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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 seawater is called





8. The chemical name of water is





9. The alternate name for zeolite method is





10. The formula of cation exchange resin is





11. Insoluble impurities that stick firmly to inner walls of boiler tubes are called





12. Insoluble impurities that remain suspended in boiler water are called





13. Used for internal treatment of scales in boiler





14. Prevention of ______ is most obligatory because it causes soil infertility and air pollution





15. Sewage treatment can be done by





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





17. Chemicals used to separate suspended impurities in seawater are





18. Water used in boiler is usually made soft by method





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





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