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Tartar emetic (potassium antimony tartra...

Tartar emetic (potassium antimony tartrate) is used as an emitic in small does while larger does are poisnous. It is used for the treatment of Kala-azar and such other tropical diseases. It is formed when antimonytrioxide `(Sb_4 O_6)` is treated with potassium hydrogen tartrate. It is.

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In iodometric titrations, an oxidizing agent such as KNnO_(4), K_(2)Cr_(2)O_(7),CuSO_(4),H_(2)O_(2) is allowed to react in neutral medium or in acidic medium with excess of potassium iodide to liberate free iodine Kl+ oxidizon agent to l_(2) Free iodine is titrated against stanard reducing agent usually with sodium thiosulphate i.e., K_(2)Cr_(2)O_(7)+6Kl+7H_(2)SO_(4)toCr_(2)(SO_(4))_(3)+4K_(2)SO_(4)+7H_(2)O+l_(2) 2CuSO_(4)+4Kl to Cu_(2)l_(2)+2K_(2)SO_(4)+l_(2) l_(2)+Na_(2)S_(2)O_(3)to 2Nal+Na_(2)S_(4)O_(6) In iodometric titrations, starch solution is used as an indicator. Starch solution gives blue or violet colour with free iodine. At the end point, blue or violet colour disappear when iodine is completely changed to iodide. A 1.1g sample of copper ore is dissovled and Cu^(2+) (aq.) is treated with Kl.l_(2) liberated required 12.12mL of 0.1M Na_(2)S_(2)O_(3) solution for titration. The % Cu in the ore in the ore is:

CENGAGE CHEMISTRY-P-BLOCK GROUP 15 ELEMENTS - THE NITROGEN FAMILY-Exercises (Single Correct)
  1. Group 15 elements are commonly known as.

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  2. Paris green was used as a pigment due to unique light green colour but...

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  3. Tartar emetic (potassium antimony tartrate) is used as an emitic in sm...

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  4. Which of the following halide does not hydrolyse

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  5. Witting reagent is used for the synthesis of alkenes from ketone in or...

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  6. Pernitric acid is

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  7. Nitrates of all metals are

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  8. Following tests are shown by (i) Decolourisation of acidified soln. ...

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  9. Which of the following acids possesses oxidising, reducing, and comple...

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  10. Acidic hydride of nitrogen is

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  11. Among the trihalides of nitrogen, which is the least basic ?

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  12. PCl5 exists but NCl5 does not because :

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  13. PCl5 and PH3 exist but PH5 does not because

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  14. The structure of phosphide ion is smaller to that of

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  15. Calcium phosphide is used in smoke screen because it.

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  16. Holme's signals produce burning gases which serve as a signal to the a...

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  17. Among the following the strongest acid is

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  18. Basicity of H3 PO4 and H3 PO3 are

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  19. Phosphoric acid is syrupy in nature due to hydrogen bonding. Each mole...

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  20. PCl3, P4 O6 and P4 O10, PCl5 on hydrolysis gives respectivey.

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