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"The valency of oxygen is generally two,...

"The valency of oxygen is generally two, whereas sulphur shows valency of two, four, and six". Explain.

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IIT-JEE PREVIOUS YEAR (CHEMISTRY)-P BLOCK ELEMENTS-Subjective Question
  1. Arrange the following as indicated. CO2,N2 O5, SiO2 and SO3 in the o...

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  2. Give balanced equations for the following : Phosphorous reacts with ...

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  3. "The valency of oxygen is generally two, whereas sulphur shows valency...

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  4. Explain the following in one or two sentences.

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  5. Write balanced equations for the following : (i) Phosphorus is react...

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  6. Complete and balance the following reactions. (i) S + OH^(-) rarr S^...

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  7. Write down the balanced equations for the reaction when calcium phosph...

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  8. Write the resonance structure of nitrous oxide.

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  9. Show with balanced equations what happens when the following are mixed...

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  10. Write the matched set (of three) for each entry in Column A {:(A,B,C...

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  11. Complete and balance the following reactions: i. HNO(3)+HCI rarr N...

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  12. Explain why 'orthophosphoric acid, H3 PO4, is tribasic but phosphorus ...

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  13. Give the structural formula for the following : (i) Phosphorous acid...

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  14. (a) Sulphur melts form a clear mobile liquid at 119^@ C but on further...

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  15. Explan the following in not more than two sentances : (i) Concentrat...

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  16. Write the balanced equation for the reaction of the following compound...

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  17. Draw the molecule structures of XeF(2),XeF(4) and XeO(2)F(2) indicatin...

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  18. Give an example of oxidation of halide by another halogen. Explain the...

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  19. Work out the following using chemical equations: Chlorination of cal...

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  20. Complete the following chemical equations: KI+CI(2)rarr KCIO(3)+I(...

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