Guiding Class 11 and 12 students through CBSE Chemistry concepts
Q9: The mixture that forms maximum boiling azeotrope is: (NEET 2019)
(a) Water +
Nitric acid
(b) Ethanol + Water
(c) Acetone + Carbon disulphide
(d) Heptane + Octane
Ans: (a)
Maximum boiling azeotrope is
shown by solution which shows negative deviation from Raoult's law. Except
water + Nitric acid, all other mixtures show negative deviation.
Q8: For an ideal solution, the correct option is : (NEET 2019)
(a) Δmix S = 0 at constant T and P
(b) Δmix V ≠ 0 at constant T
and P
(c) Δmix H = 0 at constant T
and P
(d) Δmix G = 0 at constant T
and P
Ans: (c)
For ideal solution,
Δmix H = 0
Δmix S > 0
Δmix G < 0
Δmix V = 0
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