Question

AT nswer: (d) Formation of bubbles of a colourless and odourless gas. 2. A student requires hard water for an experiment in his laboratory which is not available in the neighbouring area. In the laboratory there are some salts, which when dissolved in distilled water can convert it into hard water. Select from the following groups of salts, a group, each salt of which when dissolved in distilled water will make it hard.
(a) Sodium chloride, potassium chloride (b) Sodium sulphate, potassium sulphate (c) Sodium sulphate, calcium sulphate
(d) Calcium sulphate, calcium chloride reason of the answer also​

Answer 1

Green green yellow yellow green green yellow yellow white white black black red red

Answer 2

Answer:

sodium sulphate potassium sulphate

Explanation:

please mark me brainliest answer