Fill in the blanks:
`MnO_4^(2-) rarr MnO_4 ^(-) +………….. (I) …………`

Fill in the blanks: Fe^(2+) rarr Fe^(3+) + ………….. (III) …………

Fill in the blanks: Sn^(4+) + ………… (II) ………… rarr Sn^(2+)

Fill in the blanks CH_(4)+Br_(2)rarr....(a)...+HBr

Fill in the blanks. The oxidation state of Cl in HCIO_4 is …….

Observe the relationship between the first two.terms and fill in the bianks:- MnO_4^- : +7 , CrO_4^2- : ________.

In a zinc -manganese dioxide dry cell, the anode is made up of zinc and cathode of a carbon rod surrounded by a mixture of MnO_(2) , carbon, NH_(4)Cl and ZnCl_(2) in aqueous base. The cathodic reaction may be represented as: MnO_(2) + NH_(4)^(+) + e^(-) rarr MnO(OH) + NH_(3) . Let there be 8g MnO_(2) in the cathodic compartment. How many days will the dry cell continue to give a current of 4 xx 10^(-3) ampere ?

Fill in the blanks: ……….. + NaOH overset(Delta) rarr CH_4 + Na_2CO_3