Question 1 :
Blood cells retain their normal shapes in solutions which are :
Question 2 :
The vapour pressure of a dilute solution is not influenced by :
Question 3 :
The movement of solvent molecules through a semipermeable membrane is called
Question 4 :
Binary liquid solutions which exhibit negative deviations from Raoult's law boil at temperature .than the expected value :
Question 5 :
A 5% solution of sugarcane (mol. wt. = 342) is isotonic with 1% solution of <i>X</i> under similar conditions. The molecular weight of <i>X</i> is
Question 6 :
The volume of 10 N and 4 N HCl required to make 1L of 7 N HCl are
Question 8 :
If 117 g NaCl is dissolved in 1000 g of water the concentration of the solution is said to be
Question 12 : Vant Hoff factor of aq <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ead68cd41e6ca4117818c84"> at infinite dillution has value equal to
Question 13 :
In cold countries, ethylene glycol is added to water in the radiators of cars during winters. It results in :
Question 14 :
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 15 :
A solution of two liquids boils at a temperature more than the boiling point of either them. Hence, the binary solution shows
Question 16 :
An aqueous solution of glucose is 10% in strength. The volume in which 1 g-mole of it is dissolved will be
Question 17 :
The process of getting fresh water from sea water is known as :
Question 18 :
Formation of a solution from two components can be considered as<br>(i) Pure solvent {tex} \rightarrow {/tex} separated solvent molecules, {tex} \Delta \mathrm { H } _ { 1 } {/tex} <br>(ii) Pure solute {tex} \rightarrow {/tex} separated solute molecules, {tex} \Delta \mathrm { H } _ { 2 } {/tex} <br> (iii) Separated solvent and solute molecules {tex} \rightarrow {/tex} Solution {tex} \Delta \mathrm { H } _ { 3 } {/tex}<br> Solution so formed will be ideal if<br>
Question 19 :
In a mixture of <i>A</i> and <i>B</i>, components show negative deviation when
Question 20 :
When a solute distributes itself between two immiscible liquids in contact with each other, a mathematical constant ratio exists between :
Question 21 :
The molarity of the solution obtained by dissolving 2.5 g of NaCl in 100 mL of water is
Question 22 :
At a suitable pressure near the freezing point of ice, there exists :
Question 23 :
Which of the following statements about the composition of the vapour over an ideal {tex} 1 : 1 {/tex} molar mixture of benzene and toluene is correct? Assume that the temperature is constant at {tex} 25 ^ { \circ } \mathrm { C } {/tex} . (Given, vapour pressure data at {tex} 25 ^ { \circ } \mathrm { C } , {/tex} benzene {tex} = 12.8 \mathrm { kPa } {/tex} , toluene {tex} = 3.85 \mathrm { kPa } {/tex} )
Question 24 :
A solution is prepared by mixing {tex} 8.5 \mathrm { g } {/tex} of {tex} \mathrm { CH } _ { 2 } \mathrm { Cl } _ { 2 } {/tex} and {tex} 11.95 \mathrm { g } {/tex} of {tex} \mathrm { CHCl } _ { 3 } {/tex}. If vapour pressure of {tex} \mathrm { CH } _ { 2 } \mathrm { Cl } _ { 2 } {/tex} and {tex} \mathrm { CHCl } _ { 3 } {/tex} at {tex} 298 \mathrm { K } {/tex} are {tex} \mathrm { 415}{/tex} and {tex} 200 \mathrm { mm } \mathrm { Hg } {/tex} respectively, the mole fraction of {tex} \mathrm { CHCl } _ { 3 } {/tex} in vapour form is: (Molar mass of {tex} \mathrm { Cl } = 35.5 \mathrm { g } \mathrm { mol } ^ { - 1 } {/tex} )
Question 25 :
The vapour pressure of a solvent decreases by 10 mm of mercury when a non-volatile solute was added to the solvent. The mole fraction of the solute in the solution is 0.2. What should be the mole fraction of the solvent if the decrease in vapour pressure is to be 20 mm of mercury ?
