Question

a student adds 5.85 gm of NaCl to 1 litre of water (the pH of which was measured to be 7.0) in a flask (X) to make a 0.1 M solution. He transfers 500 ml into another flask (Y). He covers the flask (Y) with tissue paper and the original flask (X) with a watch glad and goes to watch a movie. When he returns to the lab the next morning, he checks the pH of both the solutions using a perfectly calibrated pH meter. Which of the following is incorrect?
A) X has pH =7 and Y has pH >7
B) X has pH <7 and Y has pH =7
C) X has pH =7 and Y has pH <7
D) Both X and Y have pH =7​

Answer 1

I Think A is incorrect.