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by FRACTIONAL DISTILLATION

It TAKES more labour to CREATE a LARGE crop, and the increased crop itself creates the ... ADDITION of some of the ingredients of plants.

Phosphorus is a non-metal that sits just below nitrogen in group 15 of the periodic table. This ELEMENT exists in several forms, of which white and red are the best known.White phosphorus is definitely the more exciting of the two. As it glows in the dark, is dangerously flammable in the air above 30 degrees, and is a deadly poison. Red phosphorus however has none of these fascinating properties.So where did it all begin? Phosphorus was first made by Hennig Brandt in Hamburg in Germany in 1669. When he evaporated urine and heated the residue until it was red hot. Glowing phosphorus vapour came off and he condensed it under water. And for more than 100 years most phosphorus was made this way. This was until people realised that bone was a great source of phosphorus. Bone can be dissolved in sulfuric acid to form phosphoric acid, which is then heated with charcoal to form white phosphorus.White phosphorus has found a range of rather nasty applications in warfare. It was used in the 20th century in TRACER bullets, fire bombs, and smoke grenades. The scattering of phosphorus fire bombs over cities in World War II caused widespread DEATH and destruction. In July 1943, Hamburg was subject to several air raids in which 25,000 phosphorus bombs were dropped over vast areas of the city. This is rather ironically considering where phosphorus was first made.Another group of warfare agents based on phosphorus are nerve gases such as sarin. Sarin is a fluorinated phosphonate that was used by Iraq against Iran in the early to mid-1980s. And was also released in a Tokyo subway in 1995, killing 12 people and harming nearly a thousand others.White phosphorus has also found a wide range of other uses. One of these was in phosphorus matches that were first sold in Stockton-on-Tees in the UK in 1827. This created a whole new industry of cheap lights - but at a terrible cost. Breathing in phosphorus vapour led to the industrial disease phossy JAW, which slowly ate away the jaw bone. This condition particularly afflicted the girls who made phosphorus matches. So these were eventually banned in the early 1900s and were replaced by MODERN matches which use either phosphorus sulfide or red phosphorus.As well as in matches, today phosphorus has found other uses in lighting. Magnesium phosphide is the basis of self-igniting warning flares used at sea. When it reacts with water it forms the spontaneously flammable gas, diphosphine which triggers the lighting of the flare.Super pure phosphorus is also used to make light emitting diodes. These LEDs contain metal phosphides such as those of gallium and indium.

tion:Quantum numbers are important because they can be used to determine the electron configuration of an atom and the probable location of the atom's electrons. Quantum numbers are ALSO used to determine other characteristics of atoms, such as IONIZATION ENERGY and the atomic radius.

LawAt Constant pressure for a fixed amount of GAS VOLUME of gas is linearly corelated to TEMPERATURE in °C

As E=hc/wavelengthE1= hc/6000E2= hc/2000now E1/E2 SOLVE this and you will GET 1:3

in FIRST zn is NEUTRAL and has its oxidation NUMBER as 0in HCL has highest oxidation number as 3

l=On=4m= 0S= +1/2 -1/2Explanation: these are the all FOUR SET of of QUANTUM no.s

The MOLES of glucose in 250 GRAMS are 1.388 THUS the cost of glucose per mole = Rs 28.8 per molExplanation:Convert the mass given into moles by relation MOLAR mass of glucose can be calculated by adding the atomic mass of each atom in the glucose .:= (12×6) + (12×1) + (16×6)=180 gramTHUS the number of moles = 250/180= 1.388 molTo find the cost of one mole divide the total cost by the total number of moles= 40/1.388 = 28.8 RUPEE

hiiiyour answer is here !Explanation:Phosphorus was first made by Hennig Brandt at Hamburg in 1669 when he evaporated urine and heated the residue until it was red HOT, whereupon phosphorus vapour distilled which he collected by condensing it in water. Brandt kept his discovery secret, thinking he had discovered the PHILOSOPHER’s Stone that could turn base metals into gold. When he ran out of MONEY, he sold phosphorus to Daniel Kraft who exhibited it around Europe including London where Robert Boyle was fascinated by it. He discovered how it was produced and investigated it systematically. (His assistant Ambrose Godfrey set up his own business making and selling phosphorus and became rich.)When it was realised that bone was calcium phosphate, and could be used to MAKE phosphorus, and it became more widely available. Demand from match manufacturers in the 1800S ensured a ready market.follow me!

by DISTILLATION METHOD.......

How do you convert ETHANE to ethyne? Step-1:—Conversion of ethane into ETHYL chloride. When ethane is HEATED with CHLORINE,ethyl chloride is OBTAINED. Step-2:—Dehydrohalogenation of ethyl chloride.

ambident nucleophile is an anionic nucleophile and NEGATIVE part delocalize by resonance over TWO unlike atom or two like ATOMS but NON equivalent atom.most common example of enolate and acetone FORM.

The sum of mole FRACTION is ALWAYS equal to 1.

In chemistrythe nucleus is a SMALL POSITIVE CHARGE part at the centre of an atom.almost the ENTIRE mass of an atom is CONCENTRATED in the nucleus.

