Hydrogen peroxide (H₂O₂) is commonly used as a: MCQ with Answer and Explanation

Hydrogen peroxide (H₂O₂) is commonly used as a:
A. Refrigerant
B. Fertilizer
C. Mild antiseptic and bleaching agent
D. Fuel
Answer: Option C
Solution (By JKSSB Mock Tests)
Hydrogen peroxide is a strong oxidizing agent. In dilute solutions (3-6%), it is used as a mild antiseptic for minor cuts and as a bleaching agent for hair, teeth, and delicate materials like silk and wool. It decomposes into water and oxygen.

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Practice More chemistry Questions

Question #1
The technique used to separate colors in a dye is:
A. Centrifugation
B. Chromatography
C. Distillation
D. Filtration

Correct Answer: Option B


Explanation:
Chromatography separates components of a mixture based on differential affinities between a stationary phase and a mobile phase. In paper chromatography, dyes separate due to different rates of movement. Distillation is for liquids, centrifugation for density-based separation, filtration for solids from liquids. Chromatography is used in forensics, drug testing, and food coloring analysis.

This question belongs to: Science chemistry
Question #2
The main component of CNG is:
A. Ethane
B. Methane
C. Butane
D. Propane

Correct Answer: Option B


Explanation:
CNG (Compressed Natural Gas) is primarily methane (CH₄). LPG is propane and butane. Methane is the simplest hydrocarbon.

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Question #3
Which of the following catalysts is used in the hydrogenation of alkenes?
A. V₂O₅
B. MnO₂
C. Fe
D. Pt or Ni

Correct Answer: Option D


Explanation:
Hydrogenation of alkenes (addition of H₂ across double bond) is catalyzed by finely divided metals like nickel, platinum, or palladium. These adsorb H₂ and the unsaturated compound, facilitating reaction. V₂O₅ is for oxidation (Contact), MnO₂ for H₂O₂ decomposition, Fe for Haber process. Nickel is the most common industrial catalyst for hydrogenation.

This question belongs to: Science chemistry