Short Answer TypeWhich of the following is a more stable complex and why?
(i) [Co(NH3)6]3+
(ii) [Co(en)3]3+
An element with density 11.2 g cm-3 forms a f.c.c. lattice with edge length of 4 x10-8
Calculate the atomic mass of the element. (Given: NA = 6.022x 10-23 (mol-1)
Examine the given defective crystal:
Answer the following questions:
(i) What type of stoichiometric defect is shown by the crystal?
(ii) How is the density of the crystal affected by this defect?
(iii) What type of ionic substances shows such defect?
Calculate the mass of compound (molar mass = 256 g mol-1) to be dissolved in 75 of benzene to lower its freezing point by 0.48 K (Kf= 5.12 kg mol-1 )
Write two differences between 'order of reaction' and 'molecularity of reaction?
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Order |
Molecularity |
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The overall order of reaction is the sum of all the exponents of all the reactants present in the rate law expression. |
It is the number of reacting species taking part in an elementary reaction, which must collide simultaneously in order to bring about a chemical reaction. |
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It is determined experimentally. |
It is a theoretical concept. |
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It may be equal to zero or have fractional values. |
It cannot be equal to zero and it always has integral values( which cannot exceed 3) |
Outline the principles behind the refining of metals by the following methods:
Zone refining method
Outline the principles behind the refining of metals by the following methods:
Chromatographic method
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