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Silver articles become black on prolonge...

Silver articles become black on prolonged exposure to air. This is due to the formation of ______.

A

`Ag_3NO_3`

B

`Ag_2O`

C

`Ag_2S`

D

`Ag_2S` and `Ag_3NO_3`

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CHETANA PUBLICATION-Metallurgy-EXAMPLE
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  2. Select the odd man out Copper, Gallium, Gold, Silver.

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  3. Select the odd man out Silver, Gold, Platinum, Calcium

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  4. Select the odd man out K2O,Na2O,CaO,Al2O3

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  5. Select the odd man out Malleability, Ductility, Brittleness, Luster

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  6. Select the odd man out Graphite, Iodine, Silver, Phosphorous

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  7. Select the odd man out Sodium oxide, Zinc oxide, Potassium oxide, Ma...

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  8. Select the odd man out Steel, Iron, Copper, Tungsten

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  9. Select the odd man out Galvanizing, Tinning, Anodizing, Roasting

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  10. Select the odd man out Brass, Bronze, Steel, Antimony.

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  11. Find out the correlations: Metal:Reducing agent:: Non-metal:

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  12. Find out the correlations: Brass:Copper and zinc : : Brozne:

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  13. Find out the correlations: Aluminium : Bauxite : : Mercury:

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  14. Find out the correlations: Cryolite : Na3AlF6 : : Fluorspar :

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  15. Find out the correlations: Alumina : Al2O3:: Sodium aluminate:

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  16. Find out the correlations: Coating of tin over metal:Tinning:: Coat...

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  17. Match the columns:

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  18. Match the columns:

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  19. Match the columns:

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  20. Alloy of sodium with mercury.

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  21. Molecular formula of the common ore of aluminium

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