Question

en temperatu lder 4. Place the following substances in order of decreasing vapor pressure at a given CF. PF BrF, BrF, > PFS > CF Brf > CF, > PES PF, > BrF, > CF CF, > BrF, > PFS CF, > PF > BrFs C d 5. Define critical point. 2 The temperature and pressure above which a supercritical fluid exists. bThe temperature and pressure where liquid, solid, and gas are equally stable and are in equilibrium c. The temperature and pressure are equal. d. The temperature and pressure are not cqual. 6. Why is water an extraordinary substance? a Water has a low molar mass, yet it is a liquid at room temperature, b. Water is the main solvent within living organisms. Water has an exceptionally high specific heat capacity. d Water has strong hydrogen bonding. c. All of the above 7. Which is expected to have the largest dispersion forces? a CHE & C.HR C F d Si H & List the compounds in order of decreasing boiling point. CHO CHỊ RU CH CHO a CH0 CHICH CHO > Rn b. Rn > CHO CHỊ > CH CHO © CHO CHỊ > Rn > CHÚCHO d. CH3CHO 2 CHO CHỊ > Rn & Rn > CHỊCHO > CHO CHỊ 9. Choose the substance with the lowest surface tension CH,SeCH.CH b, CHỊCHỊCH CHI 6. CH 4. He (CH),SO

Answer 1

Ans 4

Option E is the correct answer

Higher the polarity of compound, greater will be the dispersion forces and lower its vapor pressure.

Polarity of given compounds in increasing order

CF4 < PF5 < BrF3

BrF3 has highest polarity therefore BrF3 will have the lowest vapor pressure. In order of decreasing vapor pressure

CF4 > PF5 > BrF3