Q.
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a
X2+H2O→ H3O+aq+X−aq+O2gΔG° is negative in case of fluorine and is positive in case of iodine
b
Solid I2 has metallic lustre
c
All halogens undergo disproportionation in presence of conc. NaOH
d
Halogens do not react with N2 directly
answer is A.
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