Which product contains a strong base that would most likely completely dissolve in water?
drain cleaner
ammonia
baking soda
antacid

The correct answer is option A,

Reason -

A drain cleaner is a base and thus it gets dissolved in water to produce a liquid which has density higher than the water. They mainly consists of sodium hydroxide,  sodium hypochlorite (bleach) and potassium hydroxide as the base material with additives such as aluminium particles, alkynl sulfonate etc. These occurs in both liquid and solid form.

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