26. The pH values less than 7 on the pH scale represent an _________ solution.
27. The pH value increases from 7 to 14 is ________.
28. pH value of a solution above ‘7’ represents a ________ solution.
29. The pH scale is from _______.
30. When pH of rain water is less than 5.6, it is called __________.
31. Tooth decay starts when the pH of the mouth is lower than _______.
32. To get rid of indigestion pain, people use bases called __________.
33. _________ neutralize the excess acid in the stomach.
34. _____________ (milk of magnesia), a mild base, is often used for neutralize purpose.
35. The colour of methyl orange indicator in acidic medium is _______.
36. The colour of Phenopthaline indicator in basic solution is _________.
37. The colour of methyl orange indicator in basic solution is ________.
38. The colour of phenopthaline indicator in acidic solution is __________.
39. pH paper is called ______________.
40. Sodium chloride is also known as __________ or ____________.
41. These deposits of large crystals are often brown due to impurities. This is called ________.
42. The aquous solution of sodium chloride is called _______ solutions.
43. We get NaOH from NaCl by passing of electricity.The process is called the ___________ process. Because of the products formed chlor for chlorine and alkali for sodium hydroxide.
44. The chlorine gas is used for the manufacture of __________ powder.
45._____________ is used for bleaching cotton and linen in the textile industry for bleaching wood pulp in paper industry and for bleaching washed clothes in laundry.
46. Baking soda is sometimes added for ___________ cooking.
47. Baking soda is a mild ___________ base.
48. Sodium hydrogen carbonate is an ingredient in __________.
49. Sodium hydrogen carbonate is is also used in soda-acid _______________.
50. Chemical formula for hydrated copper sulphate is _________.
51. Calcium sulphate hemihydrates (CaSO4.½ H2O) is called _____________.
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