12th Chemistry Unit Test Question Paper. We covered all the 12th Chemistry Unit Test Question Paper in this post for free so that you can practice well for the exam.
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12th Chemistry Unit Test Objective Question Paper for Students
Which of the following aqueous solution will have the highest freezing point?
(A) 0.1 M urea
(B) 0.2 M cane sugar
(C) 6 g of glucose in 100 cm³
(D) 1.5 g urea in 500 cm³
Option d – 1.5 g urea in 500 cm³
The molal depression constant for water is 1.86. The freezing point of 0.1 m NaCl is
(A) -1.86°C
(B) -3.72°C
(C) -0.186°C
(D) -0.372°C
Option d – -0.372°C
The freezing point is the temperature at which
(A) the Vapour pressure of the liquid is less than its solid.
(B) The vapor pressure of the liquid is higher than its solid.
(C) The vapor pressure of the liquid is equal to its solid.
(D) The vapor pressure of the liquid is equal to atmospheric pressure.
Option c – The vapor pressure of the liquid is equal to its solid
When a nonvolatile solute like urea is added to the pure solvent the freezing points of the solvent in the solution
(A) Increases
(B) Decreases
(C) Remains constant
(D) Becomes zero
Option b – Decreases
Depression at the freezing point is directly proportional to the
(A) Lowering in vapor pressure
(B) Molality of solution
(C) Molarity of solution
(D) Both ‘a’ and ‘b’
Option d – Both ‘a’ and ‘b’
The cryoscopic constant depends on
(A) the Nature of the Solute
(B) the Nature of the solvent
(C) the Volume of the solvent
(D) the amount of solvent
Option b – the Nature of the solvent
Three liquids A, B, and C boils at 130°C, 160°C, and 190°C respectively. Which of them has higher vapor pressure?
(A) A
(B) C
(C) B
(D) All
Option a – A
We covered all the 12th chemistry unit test question paper above in this post for free so that you can practice well for the exam.
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