SOLUTIONS Quiz-1

Solutions Quiz-1

Dear Readers,

IIT JEE exam which consists of JEE Main and JEE Advanced is one of the most important entrance exams for engineering aspirants. The exam is held for candidates who are aspiring to pursue a career in the field of engineering and technical studies. Chemistry is important because everything you do is chemistry! Even your body is made of chemicals. Chemical reactions occur when you breathe, eat, or just sit there reading. All matter is made of chemicals, so the importance of chemistry is that it's the study of everything..

Q1. The ratio of the value of any colligative property for KCl solution to that of sugar solution is:

•  1
•  0.5
•  2
•  4

Solution

Q2.What would be the freezing point of aqueous solution containing 17 g of C₂ H₅ OH in 1000 g of water. K_{(fH2 O)}=1.86 K m^(-1)

•  -0.69℃
•  -0.34℃
•  0.0℃
•  0.34℃

Solution

Q3.  The osmotic pressure of a solution (density is 1 g mL^(-1)) containing 3 g of glucose (molecular weight = 180) in 60 g of water at 15℃ is

•  0.34 atm
•  0.65 atm
•  6.25 atm
•  5.57 atm

Solution

Q4. The molal freezing point constant of water is 1.86 K m^(-1), If 342 g of cane sugar (C₁₂ H₂₂ O₁₁) is dissolved in 1000 g of water, the solution will freeze at

•  -1.86℃
•  1.86°C
•  -3.92℃
•  2.42℃

Solution

Q5.On mixing 10 mL of acetone with 40 mL of chloroform, the total volume of the solution is

•  < 50 mL
•  > 50 mL
•  =50 mL
•  Cannot be predicted

Solution

Q6. The most likely of the following mixtures to be an ideal solution is

•  NaCl-H₂ O
•  C₂ H₅ OH-C₆ H₆
• C₆H₁₆(l)-H₂ O
•  C₆ H₅ OH-H_2O

Solution
a) NaCl-H₂ O

Q7.FeCl₃ on reaction with K₄ [Fe(CN)₆ ] in aqueous solution gives blue colour. These are separated by a semi-permeable membrane AB as shown. Due to osmosis, there is

•  Blue colour formation in side X
•  Blue colour formation in side Y
•  Blue colour formation in both of sides X and Y
•  No blue colour formation

Solution

Q8.A mixture of volatile components A and B has total vapour pressure (in torr) P=254 -119_χA Where χA is the mole fraction of A in mixture. Hence, P_A° and P_B° are (in torr)

•  254, 119
•  119, 254
•  135, 254
•  154, 119

Solution

Q9.An azeotropic solution of two liquids has boiling point lower than either of them when it

•  Shows negative deviation from Raoult’s law
•  Shows no deviation from Raoult’s law
•  Shows positive deviation from Raoult’s law
•  Is saturated

Solution

Q10. Which has the maximum osmotic pressure at temperature T?

•  100 mL of 1 m urea solution
•  300 mL of 1 M glucose solution
•  Mixture of 100 mL of 1 M urea solution and 300 mL of 1 M glucose solution
• All are isotonic

Solution

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