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Question 1
An ester is the product of a carboxylic acid reacting with an alcohol, with elimination of water. What is the general formula of a saturated, unbranched, monocarboxylic ester (no rings, one ester group)?
Correct Answer:
CnH2nO2 (n >= 2)
Question 2
What is the IUPAC-style name commonly used in the Vietnamese Grade 12 programme for the ester CH3COOC2H5?
Correct Answer:
ethyl acetate (ethyl ethanoate)
Question 3
When an ester is hydrolysed in a sodium hydroxide solution (saponification), the products are a salt of the carboxylic acid and an alcohol. What are the products of CH3COOC2H5 + NaOH?
Correct Answer:
CH3COONa and C2H5OH
Question 4
Triglycerides (fats and oils) are triesters of glycerol with long-chain fatty acids. Which statement about a fat such as tristearin (glyceryl tristearate) is correct?
Correct Answer:
It is a saturated fat that is usually solid at room temperature
Question 5
Soap is made by boiling a fat with sodium hydroxide. The cleaning action comes from soap molecules having two ends. Which description is correct?
Correct Answer:
A long nonpolar hydrocarbon tail (lipophilic) and a polar -COO-Na+ head (hydrophilic)
Question 1
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Prepare with the THPT Chemistry Practice Questions - Ky thi tot nghiep THPT - Mon Hoa hoc (Vietnam High School Graduation Chemistry Exam) Exam practice quiz. This question bank includes 100 questions covering acid, metals, solution, reaction, and product. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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THPT Chemistry Practice Questions - Ky thi tot nghiep THPT - Mon Hoa hoc (Vietnam High School Graduation Chemistry Exam) Exam

This practice set contains 100 questions from the matching question bank and focuses on acid, metals, solution, reaction, and product. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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