19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
A solution of urea (mol. mass 56 g mol–1) boils at 100.18ºC at the atmospheric pressure. If Kf and Kb for water are 1.86 and 0.512 K kg mol–1 respectively, the above solution will freeze at
What weight of glycerol should be added to 600 g of water in order to lower its freezing point by 10ºC? (Kf = 1.86ºC m–1). (Molecular mass of glycerol is 92)
Depression of freezing point for …(i)… is directly proportional to …(ii)… Here, (i) and (ii) refer to
The amount of urea to be dissolved in 500 cc of water (K = 1.86) to produce a depression of 0.186ºC in the freezing point is
Van’t Hoff factor more than unity indicates that the solute in solution is (Manipal 2008)
The molar freezing point constant for water is 1.86º C/m. If 342g of cane sugar (C₁₂H₂₂O₁₁) is dissolved in 1000 g of water, the solution will freeze at
Pure benzene freezes at 5.45ºC at a certain place but a 0.374m solution of tetrachloroethane in benzene freezes at 3.55ºC. The Kf for benzene is
Which of the following colligative properties can provide molar mass of proteins (or polymers of colloids) with greater precision?
60 mL of N/5 H₂SO₄, 10 mL of N/2 HNO₃ and 30 mL of N/10 HCl are mixed together. The strength of the resulting mixture is (UP CPMT 2009)
Van’t Hoff factor of Ca (NO₃)₂ is
Which of the following is not an example of a solution?
A solution containing 10g per dm3 of urea (molecular mass = 60g mol–1) is isotonic with a 5% solution of a non-volatile solute. The molecular mass of this non-volatile solute is
Tetragonal crystal system has the following unit cell dimensions
The number of atoms contained (i) in one body centred cubic unit cell and (ii) in one face centred cubic unit cell, is
If the number of atoms per unit cell in a crystal is 2, the structure of crystal is
Given, Column A Column B A. Ionic solid I. NaCl B. Metallic solid II. Fe C. Covalent solid III. C(graphite) D. Molecular solid IV. Dry ice
Solid CO₂ is an example of
The property of crystalline solid is not
Crystals can be classified into basic crystal habits equal to
The two dimensional coordination number of a molecule in square close packed layer is
In ccp arrangement the pattern of successive layers can be designated as
The formula for determination of density of unit cell is (a) a N g cm N M A x x (b) M g cm a N A Z x x (c) a M g cm N N A x x (d) M N g cm a N A x x
Which of the following is non-crystalline solid
Which of the following is a pseudo solid
The intermetallic compound LiAg crystallizes in cubic lattice in which both lithium and silver have coordination number of eight. The crystal class is