Chemistry in Everyday Life Quiz - ICSE Class 12 Chemistry

Free practice quiz: Chemistry in Everyday Life (ICSE Class 12 Chemistry). 31 multiple-choice questions with answers and explanations. Play online, no sign-up needed.

Sample questions

1. Which of the following is NOT a common application of soaps and detergents in everyday life?

   1. Cleaning of fabrics
   2. Emulsification of oils in water for laundry
   3. Sterilization of medical equipment
   4. Removal of grease and grime from surfaces
   Show answer

   Answer: C. Sterilization of medical equipment

   Soaps and detergents are primarily used for cleaning due to their ability to emulsify oils and dirt. While some detergents might have mild antiseptic properties, sterilization of medical equipment requires more potent antimicrobial agents or physical methods like autoclaving. Soaps and detergents are not designed for this purpose.

2. Which of these compounds is a broad-spectrum antibiotic that inhibits bacterial protein synthesis by binding to the 30S ribosomal subunit?

   1. Penicillin
   2. Streptomycin
   3. Aspirin
   4. Paracetamol
   Show answer

   Answer: B. Streptomycin

   Streptomycin is an aminoglycoside antibiotic. Antibiotics like penicillin work by inhibiting bacterial cell wall synthesis, while aspirin and paracetamol are analgesics and antipyretics, not antibiotics. Streptomycin specifically targets the 30S ribosomal subunit in bacteria.

3. Which of the following is a major consequence of water pollution that can lead to eutrophication in water bodies?

   1. Increased dissolved oxygen levels
   2. Excessive growth of aquatic plants and algae
   3. Reduction in water temperature
   4. Decreased nutrient levels
   Show answer

   Answer: B. Excessive growth of aquatic plants and algae

   Eutrophication is caused by an excessive enrichment of water bodies with nutrients, typically nitrates and phosphates. This leads to rapid growth of algae and aquatic plants, which can then die and decompose, consuming dissolved oxygen and harming aquatic life.

4. The smell of ripe apples is mainly due to the presence of which class of organic compounds?

   1. Aldehydes
   2. Ketones
   3. Esters
   4. Ethers
   Show answer

   Answer: C. Esters

   Esters are known for their characteristic fruity and floral odors. Many volatile esters are responsible for the aroma of ripe fruits, including apples. For example, ethyl butanoate contributes to the apple aroma.

5. Which of the following is a narcotic analgesic, often derived from opium, that is used medically for pain relief but has a high potential for addiction?

   1. Aspirin
   2. Paracetamol
   3. Morphine
   4. Ibuprofen
   Show answer

   Answer: C. Morphine

   Morphine is a potent opioid analgesic derived from the opium poppy. It is highly effective for severe pain but also carries a significant risk of addiction and dependence.

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