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Answer: Hot KMnO4 oxidizes any alkyl group on benzene (with at least one benzylic H) to -COOH, producing benzoic acid regardless of the alkyl chain length.
Answer: Chlorine is electron-withdrawing (inductive effect). More Cl atoms increase acidity by stabilizing the conjugate base (carboxylate anion) through electron withdrawal.
Answer: Some flowers are red and all roses are flowers, so some roses being red is possible but not definite.
Answer: D is C\'s father and C is A\'s mother, so A is the granddaughter of D.
Answer: All except 14 are prime numbers. 14 equals 2 times 7.
Answer: The East and West movements cancel, leaving him 5 km from start.
Answer: SN2 proceeds with Walden inversion: the nucleophile attacks from the back side of the C-Br bond, inverting the stereochemistry from (R) to (S).
Answer: A doctor works in a hospital, a teacher works in a school.
Answer: Walking North then turning right means East for 3 km, placing him North-East of start.
Answer: P is the brother of Q, and R is Q\'s daughter, so P is the uncle of R.
Answer: Apple, Mango, and Banana are fruits. Potato is a vegetable.
Answer: PCl5 converts alcohols to alkyl chlorides: C2H5OH + PCl5 -> C2H5Cl + POCl3 + HCl. The OH group is replaced by Cl.
Answer: Each letter shifted by plus 1 forward. Reversing gives ITSH.
Answer: Each letter shifted by plus 1 gives LFZPCSBF.
Answer: A pen is used to write, a knife is used to cut.
Answer: Maximum stereoisomers = 2^n where n is the number of chiral centers. However, meso compounds may reduce this number if the molecule has internal symmetry.
Answer: The differences are 4, 6, 8, 10, 12. Next term is 30 plus 12 equals 42.
Answer: Since no cat is a dog, it follows that no dog is a cat.
Answer: Each term is multiplied by 2 then plus 1. So 63 times 2 plus 1 equals 127.
Answer: P is brother of Q and Q is sister of R, so P is uncle of R.