochemical Oxygen Demand)  indicates that (a) water is less polluted (b) consumption of organic matter in the water is  higher by the microbes  (c) water is pure (d) water is highly polluted.

Last Answer : (b) consumption of organic matter in the water is 

High value of BOD (Biochemical Oxygen Demand) indicates that (a) water is less polluted (b) consumption of organic matter in the water is higher by the microbes (c) water is pure (d) water is highly polluted.

Description : High value of BOD (Biochemical Oxygen Demand) indicates that (a) water is less polluted (b) consumption of organic matter in the water is higher by the microbes (c) water is pure (d) water is highly polluted.

Last Answer : (b) consumption of organic matter in the water is higher by the microbes

Consider the following statements : Activated sludge process can be said to comprise : 1. Conversion of dissolved organic matter into biological flocs 2. Removal of dissolved BOD of the waste water 3. Digestion of the sludge Which of these statements are correct ? (a) 1, 2 and 3 (b) 1 and 2 only (c) 2 and 3 only (d) 1 and 3 only

Description : Consider the following statements : Activated sludge process can be said to comprise : 1. Conversion of dissolved organic matter into biological flocs 2. Removal of dissolved BOD of the waste water 3. Digestion of the sludge Which ... 2 and 3 (b) 1 and 2 only (c) 2 and 3 only (d) 1 and 3 only

Last Answer : (b) 1 and 2 only

Biochemical Oxygen Demand (BOD) of sewage is the (a) Oxygen required to oxidise (b) Oxygen required to oxidise biologically inactive organic matter* (c) a and b both (d) none of these

Description : Biochemical Oxygen Demand (BOD) of sewage is the (a) Oxygen required to oxidise (b) Oxygen required to oxidise biologically inactive organic matter* (c) a and b both (d) none of these

Last Answer : (b) Oxygen required to oxidise biologically inactive organic matter*

BOD is connected with a) Organic matter b) microbes c) Microbes and Organic matter d) None of the above.

Description : BOD is connected with a) Organic matter b) microbes c) Microbes and Organic matter d) None of the above.

Last Answer : c) Microbes and Organic matter

Assertion : Organichlorine presticides are organic compounds that have been chlorinated. Reason:Fenitrothion is one of the organochlorine pesticides.

Description : Assertion : Organichlorine presticides are organic compounds that have been chlorinated. Reason:Fenitrothion is one of the organochlorine pesticides.

Last Answer : Assertion : Organichlorine presticides are organic compounds that have been chlorinated. Reason:Fenitrothion is ... reason is wrong D. Both are wrong

The BOD values of water indicate the (1) amount of organic debris (2) amount of oxygen used for biochemical oxidation (3) amount of oxygen used for biochemical reduction (4) amount of ozone used for biochemical oxidation

Description : The BOD values of water indicate the (1) amount of organic debris (2) amount of oxygen used for biochemical oxidation (3) amount of oxygen used for biochemical reduction (4) amount of ozone used for biochemical oxidation

Last Answer : amount of oxygen used for biochemical oxidation

The magnitude of BOD of wastewater is related to A.bacterial count B.amount of organic material C.amount of inorganic material D.all of the above

Description : The magnitude of BOD of wastewater is related to A.bacterial count B.amount of organic material C.amount of inorganic material D.all of the above

Last Answer : B.amount of organic material

Use of bioresources by multinational companies and organisations without authorisation from the concerned country and its people is called (a) bio-infringement (b) biopiracy (c) biodegradation (d) bioexploitation.

Description : Use of bioresources by multinational companies and organisations without authorisation from the concerned country and its people is called (a) bio-infringement (b) biopiracy (c) biodegradation (d) bioexploitation.

