A) \[HBr\]
B) \[p{{K}_{a}}\]
C) \[{{C}_{6}}{{H}_{5}}C{{H}_{2}}OC{{H}_{3}}\]
D) \[HI\]
Correct Answer: A
Solution :
Gallium (At. no. 31) is soft, silvery metal placed in IIIA group in periodic table. Its melting point is \[log{{[{{N}_{2}}{{O}_{5}}]}_{t}}={{[{{N}_{2}}{{O}_{5}}]}_{0}}+kt\]. This metal expands by 3.1% when it solidifies and hence, should not be stored in glass or metal containers. Gallium also corrode other metals.
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