No, deforestation can't be considered as areversible change. It is an IRREVERSIBLE change. It cannot take PLACE in REVERSE direction. Forests cannot be grown quickly.

tion:your ANSWERS are shown below:1. for a reaction a + 2b→c, RATE is given byr = k[a][b]2the order of reaction is :763correct5question was not answered2. in the reaction 2 a + b → a2 b, if the concentration of a is doubled and that of b is halved, then the rate of reaction willincrease 2 timescorrectdecrease 2 timesincrease 4 timesremain the samequestion was not answered3. the half-life of a first order reaction having rate constant k = 1.7 × 10–5s–1 is9.7 h12.1 h1.8 h11.3 hcorrectquestion was not answered4. the order of a reaction is said to be 2 with respect to a reactant x, whenthe reaction occurs in two stepsthe rate of the reaction is proportional to [x]the rate of the reaction is proportional [x]2correcttwo molecules of x are present in the STOICHIOMETRIC equationquestion was not answered5. a first order reaction is half completed in 45 minutes. how long does it need 99.9% of the reaction to be completed7.5 hourscorrect10 hours5 hours20 hoursquestion was not answered6. if the temperature is increased by 10ºc the rate of the reaction becomesten times lesstwo times lessten times moretwo times morecorrectquestion was not answered7. half life period of second order reaction isproportional to the initial concentration of reactantsinversely proportional to square of initial concentration of reactantsinversely proportional to initial concentration of reactantscorrectindependent of the initial concentration of reactantsquestion was not answered8. select the incorrect statement.reaction is a result of collision between the moleculesrate of reaction for a bimolecular elementary reaction is rate = \displaystyle {{z}_{{AB}}}{{e}^{{-{{e}_{a}}/rt}}}$collision theory is based on kinetic theory of gasescollision frequency is the number of collision per second per unit lengthcorrectquestion was not answered9. in a reaction, 2x→y, the concentration of x. decreases from 3.0 m to 1.5 m in 4 min. the rate of the reaction is3.75 × 10–1m min–10.187 m min–1correct1.87 m min–10.75 m min–1question was not answered10. during a chemical reaction with increase in time, rate of a reactiondecreasescorrectshow irregular trendsremains constantincreasesquestion was not answered11. rate constant depends oninitial concentrationtimenone of thesetemperaturecorrectquestion was not answered12. which ordering of compounds is according to the decreasing order of the oxidation state of nitrogen .no, hno3, nh4cl, n2hno3, nh4cl, no, n2hno3, no, nh4cl, n2hno3, no, n2, nh4clcorrectquestion was not answered13. when a reaction is progressingthe rate of the reaction goes on increasingthe concentration of the products goes on decreasingthe concentration of the reactants goes on decreasingcorrectthe reaction rate always remains constantquestion was not answered14. inversion of sucrose iszero order reactionsecond order reactionthird order reactionfirst order reaction correctquestion was not answered15. a first order reaction has a half-life period of 96.3 sec. at 0.10 mol litre–1 reactant. concentration, rate will be :10–4 m sec–110–1 m sec–16.93 × 10–1 m sec–110–3 m sec–1correctquestion was not answered© 2002 - 2019 chemistry classes, gurugram, india terms & CONDITIONS | privacy policy!

Explanation:Volume of GAS = 22.4 / MOLECULAR mass CO --> volume = 22.4/ 28CH4 --> volume = 22.4/ 16H2O --> volume =22.4/ 18NO --> volume = 22.4/ 30 We don't have to solve this SIMPLY check the denominator ...ONE with the lowest denominator has greatest volume Therefore Gas with Greatest volume= CH4gas with LEAST volume = NO

tion:ELEMENT are all around us.They 're in our food in our CARS,and house.But have you EVER THOUGHT about how element effect our ENVIRONMENT.

Fractional distillation is used for the purification of water as well as separating acetone and water. Fractional distillation is used in several INDUSTRIES like oil refineries and CHEMICAL plants mainly for purification and SEPARATION of MANY organic compounds.

2MnO4 (AQ) + 2I = 2MnO4 (s) + I2 (s) (in BASIC MEDIUM)

1)Turmeric can be used to cure an injury which is bleeding or if we get a CUT on our hand we should apply it 2)Pepper can be used in COOKING ,as well as in women protection as pepper SPRAY is very effective.3)lime is used to purify WATER for drinking (if you want lemon juices -then it provides energy and glucose to our body{as given in the question})hope it helps you MATE

tion:The most PRONOUNCED peak was pyridinic-N when pyridine was applied as the precursor, whereas the dominant peak shifted to amino-N when the precursor changed to acrylonitrile. Furthermore, graphitic-N increased 30–40% when ANTHRACENE was ADDED to the original PRECURSORS.

totally different EXPLANATION:PURE air has no pollutant and pollutant air has so MANY pollutant

r monotonic FUNCTIONS states: Suppose a function is CONTINUOUS on [a, b] and it is differentiable on (a, b). If the DERIVATIVE is LARGER than zero for all x in (a, b), then the function is increasing on [a, b]. If the derivative is less than zero for all x in (a, b), then the function is decreasing on [a, b]. A function is "increasing" when the y-value INCREASES as the x-value increases, like this: It is easy to see that y=f(x) tends to go up as it goes along.

it is a table where U can FOUND INFORMATION about MATTERS and there FORMS.

the ANSWER KINDLY MARK as BRAINLIEST

tion:When electrons are removed from an ATOM, that process requires energy to pull the electron AWAY from the nucleus.This CHANGE is CALLED as electron affinity.Hope it helps youFollow

it means that the PARTICLES of gasses are MOVE freely in AIR

Explanation: Lemon JUICE will become BROWNISH red in COLOUR.

The ATOM becomes negatively CHARGED ION DUE to excess of electrons as compared to positively charged PROTONS

ozone layer depletion is drastically affecting our environment.Explanation:The thinning of ozone layer causes ultraviolet rays to reach on EARTH which ultimately lead to GREEN house effect, distortion of WEATHER patterns, skin diseases and ALSO ADVERSELY  affecting crops and plants.