Chemistry- What's the answer for this question?

Which of the following statements about water and its solutions are correct?

  1. If the pressure is less than 1.0 atm the boiling point is below 100°
  2. The freezing point of a solution of CaCl2 is below 0° (at a pressure of 1 atm)
  3. The average velocity of steam molecules at a pressure of 2 atm is less than at 1 atm(at the
    same T)
    A. 1 and 2 only
    B. 2 and 3 only
    C. 1 and 3 only
    D. 1,2 and 3
    E. 1 only


the answer, hopefully, is A

1 is right but u wanna be aware that under 0.7 atm the liquid water doesn’t exist.
2 is right. u wanna know that a solution has a wider range than its pure solvent for example solvent water has a freezing point of 0 and boiling point of 100 but with the presence of a solute the freezing point gets lower and the boiling gets higher

3 is wrong because velocity depends only on T and molar mass

btw I love your title hahaha.

hope this helps


haha yeah i didn’t know what else to type for the title lol
anyways, my answer for the question was A as well, but the answer given was D . and that was the confusing part

thanks a lot anywayss :slight_smile:

actualley 3 is correct since the fact you stated is only applicable for ideal gases, so when velocity of real gases decreases with increasing pressure due to larger number of collisions

anyways. i dont think the imat will test us on the opt 3 since it is kinda vague and more advanced than what they usually ask on gases.

btw did u get this from a BMAT book ?

yeah I thought so too, and no this is not from a BMAT book.