Chemistry
Grade-9
Easy

Question

The chemical formula for an ionic compound of potassium and oxygen is:

  1. KO
  2. K2O
  3. K2O2
  4. KO2

Hint:

Potassium has +1 oxidation state and oxygen has -2 charge.

The correct answer is: K2O


    • Generally compounds are neutral, charges are balanced out.
    • Potassium has +1 oxidation state and oxygen has -2 charge.
    • To balance out the charges two potassium and one oxygen is required.
    • The chemical formula is K2O.

    Related Questions to study

    Grade-9
    Chemistry

    The chemical formula for an ionic compound of aluminum and chlorine is:

    1. AlCl
    2. ClAl
    3. AlCl3
    4. Al3Cl

    The chemical formula for an ionic compound of aluminum and chlorine is:

    ChemistryGrade-9
    1. AlCl
    2. ClAl
    3. AlCl3
    4. Al3Cl
    Grade-9
    Chemistry


    In the compound TiO2, titanium has a charge of :

    1. 4+
    2. 2+
    3. 2-
    4. 4-


    In the compound TiO2, titanium has a charge of :

    ChemistryGrade-9
    1. 4+
    2. 2+
    3. 2-
    4. 4-
    Grade-9
    Chemistry

    The overall charge in a compound must be ____________, So that the charge of iron in Fe2O3 can be calculated as 3+.

    1. 2+
    2. 1+
    3. 0
    4. 1-

    The overall charge in a compound must be ____________, So that the charge of iron in Fe2O3 can be calculated as 3+.

    ChemistryGrade-9
    1. 2+
    2. 1+
    3. 0
    4. 1-
    parallel
    Grade-9
    Chemistry


    The covalent compound N2O5 would be named

    1. Nitrogen oxide
    2. Dinitrogen oxide
    3. Nitrogen pentoxide
    4. Dinitrogen pentoxide


    The covalent compound N2O5 would be named

    ChemistryGrade-9
    1. Nitrogen oxide
    2. Dinitrogen oxide
    3. Nitrogen pentoxide
    4. Dinitrogen pentoxide
    Grade-9
    Chemistry

    An ionic compound made of copper (Cu2+) and oxygen would be named as:

    1. Copper oxygen
    2. Copper oxide
    3. Copper oxide Dicopper oxide
    4. Copper(II) oxide

    An ionic compound made of copper (Cu2+) and oxygen would be named as:

    ChemistryGrade-9
    1. Copper oxygen
    2. Copper oxide
    3. Copper oxide Dicopper oxide
    4. Copper(II) oxide
    Grade-9
    Chemistry

    A covalent compound made of one sulfur and two oxygen atoms would be named as:

    1. Sulfur dioxide
    2. Sulfur oxide
    3. Disulfur oxide
    4. Sulfide oxygen

    A covalent compound made of one sulfur and two oxygen atoms would be named as:

    ChemistryGrade-9
    1. Sulfur dioxide
    2. Sulfur oxide
    3. Disulfur oxide
    4. Sulfide oxygen
    parallel
    Grade-9
    Chemistry

    An ionic compound of calcium and chlorine would be named as:

    1. Calcium chlorine
    2. Calcium chlorite
    3. Calcium chloride
    4. Chlorine calcium

    An ionic compound of calcium and chlorine would be named as:

    ChemistryGrade-9
    1. Calcium chlorine
    2. Calcium chlorite
    3. Calcium chloride
    4. Chlorine calcium
    Grade-9
    Chemistry


    What is the chemical name of NH3?

    1. Nitrogen hydrogen
    2. Nitrogen trihydrogen
    3. Mononitrogen trihydride
    4. Nitrogen trihydride


    What is the chemical name of NH3?

    ChemistryGrade-9
    1. Nitrogen hydrogen
    2. Nitrogen trihydrogen
    3. Mononitrogen trihydride
    4. Nitrogen trihydride
    Grade-9
    Chemistry

    What is the chemical name of LiNO:       

    1. Lithium nitride
    2. Lithium nitrate
    3. Monolithium nitride
    4. Monolithium nitrate

    What is the chemical name of LiNO:       

    ChemistryGrade-9
    1. Lithium nitride
    2. Lithium nitrate
    3. Monolithium nitride
    4. Monolithium nitrate
    parallel
    Grade-9
    Chemistry

    What is the chemical name of C3H8 :        

    1. Tricarbon octahydride
    2. Carbon hydride
    3. Carbon octahydride
    4. Tricarbon hydride

    What is the chemical name of C3H8 :        

    ChemistryGrade-9
    1. Tricarbon octahydride
    2. Carbon hydride
    3. Carbon octahydride
    4. Tricarbon hydride
    Grade-9
    Chemistry

    Which of the following elements can readily forms the ionic compounds:               

    1. Cu and Cl
    2. Na and Cl
    3. Zn and Ag
    4. Al and Fe

    Which of the following elements can readily forms the ionic compounds:               

    ChemistryGrade-9
    1. Cu and Cl
    2. Na and Cl
    3. Zn and Ag
    4. Al and Fe
    Grade-9
    Chemistry

    Name the following: N2O5

    1. Nitrogen oxide
    2. Dinitrogen pentoxide
    3. Nitrous oxide
    4. Nitrogen pentoxide

    Name the following: N2O5

    ChemistryGrade-9
    1. Nitrogen oxide
    2. Dinitrogen pentoxide
    3. Nitrous oxide
    4. Nitrogen pentoxide
    parallel
    Grade-9
    Chemistry

    The compound H3P is called:

    1. Trihydro phosphide acid
    2. Hydrophosphoric acid
    3. Hydrogen(II) phosphide
    4. Hydrogen Phosphide

    The compound H3P is called:

    ChemistryGrade-9
    1. Trihydro phosphide acid
    2. Hydrophosphoric acid
    3. Hydrogen(II) phosphide
    4. Hydrogen Phosphide
    Grade-9
    Chemistry

    What is the chemical formula for Titanium(IV) cyanide

    1. Ti4CN
    2. TiCN
    3. Ti2CN4
    4. Ti(CN)4

    What is the chemical formula for Titanium(IV) cyanide

    ChemistryGrade-9
    1. Ti4CN
    2. TiCN
    3. Ti2CN4
    4. Ti(CN)4
    Grade-9
    Chemistry

    What is the chemical name of the Mg(C2H3O2)2

    1. Magnesium Acetoactetate
    2. Magnesium acetate
    3. Magnesium CarbonHydrogen
    4. Magnesium acetic acid

    What is the chemical name of the Mg(C2H3O2)2

    ChemistryGrade-9
    1. Magnesium Acetoactetate
    2. Magnesium acetate
    3. Magnesium CarbonHydrogen
    4. Magnesium acetic acid
    parallel

    card img

    With Turito Academy.

    card img

    With Turito Foundation.

    card img

    Get an Expert Advice From Turito.

    Turito Academy

    card img

    With Turito Academy.

    Test Prep

    card img

    With Turito Foundation.