You can separate a mixture of salt and sand by...
First combing the mixture with water and mix thoroughly until the salt dissolves..
Then you could let the sand settle at the bottom of the salt water, so you can strain salt water to separate the sand from salt water...
To get salt... you would heat up the water to let it evaporate. When all the water is evaporated, the salt will be left behind
Turmeric solution turns red in contact with bases and is not affected by acids and neutral substances. Put one drop of each liquid as the turmeric paper. The liquid whose drop turns the paper red is solution hydroxide (base).
Answer:
A. we can use sulfuric acid to prepare PbSO4
