plz Answer me this she till question 5 i have completed
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6. on adding eater to acid and base,its ph will change
7. Sodium bicarbonate. NaHCo3
8. when it comes in contact with water it forms CuSo4. 5H2O which is blue in colour. Thus when anhydrous CuSo4 is put in a liquid contaning moisture it will turn blue. This is how anhydride mixture is used to detect moisturizer (water)
9. ph paper.also called litmus paper, is filter paper that is treated with natural water soluble dye from linches. pH paper is used as an indicator to teat the acidity of water based liquids.
10. The plaster of Paris should be stored in a moister proof container as it absorbs water from moisture and turns into hard substanse ( gypsum)
11. a) when common salt is sprinkled on ice slit, it starts melting because freezing point of water is lowered...it can lower the freezing point upto 55 degree Celsius
b) calcium chloride can be used in place of common salt. It can lower the freezing point upto 55 degree C
c) associated values are scientific knowledge caring, helping and supporting nature.
sorry mate my capacity of solving is till here only as I m from Maharashtra board I had a difficult time in solving CBSE sums
plz thank plz