Chemistry
Grade-9
Easy
Question
The chemical formula of tetraphosphorus heptoxide is:
- F₄O₁₀
- P₄O7
- PO
- P₁₀O₄
Hint:
The prefix -tetra which means four and -hept means seven.
The correct answer is: P₄O7
- The subscript of the chemical formula is the prefix in the chemical name.
- In the name phosphorus has prefix -tetra which means four and oxygen has prefix -hept means seven.
- The chemical formula is P4O7.
Related Questions to study
Chemistry
What is the chemical formula of Ammonium fluoride?
- NH3F
- NH3F2
- NH4F
- NHF
What is the chemical formula of Ammonium fluoride?
ChemistryGrade-9
- NH3F
- NH3F2
- NH4F
- NHF
Chemistry
What is the chemical formula for Nitrogen triiodide?
- NI
- N, I
- NI3
- None of these
What is the chemical formula for Nitrogen triiodide?
ChemistryGrade-9
- NI
- N, I
- NI3
- None of these
Chemistry
What is the name of N2O3 ?
- Nitrogen trioxide
- Dinitrogen oxide
- Dinitrogen trioxide
- Nitrogen oxide
What is the name of N2O3 ?
ChemistryGrade-9
- Nitrogen trioxide
- Dinitrogen oxide
- Dinitrogen trioxide
- Nitrogen oxide
Chemistry
What is the chemical formula for Tetrasulfur pentoxide?
- SO
- S4O
- S4O5
- S5O4
What is the chemical formula for Tetrasulfur pentoxide?
ChemistryGrade-9
- SO
- S4O
- S4O5
- S5O4
Chemistry
Write the chemical formula of Iodine heptafluoride:
- IF7
- I2F14
- IHF7
- IF6
Write the chemical formula of Iodine heptafluoride:
ChemistryGrade-9
- IF7
- I2F14
- IHF7
- IF6
Chemistry
How many number of sigma bonds are there in 2-Chloro, 3-Methyl Pentane?
- 18
- 20
- 19
- 17
How many number of sigma bonds are there in 2-Chloro, 3-Methyl Pentane?
ChemistryGrade-9
- 18
- 20
- 19
- 17
Chemistry

What is the chemical name of the compound (NH4)2S?
- Ammonium sulfide
- Nitrogen tetrahydrogen sulfide
- Diammonium sulfate
- Ammonium sulfate

What is the chemical name of the compound (NH4)2S?
ChemistryGrade-9
- Ammonium sulfide
- Nitrogen tetrahydrogen sulfide
- Diammonium sulfate
- Ammonium sulfate
Chemistry
The ____________ formula of a compound is written in the simplest whole number ratio of atoms.
- Chemical
- Empirical
- Ionic
- Molecular
The ____________ formula of a compound is written in the simplest whole number ratio of atoms.
ChemistryGrade-9
- Chemical
- Empirical
- Ionic
- Molecular
Chemistry
The chemical formula for an ionic compound of potassium and oxygen is:
- KO
- K2O
- K2O2
- KO2
The chemical formula for an ionic compound of potassium and oxygen is:
ChemistryGrade-9
- KO
- K2O
- K2O2
- KO2
Chemistry
The chemical formula for an ionic compound of aluminum and chlorine is:
- AlCl
- ClAl
- AlCl3
- Al3Cl
The chemical formula for an ionic compound of aluminum and chlorine is:
ChemistryGrade-9
- AlCl
- ClAl
- AlCl3
- Al3Cl
Chemistry

In the compound TiO2, titanium has a charge of :
- 4+
- 2+
- 2-
- 4-

In the compound TiO2, titanium has a charge of :
ChemistryGrade-9
- 4+
- 2+
- 2-
- 4-
Chemistry
The overall charge in a compound must be ____________, So that the charge of iron in Fe2O3 can be calculated as 3+.
- 2+
- 1+
- 0
- 1-
The overall charge in a compound must be ____________, So that the charge of iron in Fe2O3 can be calculated as 3+.
ChemistryGrade-9
- 2+
- 1+
- 0
- 1-
Chemistry

The covalent compound N2O5 would be named
- Nitrogen oxide
- Dinitrogen oxide
- Nitrogen pentoxide
- Dinitrogen pentoxide

The covalent compound N2O5 would be named
ChemistryGrade-9
- Nitrogen oxide
- Dinitrogen oxide
- Nitrogen pentoxide
- Dinitrogen pentoxide
Chemistry
An ionic compound made of copper (Cu2+) and oxygen would be named as:
- Copper oxygen
- Copper oxide
- Copper oxide Dicopper oxide
- Copper(II) oxide
An ionic compound made of copper (Cu2+) and oxygen would be named as:
ChemistryGrade-9
- Copper oxygen
- Copper oxide
- Copper oxide Dicopper oxide
- Copper(II) oxide
Chemistry
A covalent compound made of one sulfur and two oxygen atoms would be named as:
- Sulfur dioxide
- Sulfur oxide
- Disulfur oxide
- Sulfide oxygen
A covalent compound made of one sulfur and two oxygen atoms would be named as:
ChemistryGrade-9
- Sulfur dioxide
- Sulfur oxide
- Disulfur oxide
- Sulfide oxygen