just i want the answers

a) methyl orange b) phenolphthalcin c)sulphuric scid d) phosphoric acid c)starch 11. For the determination of the number of water molecules, Is any indicator used? a)Yes b) No. 12. Which instrument is used for measuring conductivity of a solution? a) conductivity meter ablissolved oxygen meler c)pll meter d)spectrophotometer 13. For determination of residual chlorine, which indicator is used? a) methyl orange b)phenolphthalein c)sulphuric acid d) phosphoric acid e)starch 14. For determination of temporary, permanent and total hardness, what is the titration method used? a) acid base b) redox c)precipitation d) complexometric 15.For the experiment to determine the strength of potassium permanganate, the titration method is a)complexometric b) lodometric c) Iodimetric d)redos 16. Which of the follosing experiments conducted in your lab is an example of complexometric titration? a)estimation of hardness in water sample b) dissolved oxygen c)estimation of potassium permanganave strength d)estimation of residual chlorine 17. In an acidic medium, methyl orange is atred b) blue c)ercen dyyellow 18. Pemanent hardness can be removed by a) diltration 5)boiling c)coaggatation d) none of the above 19. Which instrument is used for measuring pH of a solution? a) conductivity meter b)dissolved oxygen meter. c) pH meter d)spectropholometer 20. For the estimation residual chlorine in a water sample, which titration method is ased? a)complexonctric b) lodometric c) iodimetric d) redox