Optical isomerism and chirality from structures

14 questions on Optical isomerism and chirality from structures from the Stereoisomerism chapter: 3 NEET level, 6 JEE Main, 5 JEE Advanced. Each one opens with its answer and solution.

• The compound shown is butan-2-ol drawn without stereochemistry. Which statement about it is correct? NEET level, drawn structure
• The stereoisomer of 2,3-dibromobutane shown has two stereocentres. Which statement about it is correct? NEET level, drawn structure
• The compound shown is 4-ethyl-3-methylheptan-2-ol drawn without stereochemistry. How many stereocentres (sp3 carbons bearing four different groups) does it have... JEE Main level, drawn structure
• The compound shown is 2,3-dibromobutane drawn without stereochemistry. Which of the four stereo drawings shown as options is its meso (achiral) stereoisomer? JEE Main level, drawn structure
• The stereoisomer of tartaric acid (2,3-dihydroxybutanedioic acid) shown is drawn with wedges. Which of the following statements about the compound shown are cor... JEE Main level, drawn structure
• Propadiene (allene), shown, is achiral. In an allene the two terminal CH2 planes are perpendicular to each other. Which of the cumulated polyenes shown as optio... JEE Advanced level, drawn structure
• Biphenyl, shown, rotates freely about the inter-ring bond and is achiral. Assume that rotation about the inter-ring bond is completely blocked whenever all four... JEE Advanced level, drawn structure
• The compound shown is 2-isopropyl-5-methylcyclohexan-1-ol (the menthol skeleton) drawn without stereochemistry. How many stereocentres does it have? Give an int... JEE Main level, drawn structure
• The compound shown is 2,3,4,5-tetrachlorohexane drawn without stereochemistry. Counting only configurational isomers, how many of its stereoisomers are achiral ... JEE Advanced level, drawn structure
• The compound shown is 3-methylpent-1-ene drawn without stereochemistry. Which of the following statements about it are correct? JEE Main level, drawn structure
• Cyclopropane, shown, has no stereoisomers. Treat all rings as planar and consider configuration only. Which one of the ring compounds shown as options is chiral... JEE Advanced level, drawn structure
• The compound shown is one enantiomer of 1-chloro-1-phenylethane. The compound shown is best described as NEET level, drawn structure
• The compound shown is 2,3,4-trichloropentane drawn without stereochemistry. Counting configurational isomers only, which of the following statements are correct... JEE Advanced level, drawn structure
• The compound shown is one stereoisomer of 1,2-dibromocyclohexane. Consider configuration only (treat the ring as planar). Which statement is correct? JEE Main level, drawn structure