Presence of dissolved impurities of __________ is responsible for the red brownish color of water. (A) Carbonates (B) Bi-carbonates (C) Iron & manganese (D) Arsenic

Presence of dissolved impurities of __________ is responsible for the
red brownish color of water.
(A) Carbonates
(B) Bi-carbonates
(C) Iron & manganese
(D) Arsenic
by

1 Answer

Answer :

(C) Iron & manganese
by

Related questions

The commonest form of iron & manganese found in ground water as pollutant is in the form of their (A) Carbonates (B) Bi-carbonates (C) Chlorides (D) Sulphides

Description : The commonest form of iron & manganese found in ground water as pollutant is in the form of their (A) Carbonates (B) Bi-carbonates (C) Chlorides (D) Sulphides

Last Answer : (B) Bi-carbonates

__________ are used as corrosion inhibitor for iron & steel in aqueous solutions. (A) Phosphates (B) Chromates (C) Sulphates (D) Bi-carbonates

Description : __________ are used as corrosion inhibitor for iron & steel in aqueous solutions. (A) Phosphates (B) Chromates (C) Sulphates (D) Bi-carbonates

Last Answer : (B) Chromates

Permanent hardness of water is due to the presence of calcium & magnesium (A) Bi-carbonates (B) Sulphates & chlorides (C) Carbonate (D) None of these

Description : Permanent hardness of water is due to the presence of calcium & magnesium (A) Bi-carbonates (B) Sulphates & chlorides (C) Carbonate (D) None of these

Last Answer : (B) Sulphates & chlorides

Pick out the wrong statement. (A) Hard glass which is used for making laboratory glass wares is a mixture of sodium borosilicate and aluminium borosilicate (B) Glass is decolorized during its manufacture by adding antimony oxide, manganese dioxide or arsenic oxide (C) Ordinary glass is represented chemically by Na2O . CaO . 6SiO2 (D) Red color is imparted to glass by addition of arsenic oxide

Description : Pick out the wrong statement. (A) Hard glass which is used for making laboratory glass wares is a mixture of sodium borosilicate and aluminium borosilicate (B) Glass is decolorized during its manufacture by ... Na2O . CaO . 6SiO2 (D) Red color is imparted to glass by addition of arsenic oxide

Last Answer : (D) Red color is imparted to glass by addition of arsenic oxide

Coloured glass is obtained by mixing of colored salts. Addition of __________ oxide is done to impart greenish blue color to the glass. (A) Chromium (B) Arsenic (C) Copper (D) Manganese

Description : Coloured glass is obtained by mixing of colored salts. Addition of __________ oxide is done to impart greenish blue color to the glass. (A) Chromium (B) Arsenic (C) Copper (D) Manganese

Last Answer : (C) Copper

. Presence of iron and manganese in water causes (A) Reduction in its dissolved oxygen content (B) Discoloration of bathroom fixtures (C) Temporary hardness (D) None of these

Description : . Presence of iron and manganese in water causes (A) Reduction in its dissolved oxygen content (B) Discoloration of bathroom fixtures (C) Temporary hardness (D) None of these

Last Answer : (B) Discoloration of bathroom fixtures

Agglomeration of individual particles into clusters (flocs) is called flocculation. To prevent flocculation, the most commonly used dispersing agents are (A) Carbonates (B) Sulphates (C) Silicates & phosphates (D) Bi-carbonates

Description : Agglomeration of individual particles into clusters (flocs) is called flocculation. To prevent flocculation, the most commonly used dispersing agents are (A) Carbonates (B) Sulphates (C) Silicates & phosphates (D) Bi-carbonates

Last Answer : (C) Silicates & phosphates

When domestic sewage mixes with river water (a) small animals like rats will die after drinking river water (b) the increased microbial activity releases micronutrients such as iron (c) the increased microbial activity uses up dissolved oxygen (d) the river water is still suitable for drinking as impurities are only about 0.1%.

