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🔬 Chemistry Most Important MCQs (Complete Book Based) (50 MCQs with Answers – Exam Oriented) 1. Which sugar is present in milk? A. Glucose B. Sucrose C. Maltose D. Lactose ✅ Answer: D. Lactose 2. Which sugar is known as cane sugar? A. Glucose B. Fructose C. Sucrose D. Lactose ✅ Answer: C. Sucrose 3. The sweetest sugar among the following is: A. Glucose B. Maltose C. Fructose D. Sucrose ✅ Answer: C. Fructose 4. Which sugar is called grape sugar? A. Fructose B. Glucose C. Maltose D. Lactose ✅ Answer: B. Glucose 5. Which nitrogenous base is present in RNA instead of thymine? A. Adenine B. Guanine C. Cytosine D. Uracil ✅ Answer: D. Uracil 6. Nitrogenous bases present in RNA are: A. A, G, C, T B. A, G, C, U C. A, T, C, U D. G, C, T, U ✅ Answer: B. A, G, C, U 7. Reaction of R–NH₂ with CHCl₃ and KOH is called: A. Gattermann reaction B. Carbylamine reaction C. Cannizzaro reaction D. Wurtz reaction ✅ Answer: B. Carbylamine reaction 8. Cannizzaro reaction of formaldehyde gives: A. Methane B. Me...