Question:
Match List-I with List-II
List-I
(A). Hydroquinone
(B). Sodium carbonate
(C). Potassium bromide
(D). Sodium sulfite
List-II
(I). Restrainer
(II). Preservative
(III). Reducing agent
(IV). Accelerator
Choose the correct answer:
Match List-I with List-II
List-I
(A). Hydroquinone
(B). Sodium carbonate
(C). Potassium bromide
(D). Sodium sulfite
List-II
(I). Restrainer
(II). Preservative
(III). Reducing agent
(IV). Accelerator
Choose the correct answer:
List-I
(A). Hydroquinone
(B). Sodium carbonate
(C). Potassium bromide
(D). Sodium sulfite
List-II
(I). Restrainer
(II). Preservative
(III). Reducing agent
(IV). Accelerator
Choose the correct answer:
Show Hint
To easily remember developer chemistry:
- Hydroquinone = Reduces (Developing Agent)
- Carbonate = Accelerates (Alkaline pH)
- Bromide = Restrains (Anti-fog)
- Sulfite = Preserves (Anti-oxidation)
- Hydroquinone = Reduces (Developing Agent)
- Carbonate = Accelerates (Alkaline pH)
- Bromide = Restrains (Anti-fog)
- Sulfite = Preserves (Anti-oxidation)
Updated On: Jul 14, 2026
- (A) - (III), (B) - (I), (C) - (II), (D) - (IV)
- (A) - (II), (B) - (I), (C) - (IV), (D) - (III)
- (A) - (III), (B) - (IV), (C) - (I), (D) - (II)
- (A) - (IV), (B) - (I), (C) - (III), (D) - (II)
Show Solution
Verified By Collegedunia
The Correct Option is C
Solution and Explanation
Step 1: Understanding the Concept:
Manual x-ray film development involves chemical processing using a developer solution.
The developer solution contains several active ingredients, each with a specific chemical role in converting the latent image into a visible metallic silver image.
Step 2: Detailed Explanation:
Let us analyze the function of each chemical component in the developer solution:
- (A) Hydroquinone: This is the primary reducing agent (or developing agent). It chemically reduces the exposed silver halide crystals in the film emulsion to black metallic silver, creating the dark areas of the radiograph.
- (B) Sodium carbonate: This acts as an accelerator (or activator). It provides the necessary highly alkaline pH (typically 10-11) required to swell the gelatin emulsion and activate the reducing agents.
- (C) Potassium bromide: This acts as a restrainer. It prevents the reducing agents from acting on unexposed silver halide crystals, thereby preventing chemical fog on the radiograph.
- (D) Sodium sulfite: This acts as a preservative. It prevents the rapid oxidation of the developing agents by atmospheric oxygen, extending the lifespan of the developer solution.
Matching these gives: (A) - (III), (B) - (IV), (C) - (I), (D) - (II).
Step 3: Final Answer:
The correct matching corresponds to option (C).
Manual x-ray film development involves chemical processing using a developer solution.
The developer solution contains several active ingredients, each with a specific chemical role in converting the latent image into a visible metallic silver image.
Step 2: Detailed Explanation:
Let us analyze the function of each chemical component in the developer solution:
- (A) Hydroquinone: This is the primary reducing agent (or developing agent). It chemically reduces the exposed silver halide crystals in the film emulsion to black metallic silver, creating the dark areas of the radiograph.
- (B) Sodium carbonate: This acts as an accelerator (or activator). It provides the necessary highly alkaline pH (typically 10-11) required to swell the gelatin emulsion and activate the reducing agents.
- (C) Potassium bromide: This acts as a restrainer. It prevents the reducing agents from acting on unexposed silver halide crystals, thereby preventing chemical fog on the radiograph.
- (D) Sodium sulfite: This acts as a preservative. It prevents the rapid oxidation of the developing agents by atmospheric oxygen, extending the lifespan of the developer solution.
Matching these gives: (A) - (III), (B) - (IV), (C) - (I), (D) - (II).
Step 3: Final Answer:
The correct matching corresponds to option (C).
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