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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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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