Fill in the following blanks with suitable words:
(a) The process of burning of a hydrocarbon in the presence of air to give CO2, H20, heat and light is known as ............
(b) The sodium salt of a long chain fatty acid is called .........
(c) ............ is better than soap for washing clothes when the water is hard.
(d) The organic acid present in vinegar is.............
(a) Combustion (b) Soap (c) Detergent (d) Ethanoic acid
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