-
Anonymous users2024-01-24A. Sodium hydroxide is alkaline and can be used to remove oil stains, correct;
B. Sodium hydroxide is corrosive and has a strong corrosive effect on the skin, right;
C. Sodium hydroxide solid releases a large amount of heat when dissolved in water, correct;
D. The aqueous solution of sodium hydroxide can make the litmus test solution blue, which is wrong;
So choose D
A. Sodium hydroxide is alkaline and can be used to remove oil stains, correct; >>>More
Sodium hydroxide is the most concentrated: can't saturated solutions?
It can be rushed, but it doesn't work well.
Dirt (salts) in toilets are generally better removed with acid. >>>More
Toilets require acidic substances, and toilet fouling is basically part of the calcium compound, which can be oxalic acid. >>>More
Hydrofluoric acid can, sodium hydroxide theoretically can, but it's too slow, and hydrofluoric acid may not be in the toilet.