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Sodium thiosulphate, Na2S2O3.5H2O is use...

Sodium thiosulphate, `Na_2S_2O_3.5H_2O` is used in photography to

A

Reduce the AgBr grains to metallic Ag

B

Convert metallic Ag to Ag salt

C

Remove undecomposed AgBras soluble silver thiosulphate complex

D

Removed reduced silver

Text Solution

Verified by Experts

The correct Answer is:
D
`Na_2S_2O_3 + 2AgBr rarr underset("Soluble")(Ag_2S_2O_3) + 2NaBr`
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BRILLIANT PUBLICATION-S-BLOCK ELEMENTS-LEVEL-I
  1. Which of the following decomposes on heating?

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  2. Among the alkali metals, the most abundant metal is

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  3. Sodium thiosulphate, Na2S2O3.5H2O is used in photography to

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  4. Saltpetre is

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  5. A pair of substances which cannot exist together in solution is

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  6. Magnesium uranyl test is used for

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  7. Lithia water used for the treatment of gout is

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  8. The stability of the following alkali metal chlorides follows the orde...

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  9. When a standard solution of NaOH is left in air for a few hours:

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  10. Sodium hydride (NaH) when dissolved in water, produces

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  11. When sodium is added in scanty water, it catches fire. In this process...

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  12. One of the natural minerals of sodium is tincal. Its formula is

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  13. The alkalimetals are low melting. Which of the following alkali metal ...

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  14. Dead burnt plaster is

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  15. The salt of an alkali metal gives yellow colour in the flame test. Als...

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  16. Sodium peroxide which is a yellow solid , when exposed to air bec...

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  17. Which of the following statements is false regarding alkali metals? :...

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  18. The alkali halide which is soluble in pyridine is

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  19. The second ionisation enthalpy of which of the following alkaline eart...

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  20. Which pair of the following chlorides do not impart colour to the fl...

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