general-knowledge-general-science Related Question Answers

1. Chemical formula for water is





2. The gas usually filled in the electric bulb is





3. Washing soda is the common name for





4. Quartz crystals normally used in quartz clocks etc. is chemically





5. Which of the gas is not known as green house gas?





6. Bromine is a





7. The hardest substance available on earth is





8. The variety of coal in which the deposit contains recognisable traces of the original plant material is





9. Tetraethyl lead is used as





10. Which of the following is used as a lubricant?





11. The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing, is





12. The gases used in different types of welding would include





13. The property of a substance to absorb moisture from the air on exposure is called





14. In which of the following activities silicon carbide is used?





15. The average salinity of sea water is





16. When an iron nail gets rusted, iron oxide is formed





17. Galvanised iron sheets have a coating of





18. Among the various allotropes of carbon,





19. The group of metals Fe, Co, Ni may best called as





20. Heavy water is





21. The chemical (ethyl mercaptan) added to the otherwise odourless LPG cooking gas for imparting a detectable smell to the gas is a compound of





22. The element common to all acids is





23. Non stick cooking utensils are coated with





24. Monazite is an ore of





25. Carbon, diamond and graphite are together called





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