Match the LIST-I with LIST-II.
LIST-I | LIST-II | ||
---|---|---|---|
A. | Pnicogen (group 15) | I. | Ts |
B. | Chalcogen (group 16) | II. | Og |
C. | Halogen (group 17) | III. | Lv |
D. | Noble gas (group 18) | IV. | Mc |
Choose the correct answer from the options given below :
Which of the following statements are correct?
A. The process of the addition an electron to a neutral gaseous atom is always exothermic
B. The process of removing an electron from an isolated gaseous atom is always endothermic
C. The 1st ionization energy of the boron is less than that of the beryllium
D. The electronegativity of C is 2.5 in $ CH_4 $ and $ CCl_4 $
E. Li is the most electropositive among elements of group 1
Choose the correct answer from the options given below