Answer the following questions given below:
Kalpana is helping her mother in the kitchen. First, she decides to prepare fresh lemonade for her family. She squeezes lemon juice into a jug of water and adds sugar. She notices the lemonade is very sour and she sprinkles little baking soda into the lemonade. Immediately, she observes bubbling and fizzing, and the taste becomes milder.
Later, Kalpana starts washing the dishes. She spills some vinegar onto the countertop. She uses soapy water to clean it. Curious about their chemical nature, she decides to check their behavior using the indicators methyl orange and phenolphthalein.
1. If she uses phenolphthalein, which of the above substances would turn pink?
2. If she uses methyl orange, which of the above substances would turn red?
3. Which of the following properties would help to identify whether the given solutions are acidic or basic?