Paper turns yellowish with age due to the presence of the chemical

Paper turns yellowish with age due to the presence of the chemical
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1 Answer

Answer :

lignin.
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Related questions

Concentrated nitric acid upon long standing turns yellowish-brown due to the formation of :

Description : Concentrated nitric acid upon long standing turns yellowish-brown due to the formation of :

Last Answer : Concentrated nitric acid upon long standing turns yellowish-brown due to the formation of : A. NO B. `NO_(2)` C. `N_(2)O` D. `N_(2)O_(4)`

Concentrated nitric acid upon long standing turns yellowish-brown due to the formation of :

Description : Concentrated nitric acid upon long standing turns yellowish-brown due to the formation of :

Last Answer : Concentrated nitric acid upon long standing turns yellowish-brown due to the formation of : A. NO B. `NO_(2)` C. `N_(2)O` D. `N_(2)O_(4)`

One property of ammonia is – (1) It is insoluble in water (2) it is a odourless gas (3) It is a yellowish gas (4) Its aqueous solution turns red litmus blue

Description : One property of ammonia is – (1) It is insoluble in water (2) it is a odourless gas (3) It is a yellowish gas (4) Its aqueous solution turns red litmus blue

Last Answer : (4) Its aqueous solution turns red litmus blue Explanation: The main use of litmus is to test whether a solution is acidic or basic. For instance, ammonia gas, which is alkaline, colours the red litmus paper blue.

One property of ammonia is (1) It is insoluble in water (2) It is a odourless gas (3) It is a yellowish gas (4) Its aqueous solution turns red litmus blue

Description : One property of ammonia is (1) It is insoluble in water (2) It is a odourless gas (3) It is a yellowish gas (4) Its aqueous solution turns red litmus blue

Last Answer :  Its aqueous solution turns red litmus blue

Coke oven gas burns with a yellowish flame, because of the presence of (A) CO2 (B) CH4 (C) H2(D) NH3

Description : Coke oven gas burns with a yellowish flame, because of the presence of (A) CO2 (B) CH4 (C) H2 (D) NH3

Last Answer : (B) CH4

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.

If lime water is kept in the air, it turns milky due to presence of – (1) Carbondioxide (2) Nitrogen (3) Oxygen (4) Sulphurdioxide

Description : If lime water is kept in the air, it turns milky due to presence of – (1) Carbondioxide (2) Nitrogen (3) Oxygen (4) Sulphurdioxide

Last Answer : (1) Carbondioxide Explanation: Lime water is calcium hydroxide (Ca(OH)2). When carbon dioxide is passed into it, it turns milky because of the formation of calcium carbonate: Ca(OH)2 + CO2 = CaCO3 +H2O

If lime water is kept in the air, it turns milky due to presence of : (1) Carbondioxide (2) Nitrogen (3) Oxygen (4) Sulphurdioxide

Description : If lime water is kept in the air, it turns milky due to presence of : (1) Carbondioxide (2) Nitrogen (3) Oxygen (4) Sulphurdioxide

Last Answer : Carbondioxide

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

A young infant may be feeding entirely on mother’s milk which is white in colour but the stools which the infant passes out is quite yellowish. What is this yellow colour due to? (a) Bile pigments passed through bile juice (b) Undigested milk protein casein (c) Pancreatic juice poured into duodenum (d) Intestinal juice

Description : A young infant may be feeding entirely on mother's milk which is white in colour but the stools which the infant passes out is quite yellowish. What is this yellow colour due to? (a) ... bile juice (b) Undigested milk protein casein (c) Pancreatic juice poured into duodenum (d) Intestinal juice

Last Answer : (a) Bile pigments passed through bile juice

A green coloured solid compound ̳X‘, gets oxidized to reddish brown solid in presence of air. ̳X‘ on heating gives brown coloured solid ̳Y‘ and two pungent smelling gases ̳A‘ and ̳B‘. ̳A‘ turns acidified potassium dichromate solution green. Name ̳X‘, ̳Y‘, ̳A‘ , ̳B‘ and type of Reaction. (a) CuSO 4 , CuO, SO 2 , SO 3 , decomposition (b) FeSO 4 , Fe, SO 2 , SO 3 , decomposition (c) FeSO 4 , Fe 2 O 3, SO 2 , SO 3 , decomposition (d) FeSO 4 , Fe 2 O 3 , SO 3 , SO 2 , decomposition

Description : A green coloured solid compound ̳X , gets oxidized to reddish brown solid in presence of air. ̳X on heating gives brown coloured solid ̳Y and two pungent smelling gases ̳A and ̳B . ̳A turns acidified potassium ... , SO 3 , decomposition (d) FeSO 4 , Fe 2 O 3 , SO 3 , SO 2 , decomposition

Last Answer : (c) FeSO 4 , Fe 2 O 3, SO 2 , SO 3 , decomposition

Bases turns red litmus paper into?