Question 26 : The vapour pressure of water at <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ead68e9381c2135355c7e02"> is 17.54 mm. When 20 g of a non-ionic, substance is dissolved in 100 g of water, the vapour pressure is lowered by 0.30 mm. What is the molecular mass of the substance?
Question 27 :
0.5 molal aqueous solution of a weak acid (HX) is 20{tex} \% {/tex} ionised. If {tex} K _ { f } {/tex} for water is {tex}1.86\, \mathrm { K }\, \mathrm { kg }\, \mathrm { mol } ^ { - 1 } {/tex} , the lowering in freezing point of the solution is
Question 28 :
If the various terms in the given below expressions have usual meanings, the van't Hoff factor {tex} \mathrm ( i ) {/tex} cannot be calculated by which one of the following expressions
Question 29 :
The vapour pressure of a solution of the liquids {tex} \mathrm { A } \left( P ^ { \circ } = 80 \mathrm { mm } \text { Hg and } x _ { \mathrm { A } } = 0.4 \right) {/tex} and {tex} \mathrm { B } \left( P ^ { \circ } = 120 \right. {/tex} {tex} \left. \mathrm { mm } \mathrm { Hg } \text { and } x _ { \mathrm { B } } = 0.6 \right) {/tex} is found to be {tex} 100 \mathrm { mm } {/tex} {tex} \mathrm {Hg} {/tex}. It shows that the solution exhibits
Question 30 :
The vapour pressure of benzene at a certain temperature is {tex} 640\,\mathrm { mm } {/tex} of Hg. A non-volatile and non-electrolyte solid, weighing 2.175{tex} \mathrm { g } {/tex} is added to 39.08 of benzene. The vapour pressure of the solution is {tex} 600\,\mathrm { mm } {/tex} of Hg. What is the molecular weight of solid substance?
Question 31 :
How many grams of methyl alcohol should be added to {tex} \mathrm { 10\ litre}{/tex} tank of water to prevent its freezing at {tex} 268 \mathrm { K } ? ( \mathrm { K } _ { \mathrm { f } } {/tex} for water is {tex} 1.86 \mathrm { K } \mathrm { kg } \mathrm { mol } ^ { - 1 } {/tex} )
Question 32 :
The freezing point depression constant for water is {tex} - 1.86 ^ { \circ } \mathrm { C } \mathrm { m } ^ { - 1 } {/tex} . If {tex}5.00\, \mathrm { g }\, \mathrm { Na } _ { 2 } \mathrm { SO } _ { 4 } {/tex} is dissolved in 45.0{tex} \mathrm { g } \mathrm { H } _ { 2 } \mathrm { O } {/tex} , the freezing point is changed by {tex} - 3.82 ^ { \circ } \mathrm { C } {/tex} . Calculate the van't Hoff factor for {tex} \mathrm { Na } _ { 2 } \mathrm { SO } _ { 4 } {/tex} .
Question 34 :
The phenomenon in which crystals on subjecting to a pressure or mechanical stress produce electricity is called :
Question 35 :
In a crystal some ions are missing from normal sites. This is an example of :
Question 39 : An ionic compound is expected to have tetrahedral structure if <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ead48a9381c2135355c6d14"> lies in the range of
Question 40 :
The phenomenon in which polar crystals on heating produce electricity is called :
Question 41 : A metallic element crystallises into lattice containing a sequence of layers of <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ead484e86ab836963762e5a"> . Any packing of spheres leaves out void in the lattice. The empty space in percentage by volume in this lattice is :
Question 42 :
Which is the wrong statement regarding a crystal containing Schottky defect?
Question 43 :
Lithium metal crystallises in a body centred cubic crystal. If the length of the side of the unit cell of lithium is 351 pm, the atomic radius of the lithium will be :
Question 44 :
The percentage of {tex} \mathrm { Fe } ^ { + 3 } {/tex} ion present in {tex} \mathrm { Fe } _ { 0.93 } \mathrm { O } _ { 1.00 } {/tex} is
Question 46 :
X- rays of wavelength equal to 0.134 nm give a first order diffraction from the surface of a crystal when the value of θ is 10.5º. The distance between the planes in the crystal parallel to the surface is (sin 10.5º = 0.1822)
Question 47 :
The three states of matter are solid, liquid and gas, which of the following statements are correct about them?
