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Pyridine is less basic than triethylamin...

Pyridine is less basic than triethylamine because

A

Pyridine has aromatic character

B

Nitrogen in pyridine is `sp^(2)` hybridised

C

Pyridine is a cyclic system

D

In pyridine, lone pair of nitrogen is delocalised.

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The correct Answer is:
B
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The lone pair of amines makes them basic. They react with acids to form acid-base salts. Amines are more basic than alcohols, ethers and water. When an amine is dissolved in water, an equilibrium is established , where water acts as an acid and transfer a proton to the amine. The basic strength of an amine can be measured by basicity constant K_(b) . Arylamines are less basic than alkylamines because the lone pair of nitrogen is delocalised with the aromatic ring and are less available for donation. Substituted arylamines can be either more basic or less basic than aniline , depending on the substituted . ERG substituents, such as -CH_(3), -NH_(2) and -OCH_(3) increases the basicity and EWG substituents , such as -Cl, -NO_(2) and -CN decreases basicity. While sp^(2)- hybridized nitrogen atom in pyridine is less basic then the sp^(3) -hybridized nitrogen in an alkylamine. The most basic carbanion is :

The lone pair of amines makes them basic. They react with acids to form acid-base salts. Amines are more basic than alcohols, ethers and water. When an amine is dissolved in water, an equilibrium is established , where water acts as an acid and transfer a proton to the amine. The basic strength of an amine can be measured by basicity constant K_(b) . Arylamines are less basic than alkylamines because the lone pair of nitrogen is delocalised with the aromatic ring and are less available for donation. Substituted arylamines can be either more basic or less basic than aniline , depending on the substituted . ERG substituents, such as -CH_(3), -NH_(2) and -OCH_(3) increases the basicity and EWG substituents , such as -Cl, -NO_(2) and -CN decreases basicity. While sp^(2)- hybridized nitrogen atom in pyridine is less basic then the sp^(3) -hybridized nitrogen in an alkylamine. pK_(b) order of the following compound is : (I) NH_(2)OH" "(II) NH_(2)NH_(2)" "(III) NH_(3)" "(IV)H_(2)O

Trimethylamine is less basic than dimethylamine.

PH_3 is less basic than NH_3 .

Assertion: (C_(2)H_(5))_(3)N is less basic than trimethylamine (CH_(3))_(3)N Reason: Due to hyperconjugation of C_(2)H_(5) is less than methyl.

Phenol is less acidic than

Phenol is less acidic than

Phenol is less acidic than

Phenol is less acidic than

A: Phthalimide is less basic than acetamide. R: Acetamide is more basic than ethyl amine.

RESONANCE ENGLISH-GENERAL ORGANIC CHEMISTRY II-(APSP) Part-I:Practice Test-1
  1. Which is less basic than benzyl carbanion ?

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  2. The decreasing order of acidic strength among trichloroacetic acid (I)...

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  3. Consider the following carbanions (i) CH(3)- overset(Ө)CH(2)" "(ii...

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  4. The order of stability of the following carbocations:

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  5. The most stable carbocation is

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  6. Pyridine is less basic than triethylamine because

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  7. Which is the following phenol has lowest pK(a) ?

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  8. Which is most basic among the followings ?

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  9. Assertion:The pK(a) of acetic acid is lower than that of phenol. Reaso...

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  10. The order of stability of the following tautomeric compounds is : un...

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  11. Observe the following feasible reaction: Q. Identify the feasible...

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  12. In which of following carbocation rearragement take place with change ...

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  13. Observer the following reaction sequence. Which is correct acidic...

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  14. Most stable carbocation among the following is

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  15. Select the most basic compound.

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  16. Which of the following compounds will have highest enolic content?

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  17. The hydride ion H^(-) is stronger base than its hydroxide ion OH^(-) W...

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  18. Give the stability order of following radicals :

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  19. The most stable carbanion among the following is

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  20. Which of the following is the most stabilized carbocation ?

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