Chemistry- What's the answer for this question?

Practice Question Solving
1

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
2

Hi!

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

2 Likes
3

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:

4

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

5

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 ?

6

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