The reaction 2H₂O₂ → 2H₂O + O₂ is a: MCQ with Answer and Explanation

The reaction 2H₂O₂ → 2H₂O + O₂ is a:
A. Displacement reaction
B. Double displacement reaction
C. Combination reaction
D. Decomposition reaction
Answer: Option D
Solution (By JKSSB Mock Tests)
Hydrogen peroxide decomposes into water and oxygen. A single reactant breaks down into two or more products, so it is a decomposition reaction. This particular reaction can be catalyzed by MnO₂ or light. It is also a disproportionation redox reaction where O in H₂O₂ (-1) goes to -2 in H₂O and 0 in O₂.

Discuss this Question (0)

No comments yet. Be the first to start the discussion!

Practice More chemistry Questions

Question #1
The IUPAC name of methyl alcohol is:
A. Methanol
B. Ethanol
C. Propanol
D. Butanol

Correct Answer: Option A


Explanation:
Methyl alcohol (CH₃OH) is systematically named methanol (meth- = 1 carbon, -ol = alcohol). Ethanol = C₂H₅OH. Propanol = C₃H₇OH. Butanol = C₄H₉OH. Common name 'methyl alcohol' derives from methane. IUPAC names use alkane stem + 'ol'. Methanol is the simplest alcohol.

This question belongs to: Science chemistry
Question #2
The technique of chromatography is used for:
A. Separating solids from liquids
B. Separating dissolved substances by differential adsorption
C. Separating immiscible liquids
D. Boiling point separation

Correct Answer: Option B


Explanation:
Chromatography separates components of a mixture based on their different affinities for stationary and mobile phases. Used for dyes, drugs, amino acids.

This question belongs to: Science chemistry
Question #3
The chemical formula of plaster of Paris is:
A. CaO
B. CaSO₄
C. CaSO₄·½H₂O
D. CaSO₄·2H₂O

Correct Answer: Option C


Explanation:
Plaster of Paris is calcium sulfate hemihydrate, CaSO₄·½H₂O. It is prepared by heating gypsum (CaSO₄·2H₂O) at 373 K. It sets with water to form gypsum.

This question belongs to: Science chemistry