Last Answer : b) biopiracy

Use of bioresources by multinational companies and organisations without authorisation from the concerned country and its peoople is called (1) Bio-infringement (2) Biopiracy (3) Biodegradation (4) Bioexploitation

Description : Use of bioresources by multinational companies and organisations without authorisation from the concerned country and its peoople is called (1) Bio-infringement (2) Biopiracy (3) Biodegradation (4) Bioexploitation

Last Answer : (2) Biopiracy

Treatment of the hazardous substances in the environment with the help of living organisms is called as a. Bioremediation b. Waste management c. Waste control d. Biodegradation

Description : Treatment of the hazardous substances in the environment with the help of living organisms is called as a. Bioremediation b. Waste management c. Waste control d. Biodegradation

Last Answer : a. Bioremediation

In the context of the chemical process industries, the term BOD is normally associated with the (A) Characterisation of solid wastes (B) Organic concentration in gaseous effluents (C) Characterisation of liquid effluents (D) Characterisation of boiler feed water

Description : In the context of the chemical process industries, the term BOD is normally associated with the (A) Characterisation of solid wastes (B) Organic concentration in gaseous effluents (C) Characterisation of liquid effluents (D) Characterisation of boiler feed water

Last Answer : (C) Characterisation of liquid effluents

Most of Nitrogen is used in the decomposition of __________ and thus plant shows deficiency symptoms : a. Amino acids b. Cellulose c. Carbon compounds d. Organic matter

Description : Most of Nitrogen is used in the decomposition of __________ and thus plant shows deficiency symptoms : a. Amino acids b. Cellulose c. Carbon compounds d. Organic matter

Last Answer : Cellulose

Presence of volatile compounds like gasoline, oil, alcohol, ether etc. in municipal sewers may cause (A) Explosion(B) Non biodegradable foam(C) Undesirable plant growth(D) Corrosion

Description : Presence of volatile compounds like gasoline, oil, alcohol, ether etc. in municipal sewers may cause (A) Explosion (B) Non biodegradable foam (C) Undesirable plant growth (D) Corrosion

Last Answer : (A) Explosion

A river with an inflow of domestic sewage rich in organic waste may result in (a) an increased production of fish due to biodegradable nutrients (b) death of fish due to lack of oxygen (c) drying of the river very soon due to algal bloom (d) increased population of aquatic food web organisms.

Description : A river with an inflow of domestic sewage rich in  organic waste may result in  (a) an increased production of fish due to  biodegradable nutrients (b) death of fish due to lack of oxygen ( ... of the river very soon due to algal bloom (d) increased population of aquatic food web  organisms.

Last Answer : (d) increased population of aquatic food web  organisms.

A river with an inflow of domestic sewage rich in organic waste may result in (a) an increased production of fish due to biodegradable nutrients (b) death of fish due to lack of oxygen (c) drying of the river very soon due to algal bloom (d) increased population of aquatic food web organisms.

Description : A river with an inflow of domestic sewage rich in organic waste may result in (a) an increased production of fish due to biodegradable nutrients (b) death of fish due to lack of oxygen (c) drying of the river very soon due to algal bloom (d) increased population of aquatic food web organisms.

Last Answer : (b) death of fish due to lack of oxygen

Assertion: Sewage discharge in a water body causes eutrophication. Reason: This increases the organic content in water body and, hence, the growth of

Description : Assertion: Sewage discharge in a water body causes eutrophication. Reason: This increases the organic content in water body and, hence, the growth of

Last Answer : Assertion: Sewage discharge in a water body causes eutrophication. Reason: This increases the organic content ... Reason are false, then mark (4).

Part of the insulation of practically all electrical machinery is in the form of organic compounds which contain some amount of ______________. A. asbestos B. water C. fibre D. plastic

Description : Part of the insulation of practically all electrical machinery is in the form of organic compounds which contain some amount of ______________. A. asbestos B. water C. fibre D. plastic

Last Answer : Answer: B

Assertion:- Ionic compounds exhibits electrical conductivity in solution state. Reason :- In solution state electrons of ionic compounds are free.

Description : Assertion:- Ionic compounds exhibits electrical conductivity in solution state. Reason :- In solution state electrons of ionic compounds are free.

Last Answer : Assertion:- Ionic compounds exhibits electrical conductivity in solution state. Reason :- In solution state ... . If both Assertion & Reason are false

Assertion :- Oxidation number of `S` in `HSO_(3)^(-)` is `+4`. Reason :- Sulphur is in different oxidation state in different compounds.

Description : Assertion :- Oxidation number of `S` in `HSO_(3)^(-)` is `+4`. Reason :- Sulphur is in different oxidation state in different compounds.

