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

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

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

Fill in the blank 1^@ = --- radians

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

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

Fill in the blanks and classy the following reactions into oxidation and reduction: ii) Sn^(4+)+………. rarrSn^(2+)

Fill in the blanks d/(dx) (2x + 3) = ..................

Fill in the blanks and classy the following reactions into oxidation and reduction: iv) Fe^(3+)+…….. rarr Fe^(2+)