Ncert Solutions Chemistry Class 11th
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6 months agoContributor-Level 10
Electrochemical cell is a device in which the redox reaction is carried indirectly and the decrease in free energy appears as electrical energy.
At cathode there is gain of electrons.
At anode there is loss of electrons.
In electrochemical cell anode is written on L.H.S while cathode is written on R.H.S.
New answer posted
6 months agoContributor-Level 10
(b) Oxidation involves gain of one or more electrons by a species during a reaction.
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6 months agoNew answer posted
6 months agoContributor-Level 10
5.42. Dalton's law of partial pressure: When two or more non-reacting gases are enclosed in a vessel, the total pressure of the gaseous mixture is equal to the sum of the partial pressures that each gas will exert when enclosed separately in the same vessel at constant temperature.
P= P1 + P2 + P3
Where, P is the total pressure of the three gases A, B, and C enclosed in a container. P1, P2 and P3 are the partial pressures of the three gases when enclosed separately in the same vessel at a given temperature one by one.
No, the law cannot be applied. Carbon monoxide and oxygen readily combine to form carbon dioxide. The law can be appl
New answer posted
6 months agoContributor-Level 10
(c) In ClO4–, chlorine is in maximum oxidation state of +7. So, it does not show the disproportionation reaction.
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6 months agoContributor-Level 10
5.41. Ideal Gas: A gas that follows Boyle's law, Charles' law and Avogadro law strictly, is called an ideal gas. It is assumed that intermolecular forces are not present between the molecules of an ideal gas.
Real Gases: Gases which deviate from ideal gas behaviour are known as real gases. NH3 is expected to show more deviation. Since NH3 is polar in nature and it can be liquified easily.
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6 months agoContributor-Level 10
(d) In H2O2 oxidation number of O = -1 and can vary from 0 to -2 (+2 is possible in OF2). The oxidation number can decrease or increase, because of this H2O2 can act both asoxidising and reducing agent.
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6 months agoContributor-Level 10
(b) Both are correct statements but reason is not correct for the assertion. The highest oxidation number of a representative element is the group number for the first two groups and the group number minus 10 (following the long form of periodic table) for the other groups.
New answer posted
6 months agoContributor-Level 10
5.40. (a) Surface tension: It is defined as the force acting per unit length perpendicular to the line drawn on the surface.
(b) Surface tension of a liquid depends upon following factors.
(i) Temperature: Surface tension decreases with rise in temperature. As the temperature of the liquid increases the average kinetic energy of the molecules increases. Thus, there is a decrease in intermolecular force of attraction which decreases the surface tension.
(ii) Nature of the liquid: Greater the magnitude of intermolecular forces of attraction in the liquid, greater will be the value of surface tension.
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