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 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 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 are called





12. The insoluble impurities that remain suspended in the boiler water 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 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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