Q43 of 312 Page 263

What is the advantage of detergents over soaps for washing clothes? Also state One disadvantage.

Advantage: Detergents can be used even with hard water and have strong cleansing action whereas soaps cannot work effectively in hard water.

Disadvantage: Detergents are non-biodegradable, hence cause water pollution.



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43 What happens when ethanoic acid reacts with sodium hydroxide? Write equation of the reaction involved. 43 What happens when vegetable oils are hydrogenated? Name the catalyst used. 44 An organic compound X of molecular formula C2H4O2 gives brisk effervescence with sodium hydrogencarbonate. Give the name and formula of X. 44 A mixture of ethyne (acetylene) and oxygen is burnt for welding. Can you tell why a mixture of ethyne and air is not used?