19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
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…
Depression of freezing point for …(i)… is directly proportional to …(ii)… Here, (i) and (ii) refer to
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
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)
Benzoic acid is dissolved in benzene, van’t Hoff factor will be
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
The freezing point of a 0.05 molal solution of a non- electrolyte in water is
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
Van’t Hoff factor more than unity indicates that the solute in solution is (Manipal 2008)
Which of the following pair of solutions are expected to be isotonic at the same temperature?
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 plant cell shrinks when it is kept in
Assertion No compound has both Schottky and Frenkel defects. Reason Both defects change the density of the solid. [AIIMS 2008]
Which of the following is non-crystalline solid
Which of the following is a pseudo solid
On the basis of their magnetic properties, substances can be classified into …A… categories. Here, A refers to
Identify the incorrect statement.
Those substances which show permanent magnetism even in the absence of magnetic field are called
Electrons in a paramagnetic compound are
Solid CO₂ is an example of
Which of the following is an example of metallic crystal solid
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
Which of the following has the highest value of energy gap?
Doping of silicon (Si) with boron (B) leads to
The property of crystalline solid is not