How to increase percent yield? How to improve experiment? Nitration of Veratrole?

How to increase percent yield? How to improve experiment? Nitration of Veratrole?
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Can you provide a bit more detail about the experimental conditions and the precise reaction you were attempting? As a general rule, most reactions do not result in 100% yield, and so, this might be the limits of the reaction. Alternatively, one of your reagents was limiting, and caused a reduced yield.
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What is the balanced veratrole and nitric acid? Also, would you expect ortho-dimethoxybenzene or para-dimethoxybenzene to be nitrated more readily?

Description : What is the balanced veratrole and nitric acid? Also, would you expect ortho-dimethoxybenzene or para-dimethoxybenzene to be nitrated more readily?

Last Answer : answer:1. Are you asking for the balanced equation? 2. What determines how easily something is nitrated? Draw out the two structures and look at them.

Tissue culture is a good technique to a) Cross two varieties b) Rapidly increase the size of a trees by strengthening the stem c) Eliminate virus d) Improve yield of crops

Description : Tissue culture is a good technique to a) Cross two varieties b) Rapidly increase the size of a trees by strengthening the stem c) Eliminate virus d) Improve yield of crops 

Last Answer : c) Eliminate virus 

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Description : Scientists has genetically modified photosynthesis process to increase crop yield by - (1) 11 Percent (2) 12 Percent (3) 15 Percent (4) 17 Percent

Last Answer : (3) 15 Percent Explanation: Photosynthesis, they convert water and carbon dioxide (CO2) to sugar and oxygen with the help of sunlight.

Arrange the following in decreasing order of rate of nitration :-

Description : Arrange the following in decreasing order of rate of nitration :-

Last Answer : Arrange the following in decreasing order of rate of nitration :- A. `b gt a = c gt d` B. `d gt a = c gt b` ... gt a gt c gt d` D. `a gt c gt d gt b`

In the nitration of benzene with a mixture of conc. `HNO_(3)` and conc. `H_(2)SO_(4)`, the active species involved is :

Description : In the nitration of benzene with a mixture of conc. `HNO_(3)` and conc. `H_(2)SO_(4)`, the active species involved is :

Last Answer : In the nitration of benzene with a mixture of conc. `HNO_(3)` and conc. `H_(2)SO_(4)`, ... ion B. nitrate ion C. nitronium ion D. nitrogen dioxide

Nitration of benzene is:

Description : Nitration of benzene is:

Last Answer : Nitration of benzene is: A. nucleophilic substitution B. nucleophilic addition C. electrophilic substitution D. free radical substitution

Which one of the following compounds would undergo nitration with greatest ease

Description : Which one of the following compounds would undergo nitration with greatest ease

Last Answer : Which one of the following compounds would undergo nitration with greatest ease A. benzene B. phenol C. nitrobenzene D. benzoic acid

Solvent deoiling process is used for separating oil and soft wax from hard wax. Methyl iso-butyl ketone and methyl ethyl ketone (MEK) are two commonly used deoiling solvents. Use of former as the deoiling solvent has the advantages of the (A) Elimination of solvent drying facility (B) Higher nitration temperature (C) Lower solvent dilution ratio (D) All (A), (B) & (C)

Description : Solvent deoiling process is used for separating oil and soft wax from hard wax. Methyl iso-butyl ketone and methyl ethyl ketone (MEK) are two commonly used deoiling solvents. Use of former as the deoiling solvent ... nitration temperature (C) Lower solvent dilution ratio (D) All (A), (B) & (C)

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

Out of benzene, m–dinitrobenzene and toluene which will undergo nitration most easily and why?

Description : Out of benzene, m–dinitrobenzene and toluene which will undergo nitration most easily and why?

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Out of benzene, m–dinitrobenzene and toluene which will undergo nitration most easily and why?

Description : Out of benzene, m–dinitrobenzene and toluene which will undergo nitration most easily and why?

Last Answer : Ans. -CH3 group is electron donating while –NO2 group is electron withdrawing. Therefore, maximum electron density will be in toluene, followed by benzene and at least in m-dinitrobenzene. Therefore, the ease of nitration decreases in the order: Toluene> benzene> m-dinitrobenzene

Although — NH2 gp is an ortho and para directing gp, nitration of aniline gives along with ortho and para, meta derivatives also.

Description : Although — NH2 gp is an ortho and para directing gp, nitration of aniline gives along with ortho and para, meta derivatives also.