Description : When domestic sewage mixes with river water (a) small animals like rats will die after drinking  river water (b) the increased microbial activity releases  micronutrients such as iron (c) the increased ... (d) the river water is still suitable for drinking as  impurities are only about 0.1%.

Last Answer : (c) the increased microbial activity uses up  dissolved oxygen

Fluorosis is caused due to the presence of excessive amount of __________ in drinking water. (A) Mercury (B) Lead (C) Fluoride (D) Arsenic

Description : Fluorosis is caused due to the presence of excessive amount of __________ in drinking water. (A) Mercury (B) Lead (C) Fluoride (D) Arsenic

Last Answer : (C) Fluoride

The majority of carbon dioxide produced by our body cells is transported to the lungs as (a) attached to haemoglobin (b) dissolved in the blood (c) as bicarbonates (d) as carbonates.

Description : The majority of carbon dioxide produced by our body cells is transported to the lungs as (a) attached to haemoglobin (b) dissolved in the blood (c) as bicarbonates (d) as carbonates.

Last Answer : (c) as bicarbonates

The presence of impurities in iron (A) Increases its melting point (B) Does not affect its melting point (C) Decreases its melting point (D) Makes it malleable

Description : The presence of impurities in iron (A) Increases its melting point (B) Does not affect its melting point (C) Decreases its melting point (D) Makes it malleable

Last Answer : (C) Decreases its melting point

Presence of even 0.005% of __________ in copper makes it highly brittle, rendering it useless for wire-drawing. (A) Oxygen (B) Arsenic (C) Antimony (D) Bismuth

Description : Presence of even 0.005% of __________ in copper makes it highly brittle, rendering it useless for wire-drawing. (A) Oxygen (B) Arsenic (C) Antimony (D) Bismuth

Last Answer : (D) Bismuth

Presence of even very minute amount (say 0.1%) of __________ in copper, reduces its electrical conductivity very seriously. (A) Bismuth (B) Arsenic (C) Antimony (D) Both (B) and (C)

Description : Presence of even very minute amount (say 0.1%) of __________ in copper, reduces its electrical conductivity very seriously. (A) Bismuth (B) Arsenic (C) Antimony (D) Both (B) and (C)

Last Answer : (D) Both (B) and (C)

Presence of 0.3 to 0.5% arsenic in copper increases its (A) Ductility (B) Malleability (C) Tenacity & hardness (D) Electrical conductivity

Description : Presence of 0.3 to 0.5% arsenic in copper increases its (A) Ductility (B) Malleability (C) Tenacity & hardness (D) Electrical conductivity

Last Answer : (C) Tenacity & hardness

Hydrazine is used in water treatment for the removal of (A) Colloidal impurities (B) Dissolved oxygen (C) Turbidity (D) Chlorinous taste

Description : Hydrazine is used in water treatment for the removal of (A) Colloidal impurities (B) Dissolved oxygen (C) Turbidity (D) Chlorinous taste

Last Answer : (B) Dissolved oxygen

Which of the following impurities in feed water for high pressure boiler is the most detrimental? (A) Silica (B) Dissolved oxygen (C) Suspended salt (D) Dissolved salt

Description : Which of the following impurities in feed water for high pressure boiler is the most detrimental? (A) Silica (B) Dissolved oxygen (C) Suspended salt (D) Dissolved salt

Last Answer : (A) Silica

Liquor poisoning generally occurs due to the presence of __________ in it. (A) Ethyl alcohol (B) Impurities (C) Methyl alcohol (D) Carbonic acid

Description : Liquor poisoning generally occurs due to the presence of __________ in it. (A) Ethyl alcohol (B) Impurities (C) Methyl alcohol (D) Carbonic acid

Last Answer : (C) Methyl alcohol

Liquor poisoning generally occurs due to the presence of __________ in it. (A) Ethyl alcohol (B) Impurities (C) Methyl alcohol (D) Carbonic acid

Description : Liquor poisoning generally occurs due to the presence of __________ in it. (A) Ethyl alcohol (B) Impurities (C) Methyl alcohol (D) Carbonic acid

Last Answer : (C) Methyl alcohol

Growth of __________ is promoted by the presence of manganese in water. (A) Files (B) Algae (C) Micro-organisms (D) Mosquitoes

Description : Growth of __________ is promoted by the presence of manganese in water. (A) Files (B) Algae (C) Micro-organisms (D) Mosquitoes

Last Answer : (C) Micro-organisms

The brownish colour of Brown Algae is due to presence of ...... pigment?

