Which water sample is colourless?

Which water sample is suitable for drinking and why ?

Which water sample of your collection is basic in nature ?

Which indicator is colourless in acids ?

A metallic carbide on treatment with water gives a colourless gas which burns readily in air and gives a precipitate with ammoniacal silver nitrate solution. The gas evolved

Calcium oxide dissolves in water producing colourless solution. How do you test the nature of solution?

Which of the following pairs of ions are colourless?

A hard water sample contains calcium chloride only degree of hardness with 200 ppm. Calculate the weight of calcium chloride present in 10 kg of water sample.

A hard water sample contains dissolved Mg(HCO_3)_2 only. If degree of hardness of that sample is 150ppm, calculate the weight of Mg(HCO_3)_2 present in 1kg of water sample.

A hard water sample contains magnesium bicarbonate only. 100 ml of the hard water sample requires 10 ml. of standard soap solution (1 ml soap solution = 1 mg CaCO_3 ) to get good lather. Find out of the weight of Ca(OH_2) to be added to 10 Kg water sample to make it soft water.

pH of a water sample is tested with