NEETChemistryp Block Elements (Group 13 & 14)
Which of the following statements is/are correct for group 13 elements? A. Al reacts with dil. HCl to liberate H ₂ gas B. Al reacts with conc. HNO ₃ to liberate H ₂ gas C. Boron reacts with only acids to liberate H ₂ gas D. Anhydrous AlCl ₃ reacts with moisture to liberate H ₂ gas
Options
- AB, C, D
- BA, B, D
- CA, C
- DA
Correct answer
D. A
Step-by-step solution
A. When Al reacts with dil. HCl , it liberates H ₂ gas. 2 Al +6 HCl ( dil.) 2 AlCl ₃+3 H ₂ . B. When Al reacts with conc. HNO ₃ than it liberates NO gas. Al +4 HNO ₃ (conc.) Al ( NO ₃ )₃+ NO +2 H ₂ O C. Crystalline boron does not react with boiling HCl , HF , HI etc. D. AlCl ₃ reacts with moisture and form aluminium hydroxide. AlCl ₃+3 H ₂ O Al ( OH )₃+3 HCl Hence, option (4) is correct.