Description : Bases turns red litmus paper into?

Last Answer : Blue

Acid turns blue litmus paper to?

Description : Acid turns blue litmus paper to?

Last Answer : Red

Dry ammonia gas has no action on litmus paper but a solution of ammonia in water turns litmus paper color. Why?

Description : Dry ammonia gas has no action on litmus paper but a solution of ammonia in water turns litmus paper color. Why?

Last Answer : Answer. A solution of ammonia in water produces OH– ions which make the solution basic and turn red litmus paper blue.

What turns tetul blue litmus paper into what ?

Description : What turns tetul blue litmus paper into what ?

Last Answer : Tetul converts blue litmus into red litmus.

A colorless salt gives violet colour to Bunsen flame and also turns moisture litmus paper blue. It is :

Description : A colorless salt gives violet colour to Bunsen flame and also turns moisture litmus paper blue. It is :

Last Answer : A colorless salt gives violet colour to Bunsen flame and also turns moisture litmus paper blue. It is : A. `Na_(2) ... C. `NaNO_(3)` D. `K_(2)CO_(3)`

A gas has smell like rotten egg and turns lead acetate paper black. The gas is :

Description : A gas has smell like rotten egg and turns lead acetate paper black. The gas is :

Last Answer : A gas has smell like rotten egg and turns lead acetate paper black. The gas is : A. `NO_(2)` B. `H_(2)S` C. `CO_(2)` D. `SO_(2)`

Gas X and Gas Y in solution state react to give a turns substance Z. X has unpleasant odour and turns lead acetate paper black. In the first reaction

Description : Gas X and Gas Y in solution state react to give a turns substance Z. X has unpleasant odour and turns lead acetate paper black. In the first reaction

Last Answer : Gas X and Gas Y in solution state react to give a turns substance Z. X has unpleasant odour and turns lead ... )Orarr` D. `SO_(2)+H_(2)O_(2)rarr`

Gas X and Gas Y in solution state react to give a turns substance Z. X has unpleasant odour and turns lead acetate paper black. In the first reaction

Description : Gas X and Gas Y in solution state react to give a turns substance Z. X has unpleasant odour and turns lead acetate paper black. In the first reaction

Last Answer : Gas X and Gas Y in solution state react to give a turns substance Z. X has unpleasant odour and turns lead acetate ... 2)` C. `H_(2)S` D. `SO_(3)`

Gas X and Gas Y in solution state react to give a turns substance Z. X has unpleasant odour and turns lead acetate paper black. In the first reaction

Description : Gas X and Gas Y in solution state react to give a turns substance Z. X has unpleasant odour and turns lead acetate paper black. In the first reaction

Last Answer : Gas X and Gas Y in solution state react to give a turns substance Z. X has unpleasant odour and turns lead acetate ... SO_(2)` D. `SO_(2) and O_(3)`

(i) `KI+H_(2)O+O_(3)rarrA+B+O_(2)` (A turns moist starch paper blue, B turns red litmus blue) (ii) A(dry)`+O_(3)rarrX+O_(2)` What is true about X in t

Description : (i) `KI+H_(2)O+O_(3)rarrA+B+O_(2)` (A turns moist starch paper blue, B turns red litmus blue) (ii) A(dry)`+O_(3)rarrX+O_(2)` What is true about X in t

Last Answer : (i) `KI+H_(2)O+O_(3)rarrA+B+O_(2)` (A turns moist starch paper blue, B turns red litmus blue) ... )` D. Average oxidation state of iodine in X is `+5`

Which of the following turns lead acetate paper black?

Description : Which of the following turns lead acetate paper black?

