Chemistry In Everyday Life

Concept: Composition of baking powder

Step 1: Baking powder contains NaHCO (base).

Step 2: It also contains weak acid (like tartaric acid).

Step 3: Starch acts as filler and absorbs moisture.

Step 4: Prevents premature reaction.
Conclusion:
Filler = Starch

Concept: Paracetamol (acetaminophen) is a common over-the-counter medication.

Step 1: Pharmacological actions.
• Antipyretic: Reduces fever (pyrexia)
• Analgesic: Relieves pain (mild to moderate) It is not an antiseptic, antibiotic, or anaesthetic.

Step 2: Conclusion. Among the given options, "antipyretic" is correct.

Concept: Amino acids are classified based on the nature of their side chain. Basic amino acids contain extra amino groups or nitrogen-rich groups that can accept protons.

Step 1: Identify basic amino acids
•Lysine → contains extra group → basic
•Arginine → contains guanidine group → strongly basic

Step 2: Check remaining amino acids
•Glutamine → neutral (amide group)
•Leucine, Valine → non-polar (neutral)
•Serine → polar but neutral
•Proline → neutral Final: