c hydrogen bonding bonding 2. Which intermolecular force is the strongest? a. di

Question

c hydrogen bonding bonding 2. Which intermolecular force is the strongest? a. dipole-dipole interactions b. London dispersion forces c. hydrogen bonding d. ionic bonding e. polar covalent bonds 3. Which of the following should have the highest boling point? a Na 0 c. NH 4. the resistance of a squsd to an increase in ns surtace aroa s cased a capilary action b surface tension d viscosity 5. Which of the following statements is true about the vapor pressures ammonia (NHs)7 a. The vapor pressure of ammonia is greater than the vapor pressure of methane (CHa) and of methane because ammonia as b. The vapor pressure of ammonia is less than the v and methane is polar C. The vapor pressure of methane is greater than the vapor pressure hydrogen bonding than ammonia. d. The vapor pressure of ammonia is equal to the vapor pressure of mothane. e. None of these statements is true vapor pressure of methane because ammonia is no of methane because methane ha 6. You are given the folowing boling-point daa water, H:0 methanol, CH OH ethanol. CHOH OH diethyl ether, CHiOH-O-CH CH ethylene glyool, HO-CH-CH-OH 100 C 6496" C 78.5" 34.5 C 198 c Which one of these liquids would you expect to have the highest vapor pressure at room temperatune? a. water, HO b. methanol, CH:OM C, ethanol. CHCH OH e. ethylene glyool, DATE-3 OUT:

Explanation / Answer

2) The intermolecular forces are the forces acting between the molecules. Polar covalent bonds are strong but they are not intermolecular forces. Rest of all are intermolecular forces: ionic bonding > hydrogen bonding > dipole-dipole interaction > London dispersion forces.
Thus the answer is option d. ionic bonding.
3) Sodium oxide is an alkali metal oxide. Its boiling point is 1950oC. Thus, the highest boiling point is Na2O. Thus answer is option a) Na2O.
4) The resistance of a liquid to an increase in its surface area is called Surface Tension.
5) Vapor pressure of methane is greater than that of ammonia because ammonia has hydrogen bonding, whereas methane does not. I am not sure about the option C here as the last part of the sentence is not visible. If it states 'methane has less hydrogen bonding than ammonia' then we can say the answer is option C. But if it does not say, then the answer is option e.
6) HIgher the vapor pressure, lower the normal boiling point of substance. So from the given liquids lowest boiling point liquid will have the highest vapor pressure. Hence, the answer is an option: d. Diethyl ether.

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