Question 48 :
If we mix a pentavalent impurity in a crystal lattice of germanium, what type of semiconductor formation will occur?
Question 53 :
The edge length of unit cell of a metal having molecular weight {tex} 75 \mathrm { g } / \mathrm { mol } {/tex} is {tex} 5 \mathrm { A } {/tex} which crystallizes in cubic lattice. If the density is {tex} 2 \mathrm { g } / \mathrm { cc } {/tex} then find the radius of metal atom. {tex} \left( \mathrm { N } _ { \mathrm { A } } = 6 \times 10 ^ { 23 } \right) . {/tex} Give the answer in pm.
Question 54 :
An element (atomic mass = 100 g/mol having {tex}bcc{/tex} structure has unit cell edge 400{tex} \mathrm { pm } {/tex} . The density of element is
Question 55 :
The second order Bragg diffraction of X-rays with {tex} \lambda = 1.0 \space {\text{Å}} {/tex} from a set of parallel planes in a metal occurs at an angle of {tex} 60 ^ { \circ } . {/tex} The distance between the scattering planes in the crystal is
Question 56 :
A metal has a fcc lattice. The edge length of the unit cell is {tex} 404 \mathrm { pm } . {/tex} The density of the metal is {tex} 2.72 \mathrm { g } \mathrm { cm } ^ { - 3 } . {/tex} The molar mass of the metal is:<br>({tex}N_{A }{/tex} Avogadro's constant {tex} = 6.02 \times 10 ^ { 23 } \mathrm { mol } ^ { - 1 } {/tex} )<br>
Question 57 :
A solid is made of two elements {tex} X {/tex} and {tex} Z . {/tex} The atoms {tex} Z {/tex} are in {tex}ccp{/tex} arrangement while the atoms {tex} X {/tex} occupy all the terrahedral sites. What is the formula of the compound?
Question 58 : When light strikes a photographic <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ead486f6694ca4eac0fbcbf"> paper, silver atoms move in through these defects to :
Question 59 :
A solid {tex}\mathrm{AB}{/tex} crystallises as {tex}\mathrm{NaCl}{/tex} structure and the radius of the cation is {tex} 0.100 \mathrm { nm } {/tex}. The maximum radius of the anion can be:
Question 60 :
The cubic unit cell of a metal (molar mass {tex} = 63.55 \mathrm { g } \mathrm { mol } ^ { - 1 } {/tex} ) has an edge length of {tex} 362 \mathrm { pm } {/tex}. Its density is {tex} 8.92 \mathrm { g } \mathrm { cm } ^ { - 3 } {/tex}. The type of unit cell is
Question 61 :
Lithium has a {tex}bcc{/tex} structure. Its density is 53 0{tex} \mathrm { kg } \mathrm { m } ^ { - 3 } {/tex} and its atomic mass is 6.94 {tex} \mathrm { g } \mathrm { mol } ^ { - 1 } {/tex} . Calculate the edge length of a unit cell of lithium metal. {tex} \left( N _ { A } = 6.02 \times 10 ^ { 23 } \mathrm { mol } ^ { - 1 } \right) {/tex}
Question 62 :
Each unit cell of {tex} \mathrm { NaCl } {/tex} consists of {tex} 14 \mathrm { Cl } ^ { - } {/tex} ions and
Question 63 :
In a face centred cubic lattice, atoms of {tex}\mathrm{A}{/tex} form the corner points and atoms of {tex}\mathrm{B}{/tex} form the face centred points. If two atoms of {tex}\mathrm{A}{/tex} are missing from the corner points, the formula of the ionic compound is:
Question 64 :
Which of the following statement are correct for the ionic solids in which positive and negative ions are held by strong electrostatic attractive forces ?
