CHM 2210- USFSP PROBLEM SET #1 ) Which of the following alkanes would have the h

Question

CHM 2210- USFSP PROBLEM SET #1 ) Which of the following alkanes would have the highest boiling point? CH3 CH CH3- CH2-CH2-CH2-CH2- CH2-CH3 CH3-CH CH3 CH3 CH3- CH2-CH2-CH2- CH-CH3 CH H-CH2 CH- CE3 CEH3 CH3 CH3 2. What is the total number of sigma bonds found in the following compound? (a) 8 (b) 10 (c) 11 (d) 15 3. What is the total number of pi bonds found in the following compound? H-CEC-CH2-NO2 (a))1 (b) 2 4. Which representation for the Lewis structure of HNO, is correct? O: HO-N HO-NO2 (a 5. How many lone pairs of electrons will be present in the following molecule? (a) o b) 1 6. In the nitrate ion (NO), what is the charge on nitrogen? All electrons are shown. d) +2 a) no charge b)-1 c)+1

Explanation / Answer

1. Option a). n-heptane

Reason: always linear alkane will have higher boiling point compare to branched one due to greater Vander walls interaction

2. Answer is option c)11

Sigma bond are formed by head to head overlap between atomic orbital of similar energy

3. Answer option. b): 2

Pi bond are formed by side wise overlap of atomic orbitals of similar energy

4. Answer is option a).

Lewis structure is represtation of bonds between atoms of the molecule and denoting the lone pair available.

5. Answer is option d)

Reason : terminal nitrogen has two lone pair with negative charge and nitrogen attached methyl group has one lone pair, and central nitrogen does not have lone pair with positive charge

6. Answer is option c). +1

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