Questions
Which one of the following pairs of reactants does not form oxygen when they react with each other?
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a
F2,NaOH solution (hot, conc.)
b
F2, H2O
c
Cl2, NaOH solution (cold, dilute)
d
CaOCl2, H2SO4 (dilute, small amount)
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Correct option is C
2F2+4NaOH⟶4NaF+2H2O+O2 (Hot, conc) 2F2+2H2O⟶4HF+O2Cl2+2NaOH⟶NaCl+NaClO+H2O2CaOCl2+H2SO4⟶CaCl2+CaSO4+2HCl+O2
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Which of the following properties increases on going down from
F to I in Group VII-A of the periodic table
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