Browning of paper in old books is caused by – (1) frequent use (2) lack of aeration (3) collection of dust (4) oxidation of cellulose

Browning of paper in old books is caused by – (1) frequent use (2) lack of aeration (3) collection of dust (4) oxidation of cellulose
by

1 Answer

Answer :

(4) oxidation of cellulose Explanation: Foxing is a term describing the age-related spots and browning seen on vintage paper documents such as books, postage stamps, certificates, and so forth. It results from localized accelerated oxidation of cellulose or the effect on certain papers of the oxidation of iron, copper, etc.
by
selected

Related questions

Browning of paper in old books is caused by (1) frequent use (2) lack of aeration (3) collection of dust (4) oxidation of cellulose

Description : Browning of paper in old books is caused by (1) frequent use (2) lack of aeration (3) collection of dust (4) oxidation of cellulose

Last Answer :  oxidation of cellulose

When did books start having paper dust covers?

Description : When did books start having paper dust covers?

Last Answer : read this explanation link Early 1800s.

The open "Sigrees” or coal stoves often require fanning to sustain burning because of (1) tendency of carbon dioxide to form a layer along with dust smoke (2) lack of oxygen in the surroundings of sigrees (3) accumulation of smoke and dust over the sigrees (4) interrupted release of moisture from the material

Description : The open "Sigrees or coal stoves often require fanning to sustain burning because of (1) tendency of carbon dioxide to form a layer along with dust smoke (2) lack of oxygen in the ... 3) accumulation of smoke and dust over the sigrees (4) interrupted release of moisture from the material

Last Answer : (1) tendency of carbon dioxide to form a layer along with dust smoke Explanation: Burning coal requires oxygen to chemically react. The availability of oxygen is limited in the furnace by several factors ... dioxide from forming layer along with dust smoke so as to keep the supply of oxygen intact.

The open "Sigrees" or coal stoves often require fanning to sustain burning because of (1) tendency of carbon dioxide to form a layer along with dust smoke (2) lack of oxygen in the surroundings of sigrees (3) accumulation of smoke and dust over the sigrees (4) interrupted release of moisture from the material

Description : The open "Sigrees" or coal stoves often require fanning to sustain burning because of (1) tendency of carbon dioxide to form a layer along with dust smoke (2) lack of oxygen in the ... 3) accumulation of smoke and dust over the sigrees (4) interrupted release of moisture from the material

Last Answer : tendency of carbon dioxide to form a layer along with dust smoke

Plants have ____________ while animals lack it. (a) Starch (b) Cellulose (c) Protein (d) Fat

Description : Plants have ____________ while animals lack it. (a) Starch (b) Cellulose (c) Protein (d) Fat

Last Answer : Ans:(b)

Select the correct combination of the statements (i-iv) regarding the characteristics of certain organisms. (i) Methanogens are archaebacteria which produce methane in marshy areas. (ii) Nostoc is a filamentous blue-green alga which fixes atmospheric nitrogen. (iii)Chemosynthetic autotrophic bacteria synthesize cellulose from glucose. (iv) Mycoplasma lack a cell wall and can survive without oxygenThe correct statements are (a) (ii) and (iii) (b) (i),(ii) and (iii) (c) (ii), (iii) and (iv) (d) (i), (ii) and (iv)..

Description : Select the correct combination of the statements (i-iv) regarding the characteristics of certain organisms. (i) Methanogens are archaebacteria which produce methane in marshy areas. (ii) Nostoc is a filamentous blue-green alga which fixes ... iii) (c) (ii), (iii) and (iv) (d) (i), (ii) and (iv).

