19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
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
The freezing point of a 0.05 molal solution of a non- electrolyte in water is
The mole fraction of C₂H₅OH (Mol. wt. = 46) in 5 molal aqueous ethyl alcohol solution is
Depression of freezing point for …(i)… is directly proportional to …(ii)… Here, (i) and (ii) refer to
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)
The volume of water to be added to 100 cm3 of 0.5 N H₂SO₄ to get decinormal concentration is
What will be the molality of a solution of glucose in water which is 10% w/W?
Ethylene glycol is used as an antifreeze in a cold climate. Mass of ethylene glycol which should be added to 4 kg of water to prevent it from freezing at – 6ºC will be (Kf for water = 1.86 K kg mol–1. and molar mass o…
Four solutions of K₂SO₄ with the following concentration 0.1 m, 0.01 m, 0.001 m and 0.0001 m SOLUTIONS are available. The maximum value of van’t Hoff factor, i, corresponds to
If boiling point of water is 1000C. How much gram of NaCl is added in 500 g of water to increase its boiling point by approx o b H O 1 C K 0.52K kg / mole. x (AllMS 2019)
A semipermeable membrane
Vapour pressure of a solution of non-volatile solute 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
The property of crystalline solid is not
Crystals can be classified into basic crystal habits equal to
Which of the following is a pseudo solid
Doping of silicon (Si) with boron (B) leads to
Solid CO₂ is an example of
Which of the following is an example of metallic crystal solid
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
Which of the following has the highest value of energy gap?
Crystalline solid is
The two dimensional coordination number of a molecule in square close packed layer is