The formation of photochemical smog is triggered by__a) sunlightb) ozonec) heatd) wind

The formation of photochemical smog is triggered by "sunlight" or option A. Sunlight is the ultimate source for produce and life. Photochemistry is the branch of chemistry concerned with the chemical effects of light. So in this case the main photochemical smog is triggered by sunlight since how that's what the branch studies in.

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The given information gives us the clue that deuterium and tritium react together. We need to find the balanced nuclear reaction of deuterium and tritium; however, first, let me explain you what deuterium and tritium are.

Deuterium and tritium are two isotopes of hydrogen having atomic mass of 2 and 3 respectively. Deuterium is represented by , whereas tritium is written as .

When deuterium and tritium collide together, they form Helium atom, which is written as , and also release energy (and shoot out one neutron).

Hence, the balanced nuclear reaction will be the following:

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