Multiple choice

Which of the following statements is/are incorrect for boron?

P. Kernite is a mineral of boron. Q. 10B is more abundant isotope than 11B. R. Boron has the lower second ionisation enthalpy than aluminium.

  1. Only P

  2. Only Q

  3. Only R

  4. Only P and Q

  5. Only Q and R
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

P. Kernite (Na2B4O7•4H2O) is the mineral of boron. Q. There are two isotopic forms of boron 10B (19%) and 11B (81%). R. Boron (2427 KJ/mol) has the higher second ionisation enthalpy than aluminium (1816 KJ/mol).

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