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Main Group Elements

29 questions · Chemistry · IIT JAM
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Main Group Elements

29 questions · Chemistry · IIT JAM

  1. Hydrolysis of P4​O10​ produces a compound R, which on heating above 320 °C yields a compound S. The compounds R and S, respectively, are2025 · Q14 · MCQ
  2. Dissolution of SbF5​ in BrF3​ produces2025 · Q6 · MCQ
  3. Zn–C bond polarity in the compounds below follows the order Includes diagram2024 · Q28 · MCQ
  4. In the oxidation of phosphorus with oxygen, 0.2 mol of P₄ produces ​ g of P₄O₁₀. (rounded off to one decimal place) [Given: Atomic weight of P = 31; Atomic weight of O = 16]2024 · Q58 · Numerical
  5. The products **X** and **Y** in the following reaction sequence, respectively, are BCl3​NH4​Cl in C6​H5​Cl150∘C​XNaBH4​NaBH4​​Y2023 · Q26 · MCQ
  6. The oxoacid of sulfur that has S−O2​−S bond is2023 · Q9 · MCQ
  7. The structure types of B_{10}H_{10}^{2-} and B_{10}H_{14}, respectively, are2022 · Q17 · MCQ
  8. The reason(s) for the lower stability of Si_{2}H_{6} compared to C_{2}H_{6} is/are2022 · Q36 · Multiple correct
  9. The major product formed in the following reaction K+O2​→ is2022 · Q4 · MCQ
  10. Reaction of BCl₃ with NH₄Cl at 140 °C produces compound P. Further, P reacts with NaBH₄ to give a colorless liquid Q. The reaction of Q with H₂O at 100 °C produces compound R and a diatomic gas S. Among the following, the CORRECT statement…2021 · Q11 · MCQ
  11. The cage – type structure adopted by boron hydride, [B5​H11​], is2020 · Q17 · MCQ
  12. The coordination number of aluminum ion and the number of bridging hydrogen atoms in [Al(BH₄)₄]⁻ are, respectively,2020 · Q20 · MCQ
  13. The boron adduct(s), which show(s) three signals in ¹H NMR spectrum with the intensity ratio 1:2:3 is(are)2020 · Q35 · Multiple correct
  14. The value of 'n' in [Pn​O18​]6− is ​2020 · Q45 · Numerical
  15. The number of lone pairs present in phosphonic acid (phosphorus acid) is ​2020 · Q47 · Numerical
  16. One of the products of the hydrolysis of calcium phosphide at 25° C is2020 · Q7 · MCQ
  17. Among the following compounds, the one having the lowest boiling point is2019 · Q21 · MCQ
  18. In the structure of P₄O₁₀, the number of P-O-P bond(s) is ​.2019 · Q46 · Numerical
  19. Number of vertices in an icosahedral closo-borane is ​.2019 · Q47 · Numerical
  20. On hydrolysis, aluminium carbide produces2018 · Q1 · MCQ
  21. The CORRECT order of melting points of group 15 trifluorides is2018 · Q3 · MCQ
  22. How many of the following interhalogen species have 2 lone pairs of electrons on the central atom? ClF3​,ClF2−​,ClF5​ and ICl2+​2018 · Q51 · Numerical
  23. The correct order of the boiling points of the compounds is2017 · Q1 · MCQ
  24. The number of isomeric structures of di-substituted borazine (B3​N3​H4​X2​) is2017 · Q41 · Numerical
  25. The number of S-S bond(s) in tetrathionate ion is2017 · Q42 · Numerical
  26. The final products in the reaction of BF₃ with water are2016 · Q22 · MCQ
  27. The number of P–H bonds in hypophosphorus acid is __.2016 · Q46 · Numerical
  28. The species responsible for the superacidity of SbF 5​-HSO 3​ F system is2015 · Q2 · MCQ
  29. The characteristics of the blue solution of sodium in liquid ammonia is/are2015 · Q32 · Multiple correct