Which of the following molecules is polar- Select one- a- C2H6 b- CO2.docx

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Which of the following molecules is polar? Select one: a. C2H6 b. CO2 c. CH3OH d. CH4 e. All of the above are polar In a hydrogen bond, what is required from the donor, acceptor, and the hydrogen atom? Select one: a. That they will all be on a straight line for maximal bond strength b. That the donor and acceptor be partially positive, the hydrogen partially negative c. That the distance between the donor and acceptor is ~ 0.18 nanometer d. All of the above are correct Which of the following is NOT true? Select one: a. Water can dissolve any polar compound b. Water can dissolve any ion or any polar compound c. Water can dissolve any polar and most non-polar compounds d. Water can dissolve many charged compounds The aqueous solution with the highest pH is: Select one: a. 0.1 M HCl. b. 0.1 M acetic acid (pKa = 4.86). c. 0.1 M formic acid (pKa = 3.75). d. 0.1 M NaOH. For any weak acid is titered with half molar equivalents of a strong base, the resulting pH would be- Select one: a. 0.5 b. Ka c. -log Ka d. -log [A-] e. Can\'t tell from the information provided Which of the following correctly describes the order of bond strengths (from stronger to weaker)? Select one: a. Dispersion > ionic > hydrogen > covalent b. Ionic > covalent > dispersion > hydrogen c. Covalent > ionic > hydrogen > dispersion d. Covalent > ionic > dispersion > hydrogen e. Covalent > hydrogen > ionic > dispersion Solution Solved the first problem as per Chegg guidelines, post multiple question to get the remaining answers Which of the following molecules is polar? The correct answer is Option C (CH3OH) Reason: The dipole moment created by electronegativity difference of O-H bond doesn\'t get cancelled leading it to be a polar bond .

Formation

c. 0.1 M formic acid (pKa = 3.75).
d. 0.1 M NaOH.
For any weak acid is titered with half molar equivalents of a strong base, the resulting pH would
be-
Select one:
a. 0.5
b. Ka
c. -log Ka
d. -log [A-]
e. Can't tell from the information provided
Which of the following correctly describes the order of bond strengths (from stronger to
weaker)?
Select one:
a. Dispersion > ionic > hydrogen > covalent
b. Ionic > covalent > dispersion > hydrogen
c. Covalent > ionic > hydrogen > dispersion
d. Covalent > ionic > dispersion > hydrogen
e. Covalent > hydrogen > ionic > dispersion
Solution

Solved the first problem as per Chegg guidelines, post multiple question to get the remaining
answers
Which of the following molecules is polar?
The correct answer is Option C (CH3OH)
Reason: The dipole moment created by electronegativity difference of O-H bond doesn't
get cancelled leading it to be a polar bond

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