Determine the oxidation number of all the atoms in the following species: Na2O2 and OF2
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Give an example of characteristics being used to determine how close two species are in evolutionary terms.
The presence of feathers in dinosaurs and birds indicates that they are evolutionarily related. Dinosaurs had feathers not for flying but instead these feathers provided insulation to these warm-blooded animals....
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What do you understand by isoelectronic species? Name a species that will be isoelectronic with each of the following atoms or ions.
Atoms and ions having the same number of electrons are called isoelectronic species. (i) F– ion has 9 + 1 = 10 electrons. Thus, the species isoelectronic with it will also...
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Define oxidation and reduction in terms of oxidation number.
Increase in Oxidation Number is Oxidation and decrease in Oxidation Number is called reduction.
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Determine the oxidation number of all the atoms in the following oxidants: KMnO4, K2Cr2O7 and KClO4.
In KMnO4 K = +1, Mn = +7, O = –2 In K2Cr2O7 K = +1, Cr = +6, O...
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Find the oxidation state of sodium in Na2O2.
Each oxygen in a peroxide is assigned a formal charge of -1. Since sodium peroxide is neutral overall, each sodium atom is assigned an oxidation number of +1.
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Find the oxidation state of sodium in Na2O2.
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State the number of atoms present in each of the following chemical species (a) CO3 2– (b) PO4 3– (c) P2 O5 (d) CO
(a) 4 (b) 5 (c) 7 (d) 2
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Calculate the number of atoms in a cubic unit cell having one atom on each corner and two atoms on each body diagonal.
8 corner × 1/8 atom per unit cell = 1 atom There are four body diagonals in a cubic unit cell and each has two body centre atoms. So, 4 × 2...
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Assign a possible reason for the following : (a) Stability of + 5 oxidation state decreased and that of + 3 oxidation
[Hint : (a) Due to inert pair effect. (b) Due to more bond dissociation enthalpy of O H as compared to S H bond. (c) Due to more steric hindrance...
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Write the electronic configurations of two elements P (atomic number 17) and Q (atomic number 19) and determine
Electronic configuration of ‘P’ : 2,8,7 Group number: 17 Period number: 3 Electronic configuration of Q: 2,8,8,1 Group number: 1 Period number: 4
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