Halogens - 5

Chemistry Class 10
1. Excess chlorine reacts with hot and concentrated solution of alkali to give ________ and chlorides.


Chemistry Class 10
2. The formula of chloroform is ________.


Chemistry Class 10
3. Phosgene gas is produced by the reaction of chlorine with ________.


Chemistry Class 10
4. Iodized table salt is obtained by mixing _______% potassium iodide by weight in common salt.


Chemistry Class 10
5. Hydrogen chloride gas has a ________ taste.


Chemistry Class 10
6. Hydrochloric acid reacts with metal bicarbonates to produce ________ gas.


Chemistry Class 10
7. ________ is used to remove scales and rust from metal surfaces.


Chemistry Class 10
8. The chemical name of bleaching power is _______.


Chemistry Class 10
9. Bleaching powder is prepared in the laboratory by mixing ________ with chlorine.


Chemistry Class 10
10. The colour of bleaching powder is ________.


Chemistry Class 10
11. The formula of calcium hypochlorite is _________.


Chemistry Class 10
12. Bleaching powder reacts with hydrogen peroxide to give ________ gas.


Chemistry Class 10
13. Halide ions can be identified by the formation of precipitates with ________ solution.


Chemistry Class 10
14. Chlorine is prepared in the laboratory by the action of ________ and hydrochloric acid.


Chemistry Class 10
15. The colour of silver iodide is ________.


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