Would you be able to check if water is hard by using a detergent

Detergents are ammonium or sulphonate salts of long chain carboxylic acids. Unlike soap, they do not react with calcium and magnesium ions present in hard water to form scum. They give a good amount of lather irrespective of whether the water is hard or soft. This means that detergents can be used in both soft and hard water. Therefore, it cannot be used to check whether the water is hard or not.

Answer Detergents are ammonium or sulphonate salts of long chain carboxylic acids. Unlike soap, they do not react with calcium and magnesium ions present in hard water to form scum. Detergent produces a good amount of lather irrespective of whether the water is hard or soft. This means that detergents can be used in both soft and hard water. Therefore, it cannot be used to check whether the water is hard or not. Recently Viewed Questions of Class 10 Science • Q:- What are the necessary conditions for autotrophic nutrition and what are its by-products? • Q:- The device used for producing electric current is called a (a) generator. (b) galvanometer. (c) ammeter. (d) motor. • Q:- Outline a project which aims to find the dominant coat colour in dogs. • Q:- A solar water heater cannot be used to get hot water on (a) a sunny day. (b) a cloudy day. (c) a hot day.(d) a windy day. • Q:- An electric motor takes 5 A from a 220 V line. Determine the power of the motor and the energy consumed in 2 h. • Q:- Write an equation to show the reaction between Plaster of Paris and water. • Q:- Calculate the number of electrons constituting one coulomb of charge. • Q:- Consider a circular loop of wire lying in the plane of the table. Let the current pass through the loop clockwise. Apply the right-hand rule to find out the direction of the magnetic field inside and outside the loop. • Q:- Explain the following in terms of gain or loss of oxygen with two examples each. (a) Oxidation (b) Reductio...

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