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a, Mark:20 Science Question Paper, 8pm- 9pm, , 1 to 5=1 mark, , 1.Name the scientist who identified the, Hydrogen gas for the first time?, 2.Write any two names of strong acid, used in the laboratory?, , 3.Which gas is produced when metals, igre (elm i1eair=\e1e fia, , 4.Write any two names of Alkalies used, in the laboratories?, , 5.Which Alkali is used in soap, manufacturing?, , 5-10=3 mark, , 6.Explain Indicators? Give 2 example, for natural indicators., , 7 What is neutralisation? Why lime is, added to soil?, , 8.Explain pH paper, , OAV AVaromswr-\el (elisa, , 10.Write down the uses of Acids, , ae ie pee eT er TC ona eT