Explore topic-wise InterviewSolutions in .

Hess's Law of Constant Heat Summation states that regardless of the multiple stages or intermediate steps of a reaction, the total enthalpy change for the reaction is the sum of all changes.

The enthalpy of a chemical process is independent of the path taken from the initial to the final state.

option (b)

b) Rhizobium is correct option

Explaination:Definitionofnitrogen fixation. : the conversion of atmosphericnitrogeninto a combined form (such as ammonia) through chemical and especiallybiologicalaction (such as that of soil rhizobia)

thanks😀😂😁

t½ = 3 days = ln2/k

=> k = ln2/3

now when t = 12 days , amount left = 3g

so, 12 = (1/k)*ln[A°/3]=> 12 = (3/ln2)*ln(A/3)=> 4 = log2[A/3]=> A/3 = 2⁴ = 16gm=> A = 3*16 = 48g

thankyou very much bhai

Nitrogen fixation is a process by which nitrogen in the Earth's atmosphere is converted into ammonia or related nitrogenous compounds. Atmospheric nitrogen, which is molecular dinitrogen, is relatively nonreactive and is metabolically useless to all but a few microorganisms

thanks a lot

6 and 8 no are tertiaryhence 2 tertiary alkyl

Moles of urea = molecules/avogadro no = 6.02X10^20 / 6.022 X 10^23 = 10^-3 molesSo it will have 10^-2 mole in 1 litre of solutionbecause Molarity/concentration = mole / litre = 10^-3/1L = 10^-2M =0.01Mhence,opction(C) is correct

decreasing order of pKa means, the less acidic will come first. ( increasing order of acidic strength)

Strong cids here are those , which can donate H+ easily and form stable conjugate base.. ( like resonating conjugate bases)

so, order of pka is

(ii)>(iii) > (iv) > (i)

Mole fractionis a unit of concentration,definedto be equal to the number ofmolesof a component divided by the total number ofmolesof a solution. Because it is a ratio,mole fractionis a unitless expression

Please like the solution 👍 ✔️

Like if you find it useful

this is just to give you idea pls mark as best

you post questions in which you have doubt, and we help you resolve your queries as soon as possible.

question ka answer D hai

(A) P is right answer

(D) P4 because phosphorus is tetravalent

(A)is the correct answer

Hydrogenation is the process of addition of hydrogen. Unsaturated hydrocarbons are added with hydrogen in the presence of palladium and nickel catalysts to give saturated hydrocarbons. This reaction is applied in the hydrogenation of vegetables oils, which contain long chains of unsaturated carbons.

1.00M means that1 mole of soluteis dissolved in1L of solution

Molar mass of water=18.

Therefore 1kg of water =1000/18mol = 55.6mol

Therefore mole fraction of the solute is1/(55.56+1)=1/(55.56+1)=0.0177

Hydrogenation– meaning, to treat withhydrogen– is achemical reactionbetween molecular hydrogen (H2) and another compound or element, usually in the presence of acatalystsuch asnickel,palladiumorplatinum. The process is commonly employed toreduceorsaturateorganic compounds. Hydrogenation typically constitutes the addition of pairs ofhydrogenatomsto a molecule, often analkene.Catalystsare required for the reaction to be usable; non-catalytic hydrogenation takes place only at very high temperatures. Hydrogenation reducesdoubleandtriplebonds inhydrocarbons.

Hydrogenationis a reduction reaction which results in an addition of hydrogen (usually as H2). If an organic compound ishydrogenated, it becomes more "saturated" with hydrogen atoms. The process typically requires the use of a catalyst, sincehydrogenationonly occurs spontaneously at high temperatures

Hydrogenation–meaning, to treat with hydrogen – is a chemical reaction between molecular hydrogen (H2) and another compound or element, usually in the presence of a catalyst such as nickel, palladium or platinum.

Hydrogenation–meaning, to treat with hydrogen – is a chemical reaction between molecular hydrogen (H2) and another compound or element, usually in the presence of a catalyst such as nickel, palladium or platinum.

Hydrogenation is a chemical reaction that adds hydrogen to a molecule.

Hydrogenation is not thermodynamically favorable at ordinary temperatures, so a catalyst is needed. Usually this catalyst is a metal.

Examples of hydrogenated products include margarine, mineral turpentine, and aniline

Hydrogenation is a chemical reaction that adds hydrogen to a molecule.

