SOLUTIONS Quiz-2

Solutions Quiz-2

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. A 5% solution of cane sugar (molecular weight = 342) is isotonic with 1% solution of substance X. The molecular weight of X is

•  171.2
•  68.4
•  34.2
•  136.2

Solution

Q2.A teacher one day pointed out to his students the peculiar fact that water is a unique liquid which freezes exactly at 0°C and boils exactly at 100℃. He asked the students to find the correct statement based on this fact

•  Water dissolves anything, however sparingly the dissolution may be
•  Water is a polar molecule
•  Boiling and freezing temperatures of water were used to define a temperature scale
•  Liquid water is denser than ice

Solution

Q3.  The vapour pressure (VP) of a dilute solution of non-¬volatile solute is P and the VP of a pure solvent is P°. The lowering of the VP is

•  +ve
•  -ve
•  P/P°
•  P°/P

Solution

Q4. The osmotic pressure of a solution increases if

•  Temperature is lowered
•  Volume is increased
•  Number of solute molecules is increased /span>
•  None of the above

Solution

Q5.On mixing 10 mL of carbon tetrachloride with 10 mL of benzene, the total volume of the solution is

•  > 20 mL
•  < 20 mL
•  =20 mL
•  Cannot be predicted

Solution

Q6. Azeotropic mixtures are

•  Constant boiling point mixture without changing the composition₂ O
•  Those which boil at different temperatures
• Mixtures of two solids
•  None of the above

Solution

Q7.A solution containing 4 g of a non-volatile organic solute, per 100 mL was found to have an osmotic pressure equal to 500 cm of mercury at 27℃. The molecular weight of solute is

•  14.97
•  149.7
•  1697
•  1.497

Solution

Q8.When 20 g of naphthoic acid (C₁₁ H₈ O₂) is dissolved in 50 g of benzene (k_f=1.72 K kg mol^(-1)), a freezing point depression of 2 K is observed. The van’t Hoff factor (i) is

•  0.5
•  1
•  2
•  3

Solution

Q9.When a solution is separated from a solvent by a semi-permeable membrane, then the phenomenon taking place is called as

•  Osmosis
•  Diffusion
•  Solubility
•  None

Solution

Q10. A mixture of benzene and toluene forms

•  An ideal solution
•  Non-ideal solution
•  Suspension
• Emulsion

Solution

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