Water MCQs

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1. . The ratio of water on our planet as compared to dry land is





2. . The percentage of hydrogen to oxygen in water is





3. . The bond angle between H–O–H is





4. . The most and readily soluble gas in water is





5. . The water used in the boiler is





6. . 1 PPM is equal to mg/L





7. . The isolation of salts from the sea water is called





8. . The chemical name of water is





9. . The alternate name for the zeolite method is





10. . The formula of cation exchange resin is





11. . The insoluble impurities that stick firmly to the inner walls of the boiler tubes is called





12. . The insoluble impurities that remain suspended in the inner walls of the boiler tubes and do not settle down are called





13. . Used for the internal treatment of scales in boiler





14. . Prevention of ______ is most obligatory because it is directly responsible for soil infertility and indirectly for air pollution





15. . The sewage treatment can be done by the following methods





16. . To make seawater fit for domestic use it is made pure by the following steps





17. . Certain coagulating chemicals are used to separate suspended impurities in the sea water like





18. . The water used in the boiler is usually made soft by the method





19. . For the treatment of sewage water a huge amount of ______ is required





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