12th Chemistry One Mark Online Test. We covered all the 12th Chemistry One Mark Online Test in this post for free so that you can practice well for the exam.
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12th Chemistry One Mark Online Objective Test for Students
The volume of solution containing 34.2 g of sugar which give rise to the osmotic pressure of 1.75 atm at 0℃ is
(A) 437.5 ml
(B) 347.5 ml
(C) 750.4 ml
(D) 504.7 ml
Option a – 437.5 ml
The vapor pressure of pure water at 25°C is 30 mm. The vapor pressure of 10% glucose solution at the same temperature is
(A) 31.5 mm
(B) 30.6 mm
(C) 29.67 mm
(D) 28.56 mm
Option c – 29.67 mm
10 g of an organic compound per liter produces osmotic pressure of 1.18 atm at 0°C. The molar mass of the compound is (R = 0.082 lit atm)
(A) 78
(B) 94.5
(C) 189.94
(D) 120
Option c – 189.94
6 g of urea is dissolved in 90 g of water. The vapor pressure of the solution in mm Hg is
(A) 745 mm
(B) 758 mm
(C) 761 mm
(D) 760 mm
Option a – 745 mm
When NaCl is added to the urea solution the freezing point of the resulting solution as compared to the urea solution is
(A) Lowered
(B) Raised
(C) No change
(D) Initially lowered then raised
Option c – No change
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