Identify the element being oxidized and the olemer being reduced.
1) NO2 + MnO4->NO3 +Mn+2 (in acid solution)

2) 1- + MnO4 -> I2 + MnO2 (in basic solution)

3) KMnO4 + HCI + H2S -> KCI + MnCI2 + S + H2O

whats the meaning of /

the best answer is d because the strong cohesion is caused by the ability of water molecules to undergo hydrogen bonding.

a is incorrect because when water solidifies, it becomes   ice, which expands and occupies a bigger volume for the same mass of water in its liquid state.

b is incorrect because water has high surface tension. besides bonding to itself it hydrogen bonds to other molecules at the top decreasing possibility for breaking of attractive forces.

c is incorrect because the water molecule has oxygen which is highly electronegative and so pulls the electron pair towards itself creating a dipole moment, making the molecule polar.

e is incorrect because water has strong adhesion, ability to stick to other molecules such as glass because of this molecules having stronger hydrogen bonding than water.