Question 1 :
The statement the relative lowering of the vapour pressure is equal to th ratio ot moles of the solute to the total number of the moles in the solution refers to

Question 2 :
At <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ead68fc6694ca4eac0fcc55"> , the highest osmotic pressure is exhibited by 0.1 M solution of

Question 3 :
The energy that opposes the dissolution of a solute in a solvent is called :

Question 5 :
The order of osmotic pressure of isomolar solution of <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ead68d8381c2135355c7df2"> , NaCl and sucrose is

Question 6 :
<i>MX₂</i> dissociates into M²⁺ and <i>X</i> ^- ions in an aqueous solution with a degree of dissociation (α) of 0.5 . The ratio of observed depression of freezing point of the aqueous solution to value of the depression of freezing point in the absence of ionic dissociation.

Question 7 :
Which of the following colligative property can provide molar mass of proteins (or polymers or colloids) with greatest precision?

Question 8 :
A molecule M associates in a given solvent according to the equation {tex} \mathrm { M } \rightleftharpoons ( \mathrm { M } ) _ { n } {/tex}. For a certain concentration of {tex} \mathrm { M } {/tex}, the van't Hoff factor was found to be {tex}0.9{/tex} and the fraction of associated molecules was {tex}0.2{/tex} . The value of {tex} n {/tex} is:

Question 10 :
If 117 g NaCl is dissolved in 1000 g of water the concentration of the solution is said to be

Question 11 :
At {tex} 15 ^ { \circ } \mathrm { C } {/tex} and {tex}1{/tex} atmosphere partial pressure of hydrogen, {tex} 20 \mathrm { mL } {/tex} of hydrogen measured at STP dissolves in {tex} 1 \mathrm { L } {/tex} of water. If water at {tex} 15 ^ { \circ } \mathrm { C } {/tex} is exposed to a gaseous mixture having a total pressure of {tex} 1500 \mathrm { mm } {/tex} of Hg (excluding the vapour pressure of water) and containing {tex} 80 \% {/tex} hydrogen by volumne, then the volume of hydrogen measured at STP that will dissolve in {tex} 1 \mathrm { L } {/tex} of water is

Question 13 :
A solution of sucrose (molar mass=342 g/mol) is prepared by dissolving 68.4 g of it per litre of the solution, what is its osmotic pressure ( <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ead697f6694ca4eac0fcd3f"> ) at 273 K?

Question 14 :
The elevation in boiling point for one molal solution of a solute in a solvent is called :

Question 15 :
The process of getting fresh water from sea water is known as :

Question 16 :
Calculate the molarity of 1 L solution of 93% <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ead687641e6ca4117818bcf"> (weight/volume). The density of the solution is 1.84 g/mL

Question 17 :
When 50 g of lactic acid was mixed with a mixture of equal volume of water and chloroform, the concentration of lactic acid in water was found to be 49.03 g <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ead69b741e6ca4117818e49"> and in chloroform 0.97 g <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ead69b741e6ca4117818e49"> . The distribution coefficient of lactic acid in favour of water is:

Question 19 :
The solubility of a solid in a liquid depends on :

Question 20 :
An aqueous solution of glucose was prepared by dissolving 18 g of glucose in 90 g of water. The relative lowering in vapour pressure is

Question 21 :
The vapour pressure of pure benzene and toluene at a particular temperature are {tex} 100 \mathrm { mm } {/tex} and {tex} 50 \mathrm { mm } {/tex} respectively. Then the mole fraction of benzene in vapour phase in contact with equimolar solution of benzene and toluene is

Question 22 :
The temperature at which vapour pressure of a solvent in its liquid and solid phase becomes same is called :

Question 23 :
0.004 M <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ead68f386ab836963763fbb"> is isotonic with 0.01 M glucose.Degree of dissociation of <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ead687841e6ca4117818bda"> is

Question 24 :
A solution containing 10 g per <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ead68ec86ab836963763f9c"> of urea (mol. mass = 60) is isotonic with a 5% (wt. by vol.) solution of a non-volatile solute. The molecular mass (in g <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ead69b241e6ca4117818e37"> ) of non-volatile solute is :

Question 25 :
The sum of mole fractions of <i>A, B </i>and <i>C</i> in an aqueous solution containing 0.2 moles of each <i>A, B </i>and <i>C</i> is

Question 26 :
At a particular temperature, the vapour pressures of two liquids {tex} \mathrm { A } {/tex} and {tex} \mathrm { B } {/tex} are respectively {tex}120{/tex} and {tex} 180 \mathrm { mm } {/tex} of mercury. If 2 moles of {tex} \mathrm { A } {/tex} and 3 moles of B are mixed to form an ideal solution, the vapour pressure of the solution at the same temperature will be (in mm of mercury)

Question 27 :
The vapour pressure of two liquids <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ead6893381c2135355c7d43"> and <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ead697541e6ca4117818d9a"> are 80 torr and 60 torr respectively. The total vapour pressure obtained by mixing 3 mole of <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ead6893381c2135355c7d43"> and 2 mole of <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ead697541e6ca4117818d9a"> would be :

Question 28 :
A solution containing {tex} 0.85 \mathrm { g } {/tex} of {tex} \mathrm { ZnCl } _ { 2 } {/tex} in {tex} 125.0 \mathrm { g } {/tex} of water freezes at {tex} - 0.23 ^ { \circ } \mathrm { C } {/tex}. The apparent degree of dissociation of the salt is {tex} \left( K _ { f } \text { for water } = 1.86 \mathrm { K } \right. {/tex} {tex} \left. \mathrm { kg } \mathrm { mol } ^ { - 1 } , \text { atomic mass: } \mathrm { Zn } = 65.3 \text { and } \mathrm { Cl } = 35.5 \right) {/tex}

Question 29 :
The temperature at which {tex} 10 \% {/tex} aqueous solution {tex} ( w / v ) {/tex} of glucose will exhibit the osmotic pressure of {tex}14{/tex} bar is -

Question 33 :
The melting point of most of the solid substances increase with an increase of pressure acting on them. However, ice melts at a temperature lower than its usual melting point, when the pressure increase. This is because :

Question 34 :
During osmosis, flow of water through a semipermeable membrane is :

Question 35 :
One mole of non-volatile solute is dissolved in two mole of water. The vapour pressure of the solution relative to that of water is :

Question 36 :
9.8 g of <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ead687641e6ca4117818bcf"> is present in 2 L of a solution. The molarity of the solution is

Question 37 :
Which one of the following is not correct for an ideal solution?

Question 38 :
The vapour pressure of pure liquid is 1.2 atm. When a non-volatile substance <i>B</i> is mixed in <i>A</i>, then its vapour pressure becomes 0.6 atm. The mole fraction of <i>B</i> in the solution is

Question 39 :
Sodium sulphate is soluble in water, while barium sulphate is sparingly soluble because :