Question : Silver halides are used in photographic plates because they are
Option 1: oxidised in air
Option 2: soluble in hyposolution
Option 3: reduced in light
Option 4: totally colourless
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Correct Answer: reduced in light
Solution : The correct option is reduced in light.
Silver halides are used in photographic plates because they are light-sensitive compounds. When exposed to light, silver halide crystals undergo a chemical reaction that forms a latent image. This latent image can be developed to create a visible image on the photographic plate. This property makes silver halides crucial for capturing and preserving images in traditional film photography.
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Question : A mirage occurs because of:
Option 1: reflction by hot ground
Option 2: total internal reflection by layers of air
Option 3: interference of light
Option 4: diffraction of light
Question : Which light is least effective in photosynthesis ?
Option 1: Blue light
Option 2: Green light
Option 3: Red light
Option 4: Sunlight
Question : The first metal used by man was
Option 1: Aluminium
Option 2: Copper
Option 3: Iron
Option 4: Silver
Question : German silver is an alloy of
Option 1: Copper, nickel and silver
Option 2: Silver ,copper and aluminium
Option 3: Zinc copper and nickel
Option 4: Zinc silver and copper
Question : Which among the following metals is used for galvanisation?
Option 1: Zinc
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