Description : The brownish colour of Brown Algae is  due to presence of ...... pigment?

Last Answer : Xanthophyll

Commercial nitric acid is coloured because it contains dissolved – (1) Oxygen (2) Nitrous oxide (3) Nitrogen dioxide (4) Coloured impurities

Description : Commercial nitric acid is coloured because it contains dissolved – (1) Oxygen (2) Nitrous oxide (3) Nitrogen dioxide (4) Coloured impurities

Last Answer : (3) Nitrogen dioxide Explanation: Commercial nitric acid has a brown colour due to dissolved NO2. The procedure of bubbling dry air through warm commercial nitric acid, is to drive away the dissolved nitrogen dioxide so that the acid becomes colourless.

Commercial nitric acid is coloured because it contains dissolved : (1) Oxygen (2) Nitrous oxide (3) Nitrogen dioxide (4) Coloured impurities

Description : Commercial nitric acid is coloured because it contains dissolved : (1) Oxygen (2) Nitrous oxide (3) Nitrogen dioxide (4) Coloured impurities

Last Answer : Nitrogen dioxide

An 8-year-old child presented with brownish discoloured and deformed anterior teeth. History of having received an antibiotic about 4 years earlier was obtained. Which antibiotic could be responsible for the condition ? (a) Chloramphenicol (b) Tetracycline (c) Erythromycin (d) Genetamicin

Description : An 8-year-old child presented with brownish discoloured and deformed anterior teeth. History of having received an antibiotic about 4 years earlier was obtained. Which antibiotic could be responsible for the condition ? (a) Chloramphenicol (b) Tetracycline (c) Erythromycin (d) Genetamicin

Last Answer : Ans: B

An 8-year-old child presented with brownish discoloured and deformed anterior teeth. History of having received an antibiotic about 4 years earlier was obtained. Which antibiotic could be responsible for the condition: A. Chloramphenicol B. Tetracycline C. Erythromycin D. Gentamicin

Description : An 8-year-old child presented with brownish discoloured and deformed anterior teeth. History of having received an antibiotic about 4 years earlier was obtained. Which antibiotic could be responsible for the condition: A. Chloramphenicol B. Tetracycline C. Erythromycin D. Gentamicin

Last Answer : Tetracycline

Presence of manganese in alloy steel improves its (A) Corrosion resistance (B) Cutting ability (C) Abrasion resistance & toughness (D) Elasticity & creep resistance

Description : Presence of manganese in alloy steel improves its (A) Corrosion resistance (B) Cutting ability (C) Abrasion resistance & toughness (D) Elasticity & creep resistance

Last Answer : (C) Abrasion resistance & toughness

White colour of soil is due to the presence of – a) Silica b) Iron c) Manganese oxide d) All of these

Description : White colour of soil is due to the presence of – a) Silica b) Iron c) Manganese oxide d) All of these

Last Answer : c) Manganese oxide

Platinum is a versatile catalyst for many processes in chemical industries. It is highly prone to be poisoned by the presence of (A) Carbon (B) Arsenic (C) Lead (D) Sulphur

Description : Platinum is a versatile catalyst for many processes in chemical industries. It is highly prone to be poisoned by the presence of (A) Carbon (B) Arsenic (C) Lead (D) Sulphur

Last Answer : (B) Arsenic

Lagoons used for purification of polluted water (A) Are large shallow artificial lakes also known as clarification lakes, maturation ponds or oxidation ponds (B) Use micro-organisms/bacteria in presence of dissolved oxygen (C) Gives an excellent final effluent (with 3 to 4 lagoons arranged in series) having suspended solid < 1 mg/litre and BOD = 3.8 mg/litre (D) All (A), (B) & (C)

