Question

1. Most nonmetals react with oxygen to form--------------- oxides 2. Most metals react with water to produce------------- gas 3. Nonmetals do not react with------------ 4. The brown flaky substance present on iron object is ------------ 5. Silver objects become black due to their reaction with atmospheric--------- 6. The reactivity series of metals is a list of common metals arranged in the-------------order of reactivity 7. ------------is the process of coating iron with zinc to prevent rusting 8. ------------ is used in the powdered form as a lubricant for machine parts. 9. ------------is used in making matchsticks and fireworks. 10 . ------------is an alloy of iron used for making building materials nails and screws 11 . ------------is used in car batteries pigments and paints 12 . ------------can be used as a nonpolluting fuel 13. Liquid ----------is used for refrigerating cells for medical research 14. A non-metal that is good conductor of heat---------- 15. ------------is kept immersed in kerosene​

Answer 1

Answer: 1. 3 oxides

Explanation:

haia

Answer 2

During a process, the zeolite bed was exhausted after 10.5 hours and

During a process, the zeolite bed was exhausted after 10.5 hours and 425 litres of 0.6 N sodium chloride solution was required to restart the function of the zeolite process. Work out the hardness of hard water in ppm. litres of 0.6 N sodium chloride solution was required to restart the function of the zeolite process. Work out the hardness of hard water in ppm.