1) C, grapfhite is a molecular solid as well as covalent solid
2) Freezing point of solution:
TF = KFM
No. of moles of methyl salicylate = wt taken/mol wt = 30/122= 0.246
Molality = No. of moles /wt of solvent in kg = 0.246/0.8 = 0.307
TF = 0.307 x 5.10 =1.568 = Tf solvent - Tfsolution
-Tfsolution = TF - Tf solvent = 1.568-5.50 = -3.93 C
Tfsolution = 3.93 C
3) PV = nRT 4000 mm of Hg = 5.26 atm T = 23+273 = 296 K
5X5.26 = nX 0.0820x 296
n = 26.3/24.30 = 1.082 = wt taken/mol wt
0.924x2= mass of hydrogen = 2.16 gms
4) A supercritical fluid refers to a substance above both its critica temperature and critical pressure.
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