Description : Lagoons used for purification of polluted water (A) Are large shallow artificial lakes also known as clarification lakes, maturation ponds or oxidation ponds (B) Use micro-organisms/bacteria in presence of dissolved oxygen (C) Gives an ... 1 mg/litre and BOD = 3.8 mg/litre (D) All (A), (B) & (C)

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

Corrosiveness of steam condensate is due to the presence of (A) CO2 (B) Dissolved O2 (C) Both (A) & (B) (D) Neither (A) nor (B)

Description : Corrosiveness of steam condensate is due to the presence of (A) CO2 (B) Dissolved O2 (C) Both (A) & (B) (D) Neither (A) nor (B)

Last Answer : (C) Both (A) & (B)

Magnesium and calcium __________ cause temporary hardness of water. (A) Carbonates (B) Bicarbonates (C) Phosphates (D) Sulphates

Description : Magnesium and calcium __________ cause temporary hardness of water. (A) Carbonates (B) Bicarbonates (C) Phosphates (D) Sulphates

Last Answer : (B) Bicarbonates

Why is my urine a brownish/redish color?

Description : Why is my urine a brownish/redish color?

Last Answer : Make sure you drink enough water. A healthy person’s urine is relatively clear. If you’re dehydrated, it becomes a darker hue, because the waste has less water to mix with to dilute the colour.

the leaves, on my lucky bamboo plant, is turning a brownish color.

Description : the leaves, on my lucky bamboo plant, is turning a brownish color.

Last Answer : I have a lucky bamboo plant so hopefully this will help. I am thinking you havent changed the water in you plant. My plant is in a simple jar with rocks. Not sure if yours is in dirt or rocks but ... , bring it inside and let it warm up a little. Lucky bamboo do not like cold water. Hope this helps

Why would the Sahara have a brownish color when seen in space?

Description : Why would the Sahara have a brownish color when seen in space?

Last Answer : because shipments are from outside (aalovemusicart)i am a 10-year old

Paper of old books turns to brownish color due to –

Description : Paper of old books turns to brownish color due to –

Last Answer : Oxidation of cellulose

__________ is removed from water by lime-soda process. (A) Foul smell and taste (B) Iron and manganese (C) Temporary hardness (D) Permanent hardness

Description : __________ is removed from water by lime-soda process. (A) Foul smell and taste (B) Iron and manganese (C) Temporary hardness (D) Permanent hardness

Last Answer : (C) Temporary hardness

Red color of onion is caused due to the presence of - a) Zinc b) Sulpher c) Iron d) Anthocynin

Description : Red color of onion is caused due to the presence of - a) Zinc b) Sulpher c) Iron d) Anthocynin

Last Answer : d) Anthocynin

how to treat red larvae, black worms, with brownish mold on lilac trees?

Description : how to treat red larvae, black worms, with brownish mold on lilac trees?

Last Answer : Need Answer

Spark plugs, ignition tubes and electrodes are made of nickel __________ alloys. (A) Beryllium (B) Manganese (C) Copper (D) Iron

Description : Spark plugs, ignition tubes and electrodes are made of nickel __________ alloys. (A) Beryllium (B) Manganese (C) Copper (D) Iron

Last Answer : (B) Manganese

__________ is used as a flux in the extraction of iron from iron ore (haematite) in blast furnace. (A) Bauxite (B) Limestone (C) Quartz (D) Manganese

Description : __________ is used as a flux in the extraction of iron from iron ore (haematite) in blast furnace. (A) Bauxite (B) Limestone (C) Quartz (D) Manganese

Last Answer : (B) Limestone

Addition of small amount of __________ to grey cast iron is done to produce nodular grey cast iron. (A) Manganese (B) Phosphorous (C) Magnesium (D) Chromium

