Pinacol rearrangement products of drawn diols

14 questions on Pinacol rearrangement products of drawn diols from the Alcohols, Phenols and Ethers chapter: 3 NEET level, 6 JEE Main, 5 JEE Advanced. Each one opens with its answer and solution.

• The diol shown is heated with dilute H2SO4. Which structure is the major organic product of the pinacol-pinacolone rearrangement? NEET level, drawn structure
• The diol shown is warmed with dilute acid. Water is lost from the carbon that gives the more stable carbocation, and a 1,2-shift then gives a carbonyl compound.... NEET level, drawn structure
• The symmetrical diol shown is treated with dilute H2SO4 and warmed. Which structure is the pinacol rearrangement product? NEET level, drawn structure
• The diol shown is treated with cold dilute acid. Assume the cation forms at the carbon that stabilises it better and that a group on the neighbouring carbinol c... JEE Main level, drawn structure
• The cyclic diol shown is heated with dilute H2SO4. Which structure is the main product (a ring-expansion pinacol rearrangement)? JEE Main level, drawn structure
• The diol shown is warmed with dilute acid. Water leaves from the carbon that gives the more stable cation, and the only group that can move from the neighbourin... JEE Main level, drawn structure
• The diol shown is treated with dilute acid. Take the convention that hydride migrates in preference to methyl, and that water is lost from the more substituted ... JEE Main level, drawn structure
• The diol shown is treated with dilute acid; ignore its stereochemistry. Water may be lost from either carbinol carbon, and either alkyl group on the neighbourin... JEE Main level, drawn structure
• For the pinacol rearrangement of the diol shown (dilute H2SO4, warm), choose all correct statements. JEE Main level, drawn structure
• The diol shown is treated with dilute acid. Water is lost from the carbon whose cation is better stabilised, and then a ring bond migrates. Which structure is t... JEE Advanced level, drawn structure
• The cyclic diol shown is heated with dilute acid to give a single carbonyl product by loss of one molecule of water. Choose all correct statements about the pro... JEE Advanced level, drawn structure
• The diol shown is treated with cold dilute acid. Choose all correct statements. JEE Advanced level, drawn structure
• The diol shown is first heated with dilute H2SO4. The organic product is then treated with excess iodine in sodium hydroxide solution and the mixture is acidifi... JEE Advanced level, drawn structure
• The diol shown is treated with dilute acid. Water is lost from the carbon that gives the diphenyl-stabilised cation. Use the convention that hydride migrates in... JEE Advanced level, drawn structure