Q1. What is the general formula for secondary amines? (2023)
Solution:
The general formula for secondary amines is R2NH, where R represents an alkyl group.
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Q2. What is the boiling point trend among primary, secondary, and tertiary amines?
Solution:
Primary amines have higher boiling points than secondary and tertiary amines due to stronger hydrogen bonding.
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Q3. What is the main product when an amine reacts with an acyl chloride?
Solution:
The reaction of an amine with an acyl chloride produces an amide.
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Q4. What is the product of the reaction between an amine and an acid?
Solution:
The reaction between an amine and an acid produces a salt, as the amine acts as a base and accepts a proton from the acid.
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Q5. Which of the following is a primary amine? (2022) 2022
Solution:
Ethylamine (C2H5NH2) is a primary amine as it has one alkyl group attached to the nitrogen atom.
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Q6. What is the product of the reaction between ammonia and ethyl bromide?
Solution:
The reaction produces Ethylamine as ammonia acts as a nucleophile and replaces the bromine atom.
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Q7. What is the pKb value of a weak base like methylamine?
Solution:
Methylamine is a weak base, so its pKb value is less than 7.
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Q8. What is the pKb value of a weak base like aniline? (2020)
Solution:
Aniline has a pKb value around 9, indicating it is a weak base.
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Q9. Which of the following amines is the most basic? (2023) 2023
Solution:
Dimethylamine is the most basic due to the electron-donating effect of the two methyl groups, which increases the availability of the lone pair on nitrogen.
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Q10. What is the general formula for secondary amines? (2021) 2021
Solution:
The general formula for secondary amines is R2NH, where R represents an alkyl or aryl group.
