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Benzyl free radical is aromatic as per Huckel's rule it has 6π electreons present in p-orbital of carbon atoms

Ans :- The main chemicals in air pollution that create acidrainare sulfur dioxide (SO2) and nitrogen (NOx). Acidrain usually forms high in the clouds where sulfur dioxide and nitrogen oxides react with water, oxygen, and oxidants. this mixture forms a mild solution of sulfuric acidandnitric acid.

but this is a very short answer

a) should be right ,because when n=1 then 4×1=4 which is in a) Species

No. of moles=given mass / molar massmolar mass of NaOH= 23+16+1=40ggiven mass=0.38gno. of moles=0.38/40=9.5×10^-3molarity=no. of moles/ volume in lit.volume =50mlmolarity = 9.5×10^-3×10^3/50=1.9×10^-1

Concentration will increase by 3 times so the rate will also increase by 3 times as it follows 1 order kinetics

the relation between t½ and concentration is given by

t½ ∞ 1/[c]ⁿ-¹ .... where n is the order of the reaction

so, here t½ ∞ 1/[c]¹ in the question...so, n-1 = 1

=> n = 1+1 = 2..

option 3.

1)The products formed when zinc reacts with dilute nitric acid are zinc nitrate andhydrogengas; i.e. 3Zn + 7HNO3 ---> Zn(NO3)2 + NH2OH + 2H2O; 4Zn + 9HNO3 ----> 4Zn(NO3)2 + NH3 + 3H2O; ... Zinc reacts with dilute nitric acid to give zinc nitrate andhydrogengas

2)Fluorineis not reactive towards oxygen or nitrogen. If willreactwith moisture in the air to produce oxygen, see above.Fluorine reactswith chlorine at 225°C to form the interhalogen species ClF. ... Under more forcing conditions,excess fluorine reactswithbromineat 150°C to form the interhalogen species BrF5

thnx sir

option 1 is correct... because in 1 the electrons are in conjugation.. ( 2 double bond +1 lone pair.)

According to Rault’s law,

Po-­P/Po= w/m /w/m +W/M

Here, Po= 640 mm p = 600 mm

W = 2.175 g W = 39.0

m = ? M = 78

Substituting the various values in the above equation for Roult’slaw :

640 -600/640 = 2.175/m /2.175/m+39/78

1/16 = 2.175/2.175 + 0.5 m

m = 65.25

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instead of 500ml ,I used 1/2 litre for the value of V so don't get confused

let p is the pressure of CO as well as of Cl2.n so same partial pressure of COCl2 will be decreasedSo total pressure at equilibrium=1000-p+p+p=1000+p=1500Now calculate p .Writing, Kp=pCO*pCl2/pCOCl2=p*p/(1000-p)now we can get Kp

Sand mayer reaction

when benzene diazonium salt is reacting with salts like Cu2Cl2or Cu2Br2results in the replacement of diazo group (N2Cl) with Cl and Br respectively

D)optionc.benzene it is C6H6

my answer is also this but in answer key option showing me option c

thnks

can you explain how you can solve

option 4 is the correct answer .

as, there is no change in oxidation no. of any element.

1 mole of aluminium oxide (Al2O3) = 2*27 + 3 * 16

= 102 g

i.e., 102 g of Al2O3 = 6.022 * 10^23 molecules of Al2O3

Then, 0.051 g of Al2O3 contains =

= 3.011 * 10^20 molecules of Al2O3

The number of aluminium ions (Al3+) present in one molecule of aluminium oxide is 2.

Therefore, the number of aluminium ions (Al3+) present in 3.011 * 10^20 molecules (0.051 g ) of aluminium oxide (Al2O3) = 2 * 3.011 * 10^20

= 6.022 * 10^20

tysm for this ans

hydrolysis means breaking of water when Oh is added known as hydrolysis

In BF3 there are three bond pairs which are shared in between two atoms resulting in the triangular planar structure while in case of NF3 there is sharing of three bond pairs plus one lone pair. Because of the lone pair sharing the structure get distorted and resulting structure is pyramidal.

Hydrolysistakes place through the coordination with lone pair of electron of water molecule. But neither nitrogen, nor fluorine have vacant d-orbital for coordination. HenceNF3 does not undergo hydrolysis.

Hydrolysistakes place through the coordination with lone pair of electron of water molecule. But neither nitrogen, nor fluorine have vacant d-orbital for coordination. HenceNF3 does not undergo hydrolysis.

25 will make of third order of reflection

The [Ni(CN)4]2– ion, which has asquare-planar geometry, isdiamagnetic, whereas the [NiCl4]2– ion, which has atetrahedralgeometry, isparamagnetic.

Compressed natural gasis often confused with LNG (liquefied naturalgas). The main difference is that CNGis stored at ambient temperature and high pressure, while LNG is stored at low temperature and nearly ambient pressure. In their respective storage conditions, LNG is aliquidandCNGis a supercriticalfluid.

Oi

What is this

This is wrong

(a) 1953(b) CNG consists mainly of methane

Compressed natural gas (CNG) is a fuel which can be used in place of gasoline, diesel fuel and propane/LPG.

full form of CNG

A neutralization reaction is when an acid and a base react to form water and a salt and involves the combination of H+ions and OH- ions to generate water. The neutralization of a strong acid and strong base has a pH equal to 7.

Significance of three quantum numbers in predicting the position of an electron in an atom.

