Drawing Conclusions from Observations Practice Test

During lab you have a solution of 1M NaCl at room temperature. You accidentally add so much salt to the solution that you still see some at the bottom of the beaker no matter how vigorously you mix it. What conclusion can you arrive at based upon your knowledge of chemistry?

There is a beaker full of a clear liquid on the counter. It was left unlabeled by your lab partner, and you are required to find out what it is. You perform a number of tests and observe the follwing results.

1. The liquid is miscible with water.

2. You add the liquid to 1M phosphoric acid. The beaker gets extremely warm.

3. You grab a piece of red litmus, and it turns blue upon exposure to the unknown liquid.

Which of the following could be the identity of the unknown liquid?