FRANK Solutions for Class 9 Chemistry Chapter 11 - Practical Work
Chapter 11 - Practical Work Exercise 170
(b) Cu(NO3)2 = blue
(c) CuSO4.5H2O = blue
(d) CuSO4 = pale green
(e) K2Cr2O7 = orange
(f) PbS = black
(a) NH3 and Cl2
(b) CO2 and SO2
(c) H2S and SO2
(d) H2 and O2
(a) Hard water and soft water
(b) Temporary hardness and permanent hardness
(c) Soaps and detergents
(b) Give a chemical test to distinguish between Na2S and Na2Co3.
(c) How will you perform a flame test for sodium?
(a) Copper carbonate
(b) Washing soda
(c) Lead nitrate
(d) Ammonium chloride
(a) The gas with ______ smell is hydrogen sulphide.
(b) Smell of sulphur dioxide is like that of ______.
(c) A gas with irritating odour is ______.
(d) ______ turns red litmus paper blue.
(e) The formula of lime water is ______.
(f) The ______ colour is imparted to flame by potassium.
(g) The calcium imparts ______ colour to the flame.
(b) Burning sulphur
(c) Nitrogen dioxide
For ex: factories
Non point sources of water pollution: sources of water pollution that remain scattered and don't have specific locations for the discharge of pollutants into particular water bodies are called as non point sources of water pollution.
For ex: run off from fields.
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