Which of the following statement is incorrect? (1) \( \mathrm{C}_{6} \mathrm{H}_{5} \mathrm{~N}_...

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Which of the following statement is incorrect?
(1) \( \mathrm{C}_{6} \mathrm{H}_{5} \mathrm{~N}_{2} \mathrm{Cl} \) is soluble in water
(2) \( \mathrm{C}_{6} \mathrm{H}_{5} \mathrm{~N}_{2} \mathrm{BF}_{4} \) is water insoluble
(3) \( \mathrm{C}_{6} \mathrm{H}_{5} \mathrm{~N}_{2} \mathrm{Cl} \) is stable at room temperature
(4) \( \mathrm{C}_{6} \mathrm{H}_{5} \mathrm{~N}_{2} \mathrm{Cl} \) is stable at \( 0^{\circ} \mathrm{C} \)
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