Last Answer : Which of the following turns lead acetate paper black? A. `SO_(2)` B. `SO_(3)` C. `H_(2)S` D. `H_(2)SO_(4)`

If a paper moistened with lead acetate for five minutes when placed in manhole turns black. The sewer certainly contains A. Hydrogen sulphide B. Carbon dioxide C. Methane D. Oxygen

Description : If a paper moistened with lead acetate for five minutes when placed in manhole turns black. The sewer certainly contains A. Hydrogen sulphide B. Carbon dioxide C. Methane D. Oxygen

Last Answer : ANS: A

Blue Litmus Paper turns _______ on contact with an acidic solution

Description : Blue Litmus Paper turns _______ on contact with an acidic solution

Last Answer : Red

The inductance of a long solenoid of length 1000 mm wound uniformly with 3000 turns on a cylindrical paper

Description : The inductance of a long solenoid of length 1000 mm wound uniformly with 3000 turns on a cylindrical paper tube of 60 mm diameter is  (A) 3.2 µH (B) 3.2 mH (C) 32.0 mH (D) 3.2 H

Last Answer : The inductance of a long solenoid of length 1000 mm wound uniformly with 3000 turns on a cylindrical paper tube of 60 mm diameter is 32.0 mH

Have you tried those yellowish night vision glasses and like them>?

Description : Have you tried those yellowish night vision glasses and like them>?

Last Answer : Those TV commercials are nonsense. I get angry every time I see them. They supposedly slide the glasses over the camera lens and Bam! clear as day. I call BS! Those are merely yellow filters. They are not night vision. Please don’t give those scam artists your money.

A thick yellowish liquid that forms a crusty outer shell.

Description : A thick yellowish liquid that forms a crusty outer shell.

Last Answer : What is creme brulee?

why are my cactus turning yellowish light green color??

Description : why are my cactus turning yellowish light green color??

Last Answer : Need Answer

if the meat of the zucchini has a yellowish tint to it is it still good for canning

Description : if the meat of the zucchini has a yellowish tint to it is it still good for canning

Last Answer : Need Answer

how to remove pineapple from plant has turned yellowish brown?

Description : how to remove pineapple from plant has turned yellowish brown?

Last Answer : Need Answer

What disease would cause some of our pygmy oleanders to have stunted, yellowish growth and no flowers?

Description : What disease would cause some of our pygmy oleanders to have stunted, yellowish growth and no flowers?

Last Answer : A sudden frost could hrt them. next time you hear frost............cover them up for the night then take the covers off in the morning.

What makes my camellia leaves turn yellowish on the inside?

Description : What makes my camellia leaves turn yellowish on the inside?

Last Answer : Need Answer

does the yellowish red stems mean there is a fungus or disease

Description : does the yellowish red stems mean there is a fungus or disease

Last Answer : Need Answer

why do my hollyhock leaves turn yellowish and get holes in them

Description : why do my hollyhock leaves turn yellowish and get holes in them

Last Answer : ph should be 6.0-8.0....................ring it with old horsemanure....around the plant not on the plant.....mulch at the plant..................remove the yellow leaves and bag them & toss ... goes down and the plant cools off.................shake & spray it on & under the leaves. Happy Summer.

Does anyone know how to get an antique (yellowish) effect on the sheets as soon as possible?

Description : I want to give the papers an old-fashioned, yellowish effect. I have heard and read that this effect can also be achieved with coffee and tea. But how? Can anyone describe it to me? Thanks in advance!   

Last Answer : If you need a very quick solution, I think it's best to buy one at a hobby store. Anyway, I read a solution to brush the plate with strong brewed tea and then dry it. Of course, the sheet will most ... iron. The other solution is to UV light the paper, but I don't think it's such a quick process. 

Central pit of yellowish pigmented macula lutea is

Description : Central pit of yellowish pigmented macula lutea is

Last Answer : Central pit of yellowish pigmented macula lutea is

Central pit of yellowish pigmented macula lutea is

Description : Central pit of yellowish pigmented macula lutea is

Last Answer : Central pit of yellowish pigmented macula lutea is

what gives a whale shark its yellowish skin?

Description : what gives a whale shark its yellowish skin?

Last Answer : oil

what gives a whale shark its yellowish skin?

Description : what gives a whale shark its yellowish skin?