Last Answer : Assertion :- Oxidation number of `S` in `HSO_(3)^(-)` is `+4`. Reason :- Sulphur is in ... Reason is False. D. If both Assertion & Reason are False.

Assertion: Euro II norms are framed to reduce the content of CO and aromatic compounds from fuels. Reason: These compounds lead to reduced visibility

Description : Assertion: Euro II norms are framed to reduce the content of CO and aromatic compounds from fuels. Reason: These compounds lead to reduced visibility

Last Answer : Assertion: Euro II norms are framed to reduce the content of CO and aromatic compounds from fuels. Reason ... and Reason are false, then mark (4).

Assertion(A): Ethyl alcohol is soluble in organic solvents Reason (R): Ethyl alcohol is having non polar ethyl group

Description : Assertion(A): Ethyl alcohol is soluble in organic solvents Reason (R): Ethyl alcohol is having non polar ethyl group

Last Answer : Assertion(A): Ethyl alcohol is soluble in organic solvents Reason (R): Ethyl alcohol is having non polar ... is false D. A is false but R is true

Assertion (A): Ethyl alcohol is soluble in organic solvents Reason(R): Calcium chloride can form an addition compound with ethyl alcohol

Description : Assertion (A): Ethyl alcohol is soluble in organic solvents Reason(R): Calcium chloride can form an addition compound with ethyl alcohol

Last Answer : Assertion (A): Ethyl alcohol is soluble in organic solvents Reason(R): Calcium chloride can form an addition ... is false D. A is false but R is true

Assertion : Estrogen level is high during the follicular phase of menstrual cycle . Reason : During this phase corpus luteum secrete large amount of e

Description : Assertion : Estrogen level is high during the follicular phase of menstrual cycle . Reason : During this phase corpus luteum secrete large amount of e

Last Answer : Assertion : Estrogen level is high during the follicular phase of menstrual cycle . Reason : During this ... D. If both Assertion & Reason are False.

Assertion :- During S-phase, amount of DNA per cell boubles. Reason :- During S-phase, there is no increase in cromosome number.

Description : Assertion :- During S-phase, amount of DNA per cell boubles. Reason :- During S-phase, there is no increase in cromosome number.

Last Answer : Assertion :- During S-phase, amount of DNA per cell boubles. Reason :- During S-phase, there is ... False. D. If both Assertion & Reason are false.

What is the reason for the high number of organic compounds ?

Description : What is the reason for the high number of organic compounds ?

Last Answer : The reasons for the high number of organic compounds are: 1) Cation of carbon element 2) Electronegativity and bonding strength of carbon 3) Equivalence of organic compounds

What are the important organic compounds present in living organisms? -Biology

Description : What are the important organic compounds present in living organisms? -Biology

Last Answer : All organisms need four types of organic molecules: nucleic acids, proteins, carbohydrates and lipids; life cannot exist if any of these molecules are missing. Nucleic Acids. The nucleic acids are DNA ... acid and ribonucleic acid, respectively. ... Proteins. ... Carbohydrates. ... Lipids.

The nature of chemical bond present in organic compounds is

Description : The nature of chemical bond present in organic compounds is

Last Answer : covalent bond.

On the basics of functional groups present, how are organic compounds classified?

Description : On the basics of functional groups present, how are organic compounds classified?

Last Answer : Alkyl / Aryl radical (Less reactive part) and Functional group ( Active part)

Name three typical organic compounds commonly present in our food.

Description : Name three typical organic compounds commonly present in our food.

Last Answer : Starch, sugar, citric acid, cooking oil etc.

What element is present in all organic compounds

Description : What element is present in all organic compounds

Last Answer : Carbon

When huge amount of sewage is dumped into a river the BOD will:

Description : When huge amount of sewage is dumped into a river the BOD will:

Last Answer : When huge amount of sewage is dumped into a river the BOD will: A. Increases B. Decreases C. Slightly decreases D. remains unchanged.

The domestic sewage in large cities (a) has a high BOD as it contains both aerobic and anaerobic bacteria (b) is processed by aerobic and then anaerobic bacteria in the secondary treatment in Sewage Treatment Plants (STPs) (c) when treated in STPs does not really require the aeration step as the sewage contains adequate oxygen (d) has very high amount of suspended solids and dissolved salts.

