Halogens MCQs

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1. . The elements of VII A of modern periodic table are called:





2. . The word ______ is made from Greek words “halos” and “genn”:





3. . ______ means the salt former or salt givers:





4. . In the following, the elements have 7 electrons in their outermost shell:





5. . In the following groups all elements have a strong irritating smell:





6. . In laboratory, which one of the following is produced by the reaction of hydrochloric acid with concentrated sulphuric acid:





7. . During production of chlorine from brine, the electrolysis cell used is:





8. . Rays that are more powerful than X-rays are:





9. . During the production of chlorine by electrolysis of brine, the other product besides chlorine is:





10. . Chlorine gas is heavier than air:





11. . Chlorine on reaction with caustic soda produces salt, water, and:





12. . Chlorine on reaction with carbon monoxide produces a toxic gas:





13. . The chlorine chain reactions occur in the presence of:





14. . The brown colored halogen gas is:





15. . ______ is used in the production of cloth and medicine:





16. . Which one of the following gases is used to remove germs from water?





17. . Which one is used for the production of Aqua Regia:





18. . Which one of the following will produce white fumes with moist air:





19. . An element different from the other elements in the following:





20. . Which element in the following is isotopic:





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