Hydrogenation is not thermodynamically favorable at ordinary temperatures, so a catalyst is needed. Usually this catalyst is a metal.

Examples of hydrogenated products include margarine, mineral turpentine, and aniline

Hydrogenationis a reduction reaction which results in an addition of hydrogen (usually as H2). If an organic compound ishydrogenated, it becomes more "saturated" with hydrogen atoms. The process typically requires the use of a catalyst, sincehydrogenationonly occurs spontaneously at high temperatures.

Hydrogenationis a reduction reaction which results in an addition of hydrogen (usually as H2). If an organic compound ishydrogenated, it becomes more "saturated" with hydrogen atoms. The process typically requires the use of a catalyst, sincehydrogenationonly occurs spontaneously at high temperatures.

Hydrogenation – meaning, to treat with hydrogen – is a chemical reaction between molecular hydrogen and another compound or element, usually in the presence of a catalyst such as nickel, palladium or platinum. The process is commonly employed to reduce or saturate organic compounds.

It is used as a catalyst in addition of hydrogen.

Hydrogenation refers to the treatment of substances with molecular hydrogen (H2), adding pairs of hydrogen atoms to compounds (generally unsaturated compounds). These usually require a catalyst for the reaction to occur under normal conditions of temperature and pressure. Most hydrogenation reactions use gaseous hydrogen as the hydrogen source, but alternative sources have been developed. The reverse of hydrogenation, where hydrogen is removed from the compounds, is known as dehydrogenation. Hydrogenation differs from protonation or hydride addition because in hydrogenation the products have the same charge as the reactants.

Hydrogenation – meaning, to treat with hydrogen – is a chemical reaction between molecular hydrogen (H2) and another compound or element, usually in the presence of a catalyst such as nickel, palladium or platinum. ... Hydrogenation reduces double and triple bonds in hydrocarbons.

Main technologies or sub-processes:Various transition metal catalysts, high-pressure ...

Product(s):Saturated hydrocarbons and derivatives

Industrial sector(s):Food industry,petrochemical industry, pharmaceutical industry, ...

Hydrogenation – meaning, to treat with hydrogen – is a chemical reaction between molecular hydrogen (H2) and another compound or element, usually in the presence of a catalyst such as nickel, palladium or platinum. ... Hydrogenation reduces double and triple bonds in hydrocarbons.

Main technologies or sub-processes:Various transition metal catalysts, high-pressure ...

Product(s):Saturated hydrocarbons and derivatives

Industrial sector(s):Food industry,petrochemical industry, pharmaceutical industry, ...

Hydrogenationis a reduction reaction which results in an addition of hydrogen (usually as H2). If an organic compound ishydrogenated, it becomes more "saturated" with hydrogen atoms. The process typically requires the use of a catalyst, sincehydrogenationonly occurs spontaneously at high temperatures.Jul 3, 2019

Hydrogenation is the process where hydrogen atoms bind to the double bond of a compound, facilitating its conversion to a single bond, in the presence of a catalyst. Hydrogenation is commonly used during the manufacturing of food products where unsaturated fats and oil are converted to saturated fats and oils.

addition of hydrogen molecule to the given respected alkene

thanks

Balanced equation2HNO3 + Ca(OH)2 -----> Ca(NO3)2 + 2H2O

Scientist Pauling introduced the revolutionary concept of hybridization in the year 1931. He described it as the redistribution of the energy of orbitals of individual atoms to give new orbitals of equivalent energy and named the process as hybridization. In this process, the new orbitals come into existence and named as the hybrid orbitals.

You can find the hybridization of an atom by finding its steric number: The steric number = the number of atoms bonded to the atom + the number of lone pairs the atom has. If the steric number is 4, the atom is s p 3 hybridized. If the steric number is 3, the atom is s p 2 hybridized.

You can find the hybridization of an atom by finding its steric number: The steric number = the number of atoms bonded to the atom + the number of lone pairs the atom has. If the steric number is 4, the atom is s p 3 hybridized. If the steric number is 3, the atom is s p 2 hybridized.

The phenomenon of mixing up of atomic orbitals of similar energy and formation of equivalent number of entirely new orbitals of identical shape and energy is known as hybridisation and new orbitals so formed are called hybrid orbitals.