Description : The domestic sewage in large cities (a) has a high BOD as it contains both aerobic and anaerobic bacteria (b) is processed by aerobic and then anaerobic bacteria in the secondary treatment in ... sewage contains adequate oxygen (d) has very high amount of suspended solids and dissolved salts.

Last Answer : (b) is processed by aerobic and then anaerobic bacteria in the secondary treatment in Sewage Treatment Plants (STPs)

Assertion: Suspended particulate matter(SPM) is an important pollutant released by diesel vehicles. Reason : Catalytic convertes greatly reduce pollut

Description : Assertion: Suspended particulate matter(SPM) is an important pollutant released by diesel vehicles. Reason : Catalytic convertes greatly reduce pollut

Last Answer : Assertion: Suspended particulate matter(SPM) is an important pollutant released by diesel vehicles. Reason : ... but reason is wrong D. Both are wrong

Give reason: Lead vapours or D.D.T is a non-biodegradable pollutant.

Description : Give reason: Lead vapours or D.D.T is a non-biodegradable pollutant.

Last Answer : Lead vapours or D.D.T cannot be converted into harmless substance by any known biological activity hence they are referred to as non-biodegradable pollutants.

Give reason: Sulphur dioxide or sewage is a biodegradable pollutant.

Description : Give reason: Sulphur dioxide or sewage is a biodegradable pollutant.

Last Answer : Sulphur dioxide gets diluted with rainwater and becomes harmless. Sewage is made harmless by biological activity. Hence it is a biodegradable pollutant.

What are the organic matter present in the soil ?

Description : What are the organic matter present in the soil ?

Last Answer : Organic matter present in the soil is: Leech , earthworm refers to such animals or their feces.

The organic matter present in soil is known collectively as – (1) Hydrocarbons (2) Podsols (3) Humus (4) Colloids

Description : The organic matter present in soil is known collectively as – (1) Hydrocarbons (2) Podsols (3) Humus (4) Colloids

Last Answer : (3) Humus Explanation: The organic matter present in soil is known collectively as humus. Humus is fully decomposed and finely divided organic matter. Dune is a hill or ridge of sand accumulated and sorted by wind action.

The organic matter present in soil is known collectively as (1) Hydrocarbons (2)Podsols (3) Humus (4)Colloids

Description : The organic matter present in soil is known collectively as (1) Hydrocarbons (2)Podsols (3) Humus (4)Colloids

Last Answer : Humus

Assertion `:-` Mostly aquatic animals are ammonotelic. Reason `:-` Ammonia is the most toxic form and requires large amount of water for its eliminati

Description : Assertion `:-` Mostly aquatic animals are ammonotelic. Reason `:-` Ammonia is the most toxic form and requires large amount of water for its eliminati

Last Answer : Assertion `:-` Mostly aquatic animals are ammonotelic. Reason `:-` Ammonia is the most toxic form and ... . D. If both Assertion & Reason are false.

Assertion `:-` The primary function of sweat is to facilitate a cooling effect on the body surface. Reason `:-` Small amount of nitrogenous wastes cou

Description : Assertion `:-` The primary function of sweat is to facilitate a cooling effect on the body surface. Reason `:-` Small amount of nitrogenous wastes cou

Last Answer : Assertion `:-` The primary function of sweat is to facilitate a cooling effect on the body surface. ... . D. If both Assertion & Reason are false.

Assertion `:-` In fish ammonia is excreted by diffusion through gill surface as ammonium ions. Reason `:-` Some amount of urea may be retained in the

Description : Assertion `:-` In fish ammonia is excreted by diffusion through gill surface as ammonium ions. Reason `:-` Some amount of urea may be retained in the

Last Answer : Assertion `:-` In fish ammonia is excreted by diffusion through gill surface as ammonium ions. Reason ` ... . D. If both Assertion & Reason are false.

Assertion . Mast cells in human body release excessive amount of inflammatory chemicals which cause allergic reactions. Reason . Allergens in the envi

Description : Assertion . Mast cells in human body release excessive amount of inflammatory chemicals which cause allergic reactions. Reason . Allergens in the envi

Last Answer : Assertion . Mast cells in human body release excessive amount of inflammatory chemicals which cause ... If both the assertion and reason are false