Q1. Which of the following molecules is diamagnetic?A. \( \ce{O2} \)B. \( \ce{B2} \)C. \( \ce{Li2} \)D. \( \ce{NO} \)
Q2. Which molecule has a bond angle of exactly 120° due to \( sp^2 \) hybridization and no lone pairs?A. \( \ce{SO2} \)B. \( \ce{NH3} \)C. \( \ce{BH3} \)D. \( \ce{H2O} \)
Q3. The number of pi bonds in \( \ce{C5H6} \) (cyclopentadiene, \( \ce{C5H6} \) with two double bonds) is:A. 1B. 3C. 4D. 2
Q4. Which molecule has a bond order of 2 and is diamagnetic?A. \( \ce{O2} \)B. \( \ce{B2} \)C. \( \ce{C2} \)D. \( \ce{NO} \)
Q6. Which molecule exhibits paramagnetism due to unpaired electrons?A. \( \ce{N2} \)B. \( \ce{F2} \)C. \( \ce{B2} \)D. \( \ce{H2} \)
Q7. Which molecule has a bond angle of exactly 90° in its octahedral electron geometry?A. \( \ce{PF5} \)B. \( \ce{ClF3} \)C. \( \ce{XeF4} \)D. \( \ce{SF6} \)
Q8. Which molecule has a trigonal bipyramidal shape?A. \( \ce{SF6} \)B. \( \ce{PF5} \)C. \( \ce{BF3} \)D. \( \ce{NH3} \)
Q9. Which molecule has a tetrahedral electron pair geometry but a trigonal pyramidal molecular shape?A. \( \ce{NF3} \)B. \( \ce{BF3} \)C. \( \ce{CH4} \)D. \( \ce{CO2} \)
Q10. The bond order of \( \ce{H2^+} \) ion according to molecular orbital theory is:A. 0.5B. 1C. 1.5D. 2