Last Answer : oil

Main symptoms of congenital erythropoietic porphyria is (A) Yellowish teeth (B) Photosensitivity (C) Abdominal pain (D) Brownish urine

Description : Main symptoms of congenital erythropoietic porphyria is (A) Yellowish teeth (B) Photosensitivity (C) Abdominal pain (D) Brownish urine

Last Answer : Answer : B

The type of cyst contains yellowish sebum and is commonly found on the scalp, vulva, and scrotum. A. papule B. sebaceous cyst C. ulcer D. vesicle

Description : The type of cyst contains yellowish sebum and is commonly found on the scalp, vulva, and scrotum. A. papule B. sebaceous cyst C. ulcer D. vesicle

Last Answer : Ans: B

The colour of loamy soil is – (1) Greenish brown (2) Bluish green (3) Yellowish brown (4) Blackish brown

Description : The colour of loamy soil is – (1) Greenish brown (2) Bluish green (3) Yellowish brown (4) Blackish brown

Last Answer : (4) Blackish brown Explanation: Loam encompasses a variety of soil types, some granulated and nicely draining, while others may be thicker and have the consistency of mud. Most loam soils are a brown or black ... yet the drainage is well. Loamy soil is composed of 40 % sand, 40% silt and 20% clay.

What is the difference between a sodium vapour lamp, Which gives out a yellowish colour illumination, and a mercury vapour lamp that gives out a white colour illumination?

Description : What is the difference between a sodium vapour lamp, Which gives out a yellowish colour illumination, and a mercury vapour lamp that gives out a white colour illumination?

Last Answer : Answer I: The light in Sodium Vapour lamp is from an atomic emission process whereas in Mercury Vapour Lamp it is, finally, from fluorescence emission. The mechanism of light emission in a sodium ... from a fluorescent lamp is moderate (60 lumens/watt) while the color-rendering index is high.

Colostrum, the yellowish fluid, secreted by mother during the initial days of lactation is very essential to impart immunity to the new born infants because it contains (a) immunoglobulin A (b) natural killer cells (c) monocytes (d) macrophages.

Description : Colostrum, the yellowish fluid, secreted by mother during the initial days of lactation is very essential to impart immunity to the new born infants because it contains (a) immunoglobulin A (b) natural killer cells (c) monocytes (d) macrophages.

Last Answer : (a) immunoglobulin A

When the plants are grown in magnesium deficient but urea rich soil, the symptoms expressed are (a) yellowish leaves (b) colourless petiole (c) dark green leaves (d) shoot apex die.

Description : When the plants are grown in magnesium deficient but urea rich soil, the symptoms expressed are (a) yellowish leaves (b) colourless petiole (c) dark green leaves (d) shoot apex die.

Last Answer : (a) yellowish leaves

Lignite is (A) A high rank coal (B) A coking coal (C) Can be used for gasification and steam generation (D) A black banded coal which burns with a non-smoky yellowish flame

Description : Lignite is (A) A high rank coal (B) A coking coal (C) Can be used for gasification and steam generation (D) A black banded coal which burns with a non-smoky yellowish flame

Last Answer : (C) Can be used for gasification and steam generation

If in the rice crop field, the leaves turn narrow, short, erect, and lemon yellowish and the entire field may appear yellowish, then the rice may be deficient of which nutrient? a. Calcium b. Potassium c. Nitrogen d. Phosphorus

Description : If in the rice crop field, the leaves turn narrow, short, erect, and lemon yellowish and the entire field may appear yellowish, then the rice may be deficient of which nutrient? a. Calcium b. Potassium c. Nitrogen d. Phosphorus

Last Answer : c. Nitrogen

_____ is a widespread and highly contagious staphylococcal skin disease with thin-walled blisters oozing a yellowish fluid that forms a crust. a. furuncle b. carbuncles c. impetigo d. abscess

Description : _____ is a widespread and highly contagious staphylococcal skin disease with thin-walled blisters oozing a yellowish fluid that forms a crust. a. furuncle b. carbuncles c. impetigo d. abscess

Last Answer : c. impetigo

In children, this skin disease is characterized by the production of thin-walled blisters oozing a yellowish fluid and forming yellowish- brown flakes. a. Toxic shock syndrome b. Scalded skin syndrome c. Erysipelas d. Impetigo

Description : In children, this skin disease is characterized by the production of thin-walled blisters oozing a yellowish fluid and forming yellowish- brown flakes. a. Toxic shock syndrome b. Scalded skin syndrome c. Erysipelas d. Impetigo

Last Answer : d. Impetigo

By adding 1 ml of Orthotolidine solution to 100 ml chlorinated water taken after contact period, the residual chlorine makes the colour of solution (A) Yellowish (B) Greenish (C) Bluish (D) Reddish

Description : By adding 1 ml of Orthotolidine solution to 100 ml chlorinated water taken after contact period, the residual chlorine makes the colour of solution (A) Yellowish (B) Greenish (C) Bluish (D) Reddish

Last Answer : (A) Yellowish