The answers to the question are presented below by letter.
a.) redox reaction - Cl2 is reduced and OH- is oxidized
b.)
c.) acid - base reaction
d.) redox reaction - Fe is oxidized and O2 is reduced
e.) redox reaction - Ca is oxidized and F2 is reduced
The answer to your question is the first one!
The shape that is formed by the free surface, which is called a hyperboloid, or "Gabriel's Horn". The core of a vortex in air is sometimes visible because a plume of water vapor that is caused by condensation in the low pressure and low temperature of the core. An example of this is the sprout of a tornado. Vortices form in stirred fluids and could be observed in phenomena such as smoke rings, whirlpools in the wake of a boat, or the winds surrounding a tornado or dust devil.
N just use a electronegativity table