Principal quantum number (n): The principal quantum number explains about the size and energy of shells (or) orbitals.As “n” increases, the orbitals become larger and the electrons in those orbitals are farther from the nucleus.It take values 1, 2, 3, 4 for that the shells are represented by letters K, L, M, N.

Orbital quantum number (l) : It defines the shape of the orbital occupied by the electron and the orbital angular momentum of the electron is in motion. So it is also called as Angular momentum quantum number.l has integer values between 0 to n - 1 for these values the orbitals are designated by letters s, p, d, f,etc.l also governs the degree with which the electron is attached to nucleus. The larger the value of l, smaller is the bond with which it is maintained with the nucleus.

Magnetic orbital quantum number : The orientation of orbital with external magnetic field determines magnetic orbital quantum number.m; has integer values between -1 and l including zero. The number of values for m are 2l + 1, which give the number of orbitals per sub-shell.The maximum number of electrons in orbitals in the sub-shell is 2(2l + 1).

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Treatingalcoholswith HCl, HBr, or HI (which all fall under the catch-all term “HX” where X is ahalide) results in the formation ofalkyl halides. This occurs in a two step process: first, thealcoholis protonated to give its conjugate acid. Secondly, a substitution occur.

R-OH + H-X→R-O⁺H₂+X⁻→R-X

open page no. 286 in chemistry text book...... of ncert....

The Wurtz reaction is limited to the synthesis of symmetric alkanes. If two dissimilar alkyl halides are taken as reactants, then the product is a mixture of alkanes that is often difficult to separate by fractional distillation as the differences between the boiling points of the products is typically very low.If two different halides are taken with the aim of preparing an alkane with odd number of carbon atoms, a mixture of products is obtained instead of a single alkane which is difficult to separate. This is because in this case three reactions takes place and three different products are obtained. For example, a mixture of methyl bromide and ethyl bromide gives a mixture of ethane, propane and butane.

Ans :- Quantum numbersare important because they can be used to determine the electron configuration of an atom and the probable location of the atom's electrons.Quantum numbersare also used to determine other characteristics of atoms, such as ionization energy and the atomic radius.

Principal Quantum Number (n)—this designates thesizeof the orbital, also called theshell. The larger the value forn, the greater the average distance of an electron in the orbital from the nucleus and therefore the larger the orbital. (I could always remember this trend by relating it back to Coulomb’s Law of Attractive Forces.) From the equation that defines the line spectrum of Hydrogen, we can also know that the value fornrepresentsenergy levels.

Angular Momentum Quantum Number (l)—this describes theshapeof the orbital, but again, you can relate it back to the periodic table. The values oflare integers that depend on the value of the principal quantum number,n. For any given value ofn, the possible range of values forlgo from 0 ton- 1. Ifn= 1, there’s only one possible value ofl; that is, 0 (n - 1 where n = 1). Ifn= 2, there’s two values forl:0 and 1. Ifn= 3,lhas three values: 0, 1, and 2.

Magnetic Quantum Number (mlml)—this describes the orientation of the orbital in space, or the direction along the axes in which it faces. Within a subshell, the value of this depends on the value ofl. For a certain value ofl, there are (2l+ 1) integral values, or-l, … 0, … +l.

Electron Spin Quantum Number (msms)—where three quantum numbers are sufficient to describe an atomic orbital, an additional number becomes necessary to describe an electron that occupies the orbital. And for anygeneralorbital, two electrons occupy it.

Halogen alkanes form permanent dipole - permanent dipole bonds, which is a type of intermolecular bond. This bond is caused by the permanent dipoles present on individual halogen alkane molecules.

Water forms hydrogen bonds, which is another type of intermolecular bond also found in ammonia and amino acids. Hydrogen bonds work when highly negative atoms exchange hydrogen ions with one another. Hydrogen bonds are much stronger than PD-PD attractions. Halogen alkanes cannot break through hydrogen bonds between water molecules, therefore water and halogen alkanes are not miscible.

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A polar molecule is a chemical species in which the distribution of electrons between the covalently bonded atoms is not even. Polarity is a description of how different the electrical poles of a molecule are. If they are highly different, it can be said that the species is a highly polar molecule. Some chemical species, such as chains of carbon molecules, share electrons equally and are said to be nonpolar molecules.

Typically, the designation of whether a molecule is polar or nonpolar comes from the sum of all of its bonds considered together. Each atom has a certain electronegativity. When bonded to another atom, the atom with the higher electronegativity will tend to attract more electrons. If the difference is not great, a nonpolar bond is formed. If the difference is considerable, a polar bond will form and one atom will attract more electrons. In the more extreme cases, the atom with the greater electronegativity will strip the electrons from the first atom and not share them at all. This creates an ionic bond which is simply an attraction between the two species of atom which are positive and negative. Because they do not share electrons, no physical bond connects these species, and they are considered ions in a matrix and not polar molecules.

In chemistry, polarity is a separation of electric charge leading to a molecule or its chemical groups having an electric dipole moment, with a negatively charged end and a positively charged end. Polar molecules must contain polar bonds due to a difference in electronegativity between the bonded atoms.

Polar Molecular Solids: In thesesolids, the geometry is such that one side has a negative charge, and the other has a positive charge. The force holding them together is a dipole – dipole force of attraction. Their melting and boiling points are higher than non-polar molecular solidsbut still relatively low.

Examples of polar molecules include:

Water - H2O

Ammonia - NH3

Sulfur dioxide - SO2

Hydrogen sulfide - H2S

Ethanol- C2H6O

d 4.3 *10 power -7 meter is answer

4.3×10^-7 is the correct answer of the given question