Halogens - 5


1. Excess chlorine reacts with hot and concentrated solution of alkali to give ________ and chlorides.


2. The formula of chloroform is ________.


3. Phosgene gas is produced by the reaction of chlorine with ________.


4. Iodized table salt is obtained by mixing _______% potassium iodide by weight in common salt.


5. Hydrogen chloride gas has a ________ taste.


6. Hydrochloric acid reacts with metal bicarbonates to produce ________ gas.


7. ________ is used to remove scales and rust from metal surfaces.


8. The chemical name of bleaching power is _______.


9. Bleaching powder is prepared in the laboratory by mixing ________ with chlorine.


10. The colour of bleaching powder is ________.


11. The formula of calcium hypochlorite is _________.


12. Bleaching powder reacts with hydrogen peroxide to give ________ gas.


13. Halide ions can be identified by the formation of precipitates with ________ solution.


14. Chlorine is prepared in the laboratory by the action of ________ and hydrochloric acid.


15. The colour of silver iodide is ________.





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