Last Answer : Nitration is carried out with a mixture of Conc. NO3 + Conc. H2 SO4 (nitrating mix). In the presence of these acids, most of aniline gets protonated to form anilinium ion. Therefore, in the ... is m-directing and deactivating hence a mixture of all three-ortho, para and meta derivatives is formed.

Drug called ‘Heroin’ is synthesised by (a) nitration of morphine (b) methylation of morphine (c) acetylation of morphine (d) glycosylation of morphine.

Description : Drug called ‘Heroin’ is synthesised by (a) nitration of morphine (b) methylation of morphine (c) acetylation of morphine (d) glycosylation of morphine.

Last Answer : (c) acetylation of morphine

Naphthalene undergoes nitration with HNO3/H2SO4 at 60°C to give mainly (a) 1-Nitronaphthalene (b) 1,2-Dinitronaphthalene (c) 2-Nitronaphthalene (d) 1,5-Dinitronaphthalene

Description : Naphthalene undergoes nitration with HNO3/H2SO4 at 60°C to give mainly (a) 1-Nitronaphthalene (b) 1,2-Dinitronaphthalene (c) 2-Nitronaphthalene (d) 1,5-Dinitronaphthalene

Last Answer : 1-Nitronaphthalene

Nitration of nitrobenzene with HNO3/H2SO4 gives : (a) m-dinitrobenzene (b) o-dinitrobenzene (c) p-dinitrobenzene (d) m-nitrobenzenesulfonic acid

Description : Nitration of nitrobenzene with HNO3/H2SO4 gives : (a) m-dinitrobenzene (b) o-dinitrobenzene (c) p-dinitrobenzene (d) m-nitrobenzenesulfonic acid

Last Answer : m-dinitrobenzene

Which of the following statements is False/Incorrect about nitrobenzene? (a) is formed by nitration of benzene at temperatures below 60°C. (b) can be further nitrated to give m-dinitrobenzene. (c) can be oxidized with KMnO4 to give benzoic acid. (d) can be reduced with Sn/HCl to give aniline.

Description : Which of the following statements is False/Incorrect about nitrobenzene? (a) is formed by nitration of benzene at temperatures below 60°C. (b) can be further nitrated to give m-dinitrobenzene. (c) can be oxidized with KMnO4 to give benzoic acid. (d) can be reduced with Sn/HCl to give aniline.

Last Answer : can be oxidized with KMnO4 to give benzoic acid

Which of the following compounds undergoes nitration most readily? (a) Benzene (b) Toluene (c) Nitrobenzene (d) Benzoic acid

Description : Which of the following compounds undergoes nitration most readily? (a) Benzene (b) Toluene (c) Nitrobenzene (d) Benzoic acid

Last Answer : Toluene

Compared to benzene, nitration of toluene takes place at (a) Same rate (b) Faster rate (c) Slower rate(d) Can not predict

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Last Answer : (B) Toluene

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Last Answer : (B) Desorption

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Last Answer : Need answer

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Last Answer : Production factor (PF) = 28750/34000 = 0.846 …………………….1 mark Ref year equivalent energy (RYEE) = Ref Year Energy Use (RYEU) x PF   = 27,200 x 0.846= 23011MWh

Can the Percent yield be more than 100%? Why?

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Last Answer : (b) Radius (or diameter) will increase

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In Newton’s rings experiment, if monochromatic source of light is replaced by another monochromatic source of higher wavelength. What will be the effect on radius (or diameter)? (a) Radius (or diameter) will decrease (b) Radius (or diameter) will increase (c) There will be no effect (d) Radius (or diameter) will remain constant but there will be more brightness

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Last Answer : (b) Radius (or diameter) will increase

Suppose marketers at Renault need to determine the effects of an increase in the advertising budget on sales of the Clio. In setting up an experiment, the independent variable would be: A)sales B)price C)advertising expense D)production cost E)wholesale purchases

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Last Answer : I use this method and I have a harvest up to 3 times larger http://www.bezvarady.eu/brambory-pestovane-v-sudu.html

How to increase the yield of peppers

Description : Do you have any advice to produce more peppers?

Last Answer : I always pick the first pepper and then I have a bigger crop. Otherwise, the plant gives all the strength to the first pepper.

How would you increase the yield of maize crop? (a) Evolve high yielding varieties of seeds to suit different agroclimatic regions (b) Develop high yielding varieties (c) Develop disease-resistant varieties (d) Develop early and very early maturing varieties suitable for rainfall areas

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Last Answer : Ans: (a)