CH4 (methane)tetrahedral sp3 hybridised

RCH2X +2Na+RCH2X------------dry ether ------->2NaCl+RCH2-RCH2

TheWurtz reaction, named after Charles AdolpheWurtz, is a couplingreactionin organic chemistry, organometallic chemistry and recently inorganic main group polymers, whereby two alkyl halides arereactedwith sodium metal in dry ether solution to form a higher alkane: 2 R–X + 2 Na → R–R + 2 Na+X.

The Wurtz reaction is a very useful reaction in the fields of organic chemistry and organometallic chemistry for the formation of alkanes. In this reaction, two different alkyl halides are coupled to yield a longeralkanechain with the help of sodium and dry ether solution.This reaction is named after the French chemist Charles Adolphe Wurtz, who also discovered the aldol reaction. Apart from sodium, metals like silver, indium, activated copper, zinc, and iron can also be used in the Wurtz reaction in order to obtain alkanes.Wurtz Reaction Equation

The general form of the Wurtz reaction equation can be written as follows:2R-X + 2Na → R-R + 2Na+X–It can be observed from this equation that the two R groups are joined, yielding an alkane with a longer chain along with NaX, where X is a Halogen.

Number of molecules available in oxalic acid is equal to 252 divided by 126 which come to 2.

Number of molecules of water present is equal to 2 x 6.02 x 10 ^ 23

Therefore, number of molecules of water of hydration present in 252mg oxalic acid is 12.04 x 10^ 23.

Both are electrophilic addition reactions, across a double bond, and have very similar mechanisms.

Hydrogneation reactions, need the addition of hydrogen gas, a nickle catalyst and a 60 degree temperature.

hydration reactions need the addition of water 300 degrees and a phosphoric acid catalyst.

Nasodium is electro positive

having a tendency to release electrons

(of an element) tending to lose electrons and form positive ions in chemical reactions.

Thnx to both

Can u answer my previous questions.

it reacts with water so not prepared in water

Phenyl hydrazine reacts with the carbonyl group of the sugar, resulting in the formation of phenylhydrazone and the osazone.

3Fe + 4H2O = Fe3O4 + 4H2

(a) 2(HNO3) + Ca(OH)2 → Ca(NO3)2 + 2(H2O)

Aluminum starch octenylsuccinate

* A complex carbohydrate made by plants.

Acts as an anti-caking agent, a viscosity (resistance to flow) increasing agent, and an absorbent. Used in products like lotion, powder, and makeup, mainly for aesthetic purposes.

Dimethiocone cross polymer

Crosspolymer are flexible silicon polymers consisting of dimethicone copolymers that are linked together (crosslinked). In cosmetics and personal care products, these ingredients are used in deodorants, makeup, and skin and hair care products.

14. An atom is electrically neutral.15. The central part of an atom with positive charge is known as nucleus.

option A

the structure is

H-O-C-O-H || O

that is sp2 hybridised

The reaction that you have mentioned is incorrect, the correct reaction is:

Pb(NO3)2———— PbO + NO2 +O2

Now, the balance reaction is:

2Pb(NO3)2———— 2PbO + 4NO2 +O2

Check the coefficient on Pb, N2 and O2 on LHS and RHS while balancing, they should be same.

optiond) sp^3TheICl2+IClX2X+ion can thus be explained by assuming one double-filled s- and one double filled p-orbital plus two half-filled p-orbitals on iodine. Each of the two half-filled orbitals then create a normalσσ-bonds to a corresponding p-orbital of one of the chlorine atoms, predicting a bond angle of 90° (closer to 98° than if we assumed sp³-hybridisation which would suggest 109.5°).

AB3

A is a central atom and B are the atoms bonded to the central atom.A species of this type have three bonding electron pair and no lone pair (bp=3,lp=0).These bonding electron pair occupy their position as far as possible so that the electrostatuc repulsion between them is minimum.This is most probable if the bond angle between them is 120•.Thus such species have trigonal planar or equvalent truangle,geometry.

Examples

BCl3,BF3,BH3,So3 ,etc.

option B is the answer

MW of methane = 16 g/mole So, no of moles of methane in 1.6 g = 1.6 /16 g/mole = 0.1Since, in 1 mole methane there are 6.022 x 1023 molecules of methane, so, in 0.1 mole there will be 0.1 x 6.022 x 1023 molecules of methane In 1 methane molecule there are 10 electrons (6 + 4) total electrons in 0.1 mole or 1.6 g = 10 x 0.1 x 6.022 x 1023 = 6.022 x 1023