Class 12 Chemistry Chapter 18 MCQs – Chemistry of Life

Here we are going to provide class 12 Chemistry chapter 18 Chemistry of Life solved MCQs that help Sindh board students in their exam.

12th Class Chemistry Chapter 18 MCQs with Answers

This 2nd year’s chemistry chapter 18 Sindh board MCQs are also helpful for Karachi, Hyderabad, Larkana, and Sukkur board students in their examination preparation.

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Class 12 Chemistry Chapter 18 MCQs
2nd Year Chemistry Chapter 18 MCQs

1. Brain needs ________ as a source of energy

a) Protein

b) Starch

c) Maltose

d) Glucose

Answer: d) Glucose


2. The glucose is polymerized to form _________

a) Starch

b) Cellulose

c) Cellulose

d) Starch and cellulose

Answer: d) Starch and cellulose


3. Which one of the following are amorphous solid

a) Glucose

b) Monosaccharides

c) Oligosaccharides

d) Polysaccharides

Answer: d) Polysaccharides


4. Glucose is

a) Hexahydroxy aldehyde

b) Hexahydroxy ketone

c) Pentahydroxy aldehyde

d) Pentahydroxy ketone

Answer: c) Pentahydroxy aldehyde


5. The amino acid that contains methyl group as the alkyl part is known as _______

a) Aspartic acid

b) Alanine

c) Glycine

d) None of these

Answer: b) Alanine


6. Which of the following is the simplest amino acid

a) Aspartic acid

b) Alanine

c) Glycine

d) None of these

Answer: c) Glycine


7. Strecker synthesis is used to synthesize ___________.

a) amides

b) amino acids

c) acetylene

d) benzene

Answer: b) amino acids


8. Amino acids which cannot be synthesized in body

a) Non-essentials

b) Proteins

c) Essentials

d) Amino acids

Answer: c) Essentials


9. Gelatin protein is found in

a) Blood

b) Skin

c) Heart

d) Bones

Answer: d) Bones


10. Number of amino acids in protein is.

a) 1000

b) Less than 10,000

c) More than 10,000

d) 2000

Answer: c) More than 10,000


11. Peptide bond is formed by the elimination of which molecule

a) H2O

b) H3O

c) H3CO3

d) HNO3

Answer: a) H2O


12. Rancid butter has foul smell because of ________ acid

a) Sulphuric acid

b) Nitric acid

c) Hydrochloric acid

d) Butanoic acid

Answer: d) Butanoic acid


13. At which temperature margarine is produced by adding hydrogen in vegetable oil

a) 100

b) 150

c) 200

d) 250

Answer: c) 200


14. Molecular formula of palmitic acid is

a) C15H31COOH

b) C17H35COOH

c) C5H30COOH

d) C10H22011

Answer: a) C15H31COOH


15. Identify the fat-soluble vitamins

a) ADEK

b) ADBC

c) BC

d) BCEK

Answer: a) ADEK


16. Which vitamin is soluble in water

a) Vitamin A

b) Vitamin E

c) Vitamin D

d) Vitamin C

Answer: d) Vitamin C


17. Who proposed the name of vitamins

a) Lewis

b) J. Watson

c) F. Crick

d) Funk

Answer: d) Funk


18. Cause of night blindness is

a) Deficiency of Vitamin B

b) Deficiency of Vitamin C

c) Deficiency of Vitamin D

d) Deficiency of Vitamin A

Answer: d) Deficiency of Vitamin A


Conclusion

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