Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
AP EAMCET201823 Apr 2018Evening ShiftChemistryClassification of Elements and Periodicity in PropertiesActual

Identify the correct statements from the following (i) The atomic radius of Al is lower than the atomic radius of Ga . (ii) Boron exists in many allotropic forms. (iii) The melting point of Ga is lowest among the group 13 elements.

Options

  1. Ai, ii, iii
  2. Bii, iii
  3. Ci, ii
  4. Di, iii

Correct answer

B. ii, iii

Step-by-step solution

Boron exists in many allotropic forms. (i) -rhombohedral (ii) -rhombohedral (iii) -tetragonal in many specific condition it will exists in and -tetragonal forms. The melting point of Ga is lowest in group 13. When we go down to group melting point will increase.

Practice Classification of Elements and Periodicity in Properties on Quantrex Academy →

More from Classification of Elements and Periodicity in Properties

Which of the following is an INCORRECT match? 2026Match List-I with List-II: List-I (Element-Atomic number) List-II (Position in periodic table) (a) Ra – 88 (i) 4^ th period, 13^ th group (b) Ga – 31 (ii) 6^ th period, 6^ th group 2026Which element from following has positive electron gain enthalpy? 2026Which of the following elements belongs to group 2 and sixth period of periodic table? 2026Identify the most electronegative element by the following. 2026Identify increasing order of acidity for following diprotic acids in aqueous solutions. 2026Identify the group of periodic table that contains element Astatine. 2026What happens to the size of atoms in p-block elements when we move from left to right in the same period? 2026 Full Classification of Elements and Periodicity in Properties list All AP EAMCET PYQs