CHEMISTRY

7c)i=neutral oxides, ii=acidic oxides, iii= amphoteric oxides, iv=basic oxides

1a-v) the e.m.f of d cell=+0.34v-(-0. 76v) =+0.34v+0.76v = +1.10v


7a-ii)1-nature of the ion. 2-temperature.   7a-iii) 1-to prepare electrochemical cells.  2-helps in the extraction of metal by electrolytic method.


7a-i) standard electrode is defined as the potential difference of the system of a solution of ions on coupling with H2/H+  pt  system


2c-i) A and B are separated from C  by filtration method. A and B are then separated from each other by fractional distillation


2b-i)le chatelier's principle states that if an external constraint such as temperature, etc, is imposed in a chemical system at equilibrium, d equilibrium position will shift so as to neutralize or annul the constraint. 


2a-v-i)increasing kinetic energy: solid<liquid<gas. 2a-v-ii)increasing forces of cohesion: gas<liguid<solid.

2a-iv) V1=150cm^3,T1=300k,p=constant,V2=2V1,T2=?. V1/T1=V2/T2, T2=V2T1/V1, T2=2x150cm^3x300K/150cm^3=600K. THE TEMP at which its volume is double is 600K


2aii)charles law states that  the volume of a fixed mass of gas is directly proportional to the absolute temperature at constant pressure

2ai)diffusion is a physical process in which molecules of gases mixed together until equilibrium is attained. it is also the movement of  molecules from a region of  higher to lower

1d)1-methyl orange. 2-methyl orange. 3-phenolphthalein.  1e) E-ammonium chloride. F- sodium hydroxide solution. G-ammonia gas

1cii)heterolytic fission is the fission of organic molecule to form different bond electron distributions. eg CH4


1ci) homologous series is the series of organic compound with the same general formula & method of preparation.eg of homologous series are alkanes which consist of methane,ethane etc.

1biii)the element in each pair have similar chemical properties because the member of each pair have the same valency electrons

1bii)1 -they are soluble in water. 2-they are polar in nature. 3-they can conduct electricity in molten or solution.

1bi)first ionization energy is the energy liberated when a loosely bound electron is removed from a gaseous atom

1aiii)the relative atomic mass of chlorine is not a whole number because chlorine is made of  isotopic mixtures


1aii) the atomic number of an element is the number of protons present in the atom of the element,& the mass number of an element is the number of proton & neutron present in it

1ai) According to Rutherford,the atom has a positive charged  nucleus which is surrounded by negatively charged electrons.

OBJECTIVE
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