Answer the following questions:
Classify aqueous solutions of the following substances according to their pH into three groups: 7, more than 7, less than 7.
Common salt, sodium acetae, hydrochloric acid, carbon dioxide, potassium bromide, calcium hydroxide, ammonium chloride, vinegar, sodium carbonate, ammonium, sulphur dioxide.

Answer the following questions: Show the dissociation of the following compounds on dissolvinf in water, with the help of chemical equation and write whether the proportion of dissociation is small or large. Hydrochloric acid, sodium chloride, potassium hydroxide, ammonia, acetic acid, magnesium chloride, copper sulphate.

Use your brain power Classify the following salts into the types acidic, basic and neutral, sodium sulphate, potassium chloride, ammonium nitrate, sodium carbonate, sodