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Standard XII

Chemistry

Formal Charge

In which of t...

Question

In which of the following compounds the carbon marked asterisk is expected to have greatest positive charge?

* C H_{3} - C H_{2} - C l

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* C H_{3} - C H_{2} M g C l

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* C H_{3} - C H_{2} - B r

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* C H_{3} - C H_{2} - C H_{3}

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Solution

The correct option is A $* C H_{3} - C H_{2} - C l$
As $C l$ is most electronegative element among the $C l, M g, B r$ and $C$ thus, it has greater -I effect and the asterisk marked carbon in $C H_{3} - C H_{2} - C l$ is expected to have greater positive charge.

Option A is correct.

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Similar questions

Q. Identify the type of the following reaction of carbon compounds.
a. CH₃ -CH₂ -CH₂-OH → CH₃ -CH₂ -COOH
b. CH₃ -CH₂ -CH₃ → 3CO₂ + 4H₂O
c. CH₃ -CH = CH -CH₃ + Br₂ → CH₃ -CHBr - CHBr -CH₃
d. CH₃ -CH₃ + Cl₂→ CH₃ -CH₂ -Cl + HCl
e. CH₃-CH₂ -CH₂ -CH₂ -OH → CH₃ -CH₂ -CH=CH₂ + H₂O
f. CH₃-CH₂ -COOH + NaOH → CH₃ -CH₂ -COO - Na⁺ + H₂O
g. CH₃ -COOH + CH₃ -OH → CH₃ -COO- CH₃ + H₂O

Q. Select the member of each pair that shows faster rate of

S_{N} 2

reaction with

K I

in acetone.

(a)

C H_{3} - C H_{2} - C H_{2} - C H_{2} - C l a n d C H_{3} - C H ∣ C H_{3} - C H_{2} - C l

(I) (I I)

(b)

C H_{3} - C H_{2} - C H_{2} - C l a n d C H_{3} - C H_{2} - C H_{2} - B r

(I) (I I)

(c)

C H_{3} - C H ∣ C H_{3} - C H_{2} - C H_{2} - C l a n d C H_{3} - C H_{3} ∣ C ∣ C H_{3} - C H_{2} C l

(I) (I I)

(d)

C H_{3} - C H_{2} - C H_{2} - B r ∣ C H - C H_{3} a n d C H_{3} - C H_{3} ∣ C H - C H_{2} - B r ∣ C H - C H_{3}

(I) (I I)

Name the functional groups present in the following compounds: [5 MARKS]

1. ${CH}_{3} - {CH}_{2} - {CH}_{2} - OH$
2. ${CH}_{3} - {CH}_{2} - {CH}_{2} - COOH$
3. ${CH}_{3} - {CH}_{2} - CHO$
4. ${CH}_{3} - CO - {CH}_{2} - {CH}_{3}$
5. ${CH}_{3} - {CH}_{2} - CO-OH$

Q. Which of the following is position isomer of

C H_{3} - C H_{2} - O | | C - C H_{2} - C H_{3}

Q. What is the correct relationship between the following compound?

C H_{3} - C H_{2} - C | C H_{3} H - C H_{2} - C H_{3}

C H_{3} - C H_{2} - C H_{2} - C H_{2} - C | C H_{3} H_{2}

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In which of the following compounds the carbon marked asterisk is expected to have greatest positive charge?

The correct option is A ∗CH3−CH2−ClAs Cl is most electronegative element among the Cl,Mg,Br and C thus, it has greater -I effect and the asterisk marked carbon in CH3−CH2−Cl is expected to have greater positive charge.Option A is correct.

The correct option is A $* C H_{3} - C H_{2} - C l$
As $C l$ is most electronegative element among the $C l, M g, B r$ and $C$ thus, it has greater -I effect and the asterisk marked carbon in $C H_{3} - C H_{2} - C l$ is expected to have greater positive charge.

Option A is correct.