Chemistry
Grade-10
Easy
Question
What is oxidation number of P in K3PO4?
- + 1
- + 5
- - 2
- 0
Hint:
Phosphate has +5 charge.
The correct answer is: + 5
For counting oxidation state we first check whether the compound is neutral or charged. If the compound is neutral we consider total oxidation state to be zero, if charged we consider that particular charge to be the total.
K3PO4 is neutral, phosphate is -3 charged PO43-
x + 4(-2) = -3
x = +5
Oxidation state of P is +5.
Related Questions to study
Chemistry
Which of the following half reactions correctly represents a reduction half reaction?
Which of the following half reactions correctly represents a reduction half reaction?
ChemistryGrade-10
Chemistry
What is oxidation number of Cr in Cr2O72-?
What is oxidation number of Cr in Cr2O72-?
ChemistryGrade-10
Chemistry
An aqueous solution of potassium iodide turns from colorless to brown. What happens to the iodide ions?
An aqueous solution of potassium iodide turns from colorless to brown. What happens to the iodide ions?
ChemistryGrade-10
Chemistry
Which of these equations represents a redox reaction?
Which of these equations represents a redox reaction?
ChemistryGrade-10
Chemistry
In a redox reaction, the species reduced
In a redox reaction, the species reduced
ChemistryGrade-10
Chemistry
Which statement is true?
Mg → Mg2+ + 2e–
Which statement is true?
Mg → Mg2+ + 2e–
ChemistryGrade-10
Chemistry
Which of the following is a chemical change ?
Which of the following is a chemical change ?
ChemistryGrade-10
Chemistry
Which of the following is a physical change?
Which of the following is a physical change?
ChemistryGrade-10
Chemistry
A hot pack is a product that releases heat when chemicals inside of it interact. What is taking place inside an active hot pack?
A hot pack is a product that releases heat when chemicals inside of it interact. What is taking place inside an active hot pack?
ChemistryGrade-10
Chemistry
A student mixed baking soda and vinegar and observed that the reaction was endothermic. When is a reaction endothermic?
A student mixed baking soda and vinegar and observed that the reaction was endothermic. When is a reaction endothermic?
ChemistryGrade-10
Chemistry
A chemical formula found on the arrow between the reactants and products in a chemical equation indicates the presence of a ____________.
A chemical formula found on the arrow between the reactants and products in a chemical equation indicates the presence of a ____________.
ChemistryGrade-10
Chemistry
The symbol (g) found beside a chemical formula indicates that the chemical is _________.
The symbol (g) found beside a chemical formula indicates that the chemical is _________.
ChemistryGrade-10
Chemistry
If a reversible reaction is exothermic in the forward direction, it will be …
If a reversible reaction is exothermic in the forward direction, it will be …
ChemistryGrade-10
Chemistry
What type of reactions are able to change products back to their original form?
What type of reactions are able to change products back to their original form?
ChemistryGrade-10
Chemistry
A change in which the characteristics of a substance are only changed physically and the chemical composition stays the same
A change in which the characteristics of a substance are only changed physically and the chemical composition stays the same
ChemistryGrade-10