Chemistry

Oxidation States and Oxides

308 Questions

Oxidation states represent the degree of oxidation of an atom in a chemical compound. This topic covers calculating valency, classifying oxides as acidic or basic, and understanding thermal decomposition. These concepts are frequently tested in chemistry sections across multiple competitive examination platforms.

calculating oxidation statesclassification of oxidesvalency determinationthermal decompositionstability of metal oxides

Oxidation States and Oxides Questions

Multiple choice

What is the general formula for an oxide?

  1. A2O

  2. AO

  3. A2O3

  4. AO2
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The general formula for an oxide is AO, where A represents a metal and O represents oxygen.

Multiple choice

Which of the following is an example of a basic oxide?

  1. Calcium oxide (CaO)

  2. Nitrogen dioxide (NO2)

  3. Silicon dioxide (SiO2)

  4. Hydrogen oxide (H2O)
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Calcium oxide (CaO) is a basic oxide because it reacts with water to form calcium hydroxide (Ca(OH)2), a strong base.

Multiple choice

What is the name of the oxide that is commonly used as a bleaching agent?

  1. Sodium hypochlorite (NaClO)

  2. Calcium hypochlorite (Ca(OCl)2)

  3. Potassium hypochlorite (KOCl)

  4. Magnesium hypochlorite (Mg(OCl)2)
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Sodium hypochlorite (NaClO) is commonly used as a bleaching agent because it is a strong oxidizing agent that can remove stains and kill bacteria.

Multiple choice

What is the name of the oxide that is commonly used as a pigment?

  1. Iron(II) oxide (FeO)

  2. Iron(III) oxide (Fe2O3)

  3. Chromium(III) oxide (Cr2O3)

  4. Titanium dioxide (TiO2)
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Titanium dioxide (TiO2) is commonly used as a pigment because it is a white, opaque powder that can be used to create a variety of colors.

Multiple choice

Which of the following oxides is used in the production of semiconductors?

  1. Silicon dioxide (SiO2)

  2. Gallium arsenide (GaAs)

  3. Indium phosphide (InP)

  4. Cadmium telluride (CdTe)
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Gallium arsenide (GaAs) is commonly used in the production of semiconductors because it is a compound semiconductor with a wide bandgap and high electron mobility.

Multiple choice

What is the name of the oxide that is commonly used as a catalyst?

  1. Vanadium(V) oxide (V2O5)

  2. Chromium(III) oxide (Cr2O3)

  3. Manganese(IV) oxide (MnO2)

  4. Nickel(II) oxide (NiO)
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Vanadium(V) oxide (V2O5) is commonly used as a catalyst because it is a highly active and selective catalyst for a variety of reactions.

Multiple choice

What is the most common oxidation state for transition metals?

  1. +1

  2. +2

  3. +3

  4. +4
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The most common oxidation state for transition metals is +2.

Multiple choice

What is the name of the process by which transition metals lose electrons?

  1. Oxidation

  2. Reduction

  3. Corrosion

  4. Sublimation
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Oxidation is the process by which transition metals lose electrons.