Substitution vs elimination outcome for drawn substrates

13 questions on Substitution vs elimination outcome for drawn substrates from the Organic Reaction Mechanisms IV: Elimination chapter: 2 NEET level, 6 JEE Main, 5 JEE Advanced. Each one opens with its answer and solution.

• The halide shown is heated with a concentrated solution of sodium ethoxide in ethanol. Which pathway predominates? NEET level, drawn structure
• The halide shown is treated with sodium cyanide in DMSO. Which structure is the major product? NEET level, drawn structure
• The halide shown is used in the reactions below. Select all correct statements. JEE Main level, drawn structure
• The halide shown is allowed to solvolyse in an ethanol-water mixture with no added strong base. Select all correct statements. JEE Main level, drawn structure
• The compound shown is warmed with dilute aqueous sodium hydroxide. Loss of water gives which major organic product? JEE Main level, drawn structure
• The enantiomerically pure halide shown reacts with sodium cyanide in DMSO, which favours a bimolecular substitution. Which structure is the major product? JEE Main level, drawn structure
• The optically active halide shown is stirred in aqueous acetone, where the substitution proceeds by an SN1 mechanism. What is the expected stereochemical outcom... JEE Main level, drawn structure
• The halide shown has no hydrogen on the carbon next to the carbon bearing bromine. Select all correct statements. JEE Advanced level, drawn structure
• The halide shown (axial bromine in the reactive chair) is treated with sodium azide in DMF, a good nucleophile that is only weakly basic. Which structure is the... JEE Advanced level, drawn structure
• The enantiomerically pure halide shown is treated with the reagents below. Select all correct statements. JEE Advanced level, drawn structure
• The halo ketone shown is stirred with dilute aqueous sodium hydroxide at room temperature. Which description of the major pathway and product is correct? JEE Advanced level, drawn structure
• Excess sodium amide in liquid ammonia converts the vicinal dibromide shown into propyne, which is deprotonated at its terminal carbon by the same base (before a... JEE Advanced level, drawn structure
• The compound shown is warmed with a trace of dilute sodium hydroxide, and water is lost. Which structure is the major product? JEE Main level, drawn structure