Description : Addition of small amount of __________ to grey cast iron is done to produce nodular grey cast iron. (A) Manganese (B) Phosphorous (C) Magnesium (D) Chromium

Last Answer : Option C

Iron & manganese present in the polluted water is removed by (A) Simple filtration (B) Oxidation followed by settling & filtration (C) Chemical coagulation (D) Chlorination only

Description : Iron & manganese present in the polluted water is removed by (A) Simple filtration (B) Oxidation followed by settling & filtration (C) Chemical coagulation (D) Chlorination only

Last Answer : (B) Oxidation followed by settling & filtration

Iron & manganese present as pollutant in water cannot be removed by (A) Ion exchange process (B) Oxidation followed by settling & filtration (C) Lime soda process or manganese zeolite process(D) Chlorination

Description : Iron & manganese present as pollutant in water cannot be removed by (A) Ion exchange process (B) Oxidation followed by settling & filtration (C) Lime soda process or manganese zeolite process (D) Chlorination

Last Answer : (D) Chlorination

Which one of the following is responsible for blue baby syndrome? (1) Fluoride (2) Nitrate (3) Arsenic (4) Lead

Description : Which one of the following is responsible for blue baby syndrome? (1) Fluoride (2) Nitrate (3) Arsenic (4) Lead

Last Answer : (2) Nitrate

Brittleness induced due to the presence of sulphur in steel can be reduced by adding (A) Manganese (B) Magnesium (C) Vanadium (D) Copper

Description : Brittleness induced due to the presence of sulphur in steel can be reduced by adding (A) Manganese (B) Magnesium (C) Vanadium (D) Copper

Last Answer : (A) Manganese

Brittleness induced due to the presence of sulphur in steel can be reduced by adding (A) Manganese (B) Magnesium (C) Vanadium (D) Copper

Description : Brittleness induced due to the presence of sulphur in steel can be reduced by adding (A) Manganese (B) Magnesium (C) Vanadium (D) Copper

Last Answer : r: Option A

Turbidity of water is an indication of the presence of (A) Suspended inorganic matter (B) Dissolved solids (C) Floating solids (D) Dissolved gases

Description : Turbidity of water is an indication of the presence of (A) Suspended inorganic matter (B) Dissolved solids (C) Floating solids (D) Dissolved gases

Last Answer : (A) Suspended inorganic matter

Presence of non-biodegradable substances, like alkyl benzene sulphonate (ABS) from the detergents in polluted water stream causes (A) Fire hazards (B) Explosion hazards (C) Persistent foam (D) Depletion of dissolved oxygen

Description : Presence of non-biodegradable substances, like alkyl benzene sulphonate (ABS) from the detergents in polluted water stream causes (A) Fire hazards (B) Explosion hazards (C) Persistent foam (D) Depletion of dissolved oxygen

Last Answer : (C) Persistent foam

As the impurities are oxidised, the melting point of iron (A) Decreases (B) Remains unchanged (C) Increases (D) May increase or decrease; unpredictable

Description : As the impurities are oxidised, the melting point of iron (A) Decreases (B) Remains unchanged (C) Increases (D) May increase or decrease; unpredictable

Last Answer : (C) Increases

Limestone is added in the blast furnace (during pig iron manufacture) to (A) Form slag by combining with impurities (B) Supply heat by undergoing exothermic reaction with impurities (C) Reduce the coke consumption (D) Reduce slag viscosity

Description : Limestone is added in the blast furnace (during pig iron manufacture) to (A) Form slag by combining with impurities (B) Supply heat by undergoing exothermic reaction with impurities (C) Reduce the coke consumption (D) Reduce slag viscosity

Last Answer : Option A

Locomotive boiler tubes are made of __________ alloys. (A) Arsenic copper (B) Magnesium (C) Aluminium (D) Nickel

Description : Locomotive boiler tubes are made of __________ alloys. (A) Arsenic copper (B) Magnesium (C) Aluminium (D) Nickel

Last Answer : (A) Arsenic copper