Does bleach work against coronavirus on surfaces?

Yes. You can make a disinfecting solution by combining 4 teaspoons (about 20 milliliters) of household bleach and 1 quart (slightly less than 1 liter) of water. Read and follow instructions and precautions. For example, wear gloves and make sure there's good airflow in the room. Don't mix bleach with ammonia or any other cleanser — the combination could produce toxic fumes.