The pH of 0.004 M hydrazine solution is 9.7. its ionisation constant (

1.	The pH of 0.004 M hydrazine solution is 9.7. its ionisation constant (K_(b)) is
Answer» `7.79xx10^(-8)` `4.49xx10^(-9)` `1.67xx10^(-10)` `6.25xx10^(-7)` ANSWER :D

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