9. (a). In Na3P :-
3 x Oxididation number of Na + 1 x Oxididation number of P = 0
3 x (+1) + Oxididation number of P = 0
3 + Oxididation number of P = 0
Oxididation number of P = -3
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(b). In H3PO4 :- 3 x Oxididation number of H + 1 x Oxididation number of P + 4 x Oxididation number of O = 0 3 x (+1) + Oxididation number of P + 4 x (-2) = 0 3 + Oxididation number of P - 8 = 0 Oxididation number of P - 5 = 0 Oxididation number of P = +5 |
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(c). In PF3:-
1 x Oxididation number of P + 3 x Oxididation number of F = 0
Oxididation number of P + 3 x (-1) = 0
Oxididation number of P - 3 = 0
Oxididation number of P = +3
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(d). In P4:-
Oxididation number of P = 0
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(e). In PO3- :-
1 x Oxididation number of P + 3 x Oxididation number of O = -3
Oxididation number of P + 3 x (-2) = -3
Oxididation number of P - 6 = -3
Oxididation number of P = -3 + 6
Oxididation number of P = +3
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Therefore, option (b) i.e. H3PO4 is the substance in which P have largest oxidation number. |
9) For which of the following substances does phosphorus (P) have the largest value for oxidation...
10) Which of the following is always true for the oxidation numbers in an oxidation-reduction reaction? a) The value for the oxidation number for atoms of the element being oxidized must increase as we go from reactants to products b) The initial value for the oxidation number for atoms of the element being oxidized must be positive c) The final value for the oxidation number for atoms of the element being oxidized must be positive d) Both band c e)...
10) Which of the following is always true for the oxidation numbers in an oxidation-reduction reaction? a) The value for the oxidation number for atoms of the element being oxidized must increase as we go from reactants to products b) The initial value for the oxidation number for atoms of the element being oxidized must be positive c) The final value for the oxidation number for atoms of the element being oxidized must be positive d) Both b and c...
urgent 10) Which of the following is always true for the oxidation numbers in an oxidation-reduction reaction? a) The final value for the oxidation number for atoms of the element being oxidized must be positive b) The initial value for the oxidation number for atoms of the element being oxidized must be positive c) The value for the oxidation number for atoms of the element being oxidized must increase as we go from reactants to products d) Both a and...
10) Which of the following is always true for the oxidation numbers in an oxidation-reduction reaction? a) The value for the oxidation number for atoms of the element being oxidized must increase as we go from reactants to products b) The initial value for the oxidation number for atoms of the element being oxidized must be positive c) The final value for the oxidation number for atoms of the element being oxidized must be positive d) Both b and c...
7) A buffer solution is formed by adding 0.0100 moles of potassium dihydrogen phosphate (KH2PO4) and 0.0100 moles of potassium hydrogen phosphate (K_HPO4) into 1.000 liters of water. When 0.0010 moles of NaOH is added to this solution, what will happen? a) The pH of the solution will increase by a small amount (< 0.10 pH units) b) The pH of the solution will increase by a large amount > 0.10 pH units) c) The pH of the solution will...
9) For which of the following substances does phosphorus (P) have the largest value for oxidation number? a) Na3P b) H3PO4 c) PF3 d) P4 e) PO33-
7) For the chemical reaction NH(aq) + HCl(aq) → NH"(aq) + Cl(aq) the acid and conjugate base are a)NH(acid): NH" (conjugate base) b) NH, (acid), CT (conjugate base) c) HCl(acid); NH (conjugate base) d) HCl(acid), NH, (conjugate base) c) HCI (acid) Conjugate base) 8) A buffer solution is formed by adding 0.0100 moles of potassium dihydrogen phosphate (KH-PO.) and 0.0100 moles of potassium hydrogen phosphate (K_HPO) into 1.000 liters of water. When 0.0010 moles of NaOH is added to this...
11) Which of the following is true of a catalyst? a) A catalyst is a substance b) A catalyst, when added to a reaction system, increases the rate at which the reaction occurs c) A catalyst is neither produced nor consumed as a reaction proceeds d) Both b and c e) Both a and b and c 12) In the Arrhenius equation, the value for A, the pre-exponential factor, depends on a) the collision frequency (number of collisions per unit...
urgent 9) For which of the following substances does phosphorus (P) have the largest value for oxidation number? a) Na3P b) H3PO4 c) PO, d) PF; e) P4
In the Arrhenius equation, the value for A, the pre-exponential factor, depends on a) the activation energy (the minimum energy needed to convert reactants into products) b) the collision frequency (number of collisions per unit volume and unit time) c) the orientation factor (the fraction of collisions that have an orientation favorable for reaction to occur d) Both b and c e) Both a and b and c