1.Two hydrogen atoms can combine to form H2 but two He atoms cannot form He2 —...

1.Two hydrogen atoms can combine to form H2 but two He atoms cannot form He2 — Justify from MO viewpoint.

2.Ethyl benzene is treated with (i) Br2 and FeBr3 and (ii) Br2 and light or heat separately. Do you think the products will be same? Justify your answer.

3.The double bond in cyclohexene can be oxidized by potassium permanganate (KMNO4), whereas the double bonds in benzene do not undergo this oxidation reaction — Justify.

Expert Solution

1. When two hydrogen atoms with 2 e- each combine to form H2, bond order = 1/2(2 - 0) = 1

So 1 bond exists between two H atoms to form H2 molecule

In case of He with 2 e-'s each, bond order = 1/2(2-2) = 0

So no bond exists between two He atoms and thus He2 is not formed.

2. When ethylbenzene is treated with,

(i) Br2 in FeBr3, an electrophilic aromatic bromination occurs on benzene ring to form para-bromotoluene product.

(ii) Br2 and light or heat separately, a free radical bromination occurs at the CH2 position of ethyl chain to give 1-bromoethylbenzene.

3. In benzene the double bonds are stabilized by aromaticity character which provides an extra stabilization to the system as opposed to If addition product is formed. The bond lengths are in between single and double bonds. Whereas, in cyclohexene isolated double bond has more pi-character and can be used in addition reaction to form more stable less strained ring structure.

queen_honey_blossom answered 2 years ago

hydrogen bonds... a) are the strongest but can be weak b) form between two hydrogen atoms...

hydrogen bonds... a) are the strongest but can be weak b) form between two hydrogen atoms c) involve the transfering of electrons d) strongest bonds due to their length e) only can be able to form between o2 atoms and H atoms within a molecule f) none of the above g) all of the above I) need more information

The sun is mostly composed of hydrogen-1 atoms. When two of these hydrogen-1 atoms collide, it...

The sun is mostly composed of hydrogen-1 atoms. When two of these hydrogen-1 atoms collide, it produces no nuclear reaction. Why? And How does the collision between two hydrogen-1 atoms in the sun become a nuclear fusion reaction?

At 2730 °C, hydrogen molecules dissociate into hydrogen atoms according to the equation H2 (g) →...

At 2730 °C, hydrogen molecules dissociate into hydrogen atoms according to the equation H2 (g) → 2 H(g). 10.0 g H2 (g) is placed into a 100.0-L container, sealed and heated to 2730 °C so that the hydrogen molecules begin to dissociate. What is the partial pressure of hydrogen molecules and the total pressure within the container once 25% of H2 has dissociated? The answers are PH2 = 9.2 atm, Ptotal = 15 atm, but how I get it?

(a) Just like the familiar liquid solutions, two metal ions or atoms combine to form solid...

(a) Just like the familiar liquid solutions, two metal ions or atoms combine to form solid solution. What are substitutional solid solutions and interstitial solid solutions? Explain with examples and sketches. (b) How well the solid atoms combine to form solid solutions depends on how many of the Hume-Rothery rules have been violated or not violated. Describe Hume-Rothery rules?

Which spectral lines in the emission spectrum of hydrogen atoms can be observed if the atoms...

Which spectral lines in the emission spectrum of hydrogen atoms can be observed if the atoms are excited by electrons with kinetic energy E_kin = 13.3eV?

Consider two identical boxes filled with hydrogen atoms. The atoms in Box A are illuminated by...

Consider two identical boxes filled with hydrogen atoms. The atoms in Box A are illuminated by a beam of ultraviolet light, while the atoms in Box B collide with a beam of electrons. The light has a wavelength of 97.3 nm in vacuum. Each electron in the electron beam has the same energy as each photon in the beam of light. For electrons, the potential energy levels are the difference between the excited energy state that the atom is knocked...

When two hydrogen atoms approach each other to form a chemical bond, different interactions occur between...

When two hydrogen atoms approach each other to form a chemical bond, different interactions occur between the atoms. Identify the correct statements with respect to the interactions involved in the formation of chemical bond. Check all that apply. When two atoms of H approach each other, each electron repels the other nucleus. When two atoms of H approach each other, each electron is attracted by the other nucleus. When two atoms of H are infinitely far apart, they show attractive...

Problem 3. Consider two identical boxes filled with hydrogen atoms. The atoms in Box A are...

Problem 3. Consider two identical boxes filled with hydrogen atoms. The atoms in Box A are illuminated by a beam of ultraviolet light, while the atoms in Box B collide with a beam of electrons. The light has a wavelength of 97.3 nm in vacuum. Each electron in the electron beam has the same energy as each photon in the beam of light. a) Calculate the energy of the electron beam b) How many spectral absorption lines do you expect...

Hydrogen gas and oxygen gas release 482.6 kJ of heat when they combine to form steam....

Hydrogen gas and oxygen gas release 482.6 kJ of heat when they combine to form steam. Is this reaction endothermic or exothermic? In which direction does heat transfer (between system and the surroundings) for this reaction? Is deltaH for this reaction positive or negative?

In the ammonia (NH3) molecule of the figure, three hydrogen (H) atoms form an equilateral triangle,...

In the ammonia (NH3) molecule of the figure, three hydrogen (H) atoms form an equilateral triangle, with the center of the triangle at distance d = 9.40 × 10x^–11 m from each hydrogen atom. The nitrogen (N) atom is at the apex of a pyramid, with the three hydrogen atoms forming the base. The nitrogen-to-hydrogen atomic mass ratio is 13.9, and the nitrogen-to-hydrogen distance is L = 10.14 × 1x^0–11 m. What are the (a) x and (b) y coordinates...

Question