Last Answer : (d) (i), (ii) and (iv)

Humans cannot digest cellulose because: a) it does not contain sugars b) it is made up of disaccharides c) it is made up of monosaccharides d) humans lack the proper enzymes

Description : Humans cannot digest cellulose because: a) it does not contain sugars b) it is made up of disaccharides c) it is made up of monosaccharides d) humans lack the proper enzymes

Last Answer : ANSWER: D -- HUMANS LACK THE PROPER ENZYMES 

Browning of cauliflower caused due to deficiency of — a. Ca b. B c. N d. S

Description : Browning of cauliflower caused due to deficiency of — a. Ca b. B c. N d. S

Last Answer : b. B

Which of the following products is not derived from cellulose? (a) Rayon (d) Paper(b) Insulin (c) Gun cotton

Description : Which of the following products is not derived from cellulose? (a) Rayon (b) Insulin (c) Gun cotton (d) Paper

Last Answer : Insulin

How can I avoid excessive dust collection?

Description : How can I avoid excessive dust collection?

Last Answer : You can dust your house frequently with pledge products. Also, vacuum frequently to rid your house of pet hair, one of the worst causes of dust.

The large collection of Stars, dust and gas held together by gravitational attraction between components is known as - (1) Cluster (2) Atmosphere (3) Galaxy (4) Sun Family

Description : The large collection of Stars, dust and gas held together by gravitational attraction between components is known as - (1) Cluster (2) Atmosphere (3) Galaxy (4) Sun Family

Last Answer : (3) Galaxy Explanation: The term galaxy refers to a large collection of stars, dust, and gas clouds which are held together by gravitational attraction.

The large collection of Stars, dust and gas held together by gravitational attraction between components is known as (1) Cluster (2) Atmosphere (3) Galaxy (4) Sun Family

Description : The large collection of Stars, dust and gas held together by gravitational attraction between components is known as (1) Cluster (2) Atmosphere (3) Galaxy (4) Sun Family

Last Answer : (3) Galaxy Explanation: The term galaxy refers to a large collection of stars, dust, and gas clouds which are held together by gravitational attraction.

The large collection of stars, dust and gas held together by gravitational attraction between components is known as – (1) Cluster (2) Atmosphere (3) Galaxy (4) Sun Family

Description : The large collection of stars, dust and gas held together by gravitational attraction between components is known as – (1) Cluster (2) Atmosphere (3) Galaxy (4) Sun Family

Last Answer : (3) Galaxy Explanation: The term galaxy refers to a large collection of stars, dust, and has clouds which are held together by gravitational attraction. The smallest galaxies may contain only a ... largest galaxies have thousands of billions of stars. The Milky Way galaxy contains our solar system.

Dust collection efficiency of electrostatic precipitator can be as high as 99.9%. Maximum temperature and pressure of dust laden gas that can be cleaned in an electrostatic precipitator is respectively. (A) 200°C and 5 atm (B) 1000°C and 10 atm (C) 500°C and 50 atm (D) 1000°C and 500 atm

Description : Dust collection efficiency of electrostatic precipitator can be as high as 99.9%. Maximum temperature and pressure of dust laden gas that can be cleaned in an electrostatic precipitator is respectively. (A) 200°C and 5 atm (B) 1000°C and 10 atm (C) 500°C and 50 atm (D) 1000°C and 500 atm

Last Answer : (B) 1000°C and 10 atm

Dust collection efficiency of a cyclone separator depends upon its (A) Diameter (B) Inlet gas velocity (C) Overall height (D) All (A), (B) & (C)

Description : Dust collection efficiency of a cyclone separator depends upon its (A) Diameter (B) Inlet gas velocity (C) Overall height (D) All (A), (B) & (C)

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

Which of the following dust collection equipments is the least efficient (for sub-micronic particles)? (A) Dust catcher (gravity type) (B) Cyclone separator (C) Bag filter (D) Hollow wet scrubber

Description : Which of the following dust collection equipments is the least efficient (for sub-micronic particles)? (A) Dust catcher (gravity type) (B) Cyclone separator (C) Bag filter (D) Hollow wet scrubber

Last Answer : (A) Dust catcher (gravity type)

Pick out the wrong statement. (A) A slight haze at the top of chimney indicates good combustion in the furnace (B) A bag filter incurs very small pressure drop and is very efficient for removal of submicronic dust particles from flue gases at very high temperature (C) Electrostatic precipitator is the most efficient dust collection equipment for removal of submicronic dust particles present in flue gas (D) None of these

Description : Pick out the wrong statement. (A) A slight haze at the top of chimney indicates good combustion in the furnace (B) A bag filter incurs very small pressure drop and is very efficient for ... dust collection equipment for removal of submicronic dust particles present in flue gas (D) None of these

Last Answer : (B) A bag filter incurs very small pressure drop and is very efficient for removal of submicronic dust particles from flue gases at very high temperature

The large collection of stars, dust and gas held together by gravitational attraction between components is known as (1) Cluster (2) Atmosphere (3) Galaxy (4) Sun Family

Description : The large collection of stars, dust and gas held together by gravitational attraction between components is known as (1) Cluster (2) Atmosphere (3) Galaxy (4) Sun Family

Last Answer : Galaxy

Explain ash disposal and dust collection in a thermal power plant.

Description : Explain ash disposal and dust collection in a thermal power plant.

Last Answer : Ash disposal:-  Various methods of disposal of ash are:  Mechanical handling system.  Pneumatic system. Hydraulic system  Steam jet system  Commonly used ash handling ... be done either manually or automatically.  This removed fly ash is collected in separate container

Why do we find increased porosity, yellowish tinge and lack of tensile strength in old paper?

Description : Why do we find increased porosity, yellowish tinge and lack of tensile strength in old paper?

Last Answer : Paper contains significant amount of lignin. Exposure of lignin to air and sunlight causes old paper to turn yellowish.

Photographic plates are covered with black paper because (a) the cellulose acetate of the paper must remain fresh (b) sunlight is easily absorbed by black paper and it helps develop the film (c) the silver bromide present on the plate is very sensitive to light and black paper prevents contact with light (d) the conversion of silver bromide to metallic silver is essential

Description : Photographic plates are covered with black paper because (a) the cellulose acetate of the paper must remain fresh (b) sunlight is easily absorbed by black paper and it helps develop the film ... paper prevents contact with light (d) the conversion of silver bromide to metallic silver is essential

Last Answer : Ans:(c)

Paper grade bamboo contains about __________ percent cellulose. (A) 5 (B) 20 (C) 40 (D) 60

Description : Paper grade bamboo contains about __________ percent cellulose. (A) 5 (B) 20 (C) 40 (D) 60

Last Answer : (A) 5

The ideal pulp for the manufacture of paper should have high __________ content. (A) Cellulose (B) Lignin (C) Both (A) & (B) (D) None of these

Description : The ideal pulp for the manufacture of paper should have high __________ content. (A) Cellulose (B) Lignin (C) Both (A) & (B) (D) None of these

Last Answer : (A) Cellulose

Pick out the wrong statement. (A) Fibrillation of fibre during paper manufacture is done to develop the strength in paper (B) Alkali consumption in digestion/cooking of bamboo is measured in terms of permanganate number (C) Bagasse fibre contains both lignin & cellulose (D) Presence of sodium sulphate in pulp makes the pulp bleachability poor

Description : Pick out the wrong statement. (A) Fibrillation of fibre during paper manufacture is done to develop the strength in paper (B) Alkali consumption in digestion/cooking of bamboo is measured in terms ... both lignin & cellulose (D) Presence of sodium sulphate in pulp makes the pulp bleachability poor

Last Answer : (D) Presence of sodium sulphate in pulp makes the pulp bleachability poor

Cellulose content of bamboo and ideal fibrous raw material for the manufacture of paper is __________ percent. (A) 10 (B) 50 (C) 80 (D) 95

Description : Cellulose content of bamboo and ideal fibrous raw material for the manufacture of paper is __________ percent. (A) 10 (B) 50 (C) 80 (D) 95

Last Answer : (B) 50

How old is my browning 22 lever action?

Description : How old is my browning 22 lever action?

Last Answer : Without more information, like the model and serial number, wedon't have a clue. Get that information and contact BrowningCustomer service (see their website) and they can tell you.

Swelling after RCT is mainly caused by (Being asked as: What is the most frequent cause of pain which occurs several days after obturation?, too): A. Entrapped Bacteria, or the presence of bacteria in the periapical region. B. Underfilling the root canal system C. Overfilled root canal

Description : Swelling after RCT is mainly caused by (Being asked as: What is the most frequent cause of pain which occurs several days after obturation?, too): A. Entrapped Bacteria, or the presence of bacteria in the periapical region. B. Underfilling the root canal system C. Overfilled root canal

Last Answer : A. Entrapped Bacteria, or the presence of bacteria in the periapical region.

Have you ever organized your books by the color of the dust jacket?

Description : Have you ever organized your books by the color of the dust jacket?

Last Answer : Having kids means to abandon all hope of even finding a book when needed let alone color coding them in the shelf. I will admit that such organization is rather admirable though.

How often should you use aeration on your lawn?

Description : How often should you use aeration on your lawn?

Last Answer : There isn't a set rule for how often you should aerate. However a simple test is to take a screwdrive and stick it into the soil. If it goes in easily your lawn is fine. If it doesn't then you need to aerate.

Lawn Aeration: The Secret To A Great Yard?

Description : Lawn Aeration: The Secret To A Great Yard?

Last Answer : Whenever you see a great looking yard, you can be sure thatthose people know about lawn aeration. Lawn aeration is the processwhere holes are punched into your lawn to let water, ... Aeration gives the weeds morenutrients and oxygen, allowing them to thrive and multiply. Othertimes lawn aerati

Lawn Aeration: Keep Your Lawn Healthy?

Description : Lawn Aeration: Keep Your Lawn Healthy?

Last Answer : Lawn aeration can be one of the best things for getting and maintaining a healthy, green lawn. This process involves making holes in the surface of the lawn and then pulling out the core that is produced. ... and to take in more water and oxygen.2.Not only does aerating help water and air get to

Lawn Aeration: Making A Lawn Beautiful?

Description : Lawn Aeration: Making A Lawn Beautiful?

Last Answer : Lawn aeration is an overlooked, but simple and effective way ofmaintaining a beautiful lawn. The need for lawn aeration is basic:as grass grows the roots become compact and dense. If they becomestoo ... often charge $50-$100. For $20-$30anyone can purchase a hand-held tool that has four prong

Why does lawn aeration matter?

Description : Why does lawn aeration matter?

Last Answer : Lawn aeration is good for your lawn on many levels. For one, it helps the ground to take in more water. It also allows the grass to absorb minerals and nutrients that it needs quicker. Why does lawn aeration matter? Enter your answer hereWhy does lawn aeration matter?...

How does lawn aeration help?

Description : How does lawn aeration help?

Last Answer : Lawn aeration allows air to get to the roots of your grass. So you can strengthen the roots of your grass by aeration.

What is the purpose of lawn aeration?

Description : What is the purpose of lawn aeration?

Last Answer : Lawn aeration is the process of creating small holes throughout the area of a yard. This helps to allow oxygen to get to the roots of the lawn, as well as fertilizers and nutrients. It can also ... roots have an easier time growing. Aeration is done with small machines the size of a lawn mower.

What does lawn aeration do for your yard?

Description : What does lawn aeration do for your yard?

Last Answer : Lawn aeration is when you make holes in your lawn using special equipment. The benefits of this are it breaks up thatch, it breaks up tight soil which allows the root system to grow and oxygen can get to the roots better, allowing them to breathe.

What is lawn aeration, and why should I consider it for my yard?

Description : What is lawn aeration, and why should I consider it for my yard?

Last Answer : Over time, a lawn can get packed down and dense with grass roots so that water has a difficult time leaching down through the soil. Lawn aeration opens up the surface by punching holes in the ... opening up the surface. Many lawncare experts claim that the secret to a good-looking lawn is aeration.

The term reactor referred to in waste water treatment is – (1) Vessel (2) Settling tank (3) Clarifier (4) Aeration tank

Description : The term reactor referred to in waste water treatment is – (1) Vessel (2) Settling tank (3) Clarifier (4) Aeration tank

Last Answer : (4) Aeration tank Explanation: Reactors are industrial processing tanks for the treatment of wastewater. The tanks have a "flow through" system, with raw wastewater (influent) coming in at one end and ... out the other. While one tank is in settle/ decant mode the other is aerating and filling.

In the activated sludge process A. Aeration is continued till stability B. Aeration is done with an admixture of previously aerated sludge C. Sludge is activated by constant stirring D. Water is removed by centrifugal action

Description : In the activated sludge process A. Aeration is continued till stability B. Aeration is done with an admixture of previously aerated sludge C. Sludge is activated by constant stirring D. Water is removed by centrifugal action

Last Answer : ANS: B

Road grade bitumen is produced from vacuum residue by its (A) Aeration (B) Pyrolysis (C) Hydrogenation (D) Steam reforming

Description : Road grade bitumen is produced from vacuum residue by its (A) Aeration (B) Pyrolysis (C) Hydrogenation (D) Steam reforming

Last Answer : (D) Steam reforming

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)

Soil mulch is useful in: (A) Minimize evaporation losses (B) Improving aeration (C) Improving drainage (D) Removing weeds

Description : Soil mulch is useful in: (A) Minimize evaporation losses (B) Improving aeration (C) Improving drainage (D) Removing weeds

Last Answer : (A) Minimize evaporation losses

Secondary dormancy in non dormant seeds is due to: j. Temperature a. Moisture b. Aeration c. Ligh

Description : Secondary dormancy in non dormant seeds is due to: j. Temperature a. Moisture b. Aeration c. Ligh

Last Answer : Temperature

Which of the following soils has self-aeration capacity? (a) Alluvial soil (b) Black soil (c) Red soil (d) Mountain soil

Description : Which of the following soils has self-aeration capacity? (a) Alluvial soil (b) Black soil (c) Red soil (d) Mountain soil

Last Answer : (b) Black soil

Replenishment of dissolved oxygen in water stream polluted with industrial waste occurs by (A) Natural aeration of water stream (B) Photosynthetic action of algae (C) Both (A) & (B) (D) Neither (A) nor (B)

Description : Replenishment of dissolved oxygen in water stream polluted with industrial waste occurs by (A) Natural aeration of water stream (B) Photosynthetic action of algae (C) Both (A) & (B) (D) Neither (A) nor (B)

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

Removal of __________ is accomplished by aeration of water. (A) Dissolved gases (B) Suspended solids (C) Dissolved solids (D) None of these

Description : Removal of __________ is accomplished by aeration of water. (A) Dissolved gases (B) Suspended solids (C) Dissolved solids (D) None of these

Last Answer : (A) Dissolved gases

Infective bacteria in water is killed by the __________ process. (A) Sterilisation (B) Aeration (C) Disinfection (D) None of these

Description : Infective bacteria in water is killed by the __________ process. (A) Sterilisation (B) Aeration (C) Disinfection (D) None of these

Last Answer : (A) Sterilisation

Pick out the false statement pertaining to water treatment(A) Aeration of water is effective in CO2removal(B) The zeolite water softening process reduces the hardness of water by notmore than 50%(C) Sodium sulphate or sodium carbonate do not cause hardness in water(D) Water with pH value less than 7, is acidic.

Description : Pick out the false statement pertaining to water treatment. (A) Aeration of water is effective in CO2 removal (B) The zeolite water softening process reduces the hardness of water by not more than 50% (C ... carbonate do not cause hardness in water (D) Water with pH value less than 7, is acidic

Last Answer : (B) The zeolite water softening process reduces the hardness of water by not more than 50%

Dissolved carbon dioxide, can be removed from the supply main by (A) Sedimentation (B) Aeration (C) Chlorination (D) Coagulation

Description : Dissolved carbon dioxide, can be removed from the supply main by (A) Sedimentation (B) Aeration (C) Chlorination (D) Coagulation

Last Answer : (B) Aeration

Aeration of water is done to remove (A) Odour (B) Colour (C) Bacterias (D) Turbidity

Description : Aeration of water is done to remove  (A) Odour  (B) Colour  (C) Bacterias  (D) Turbidity 

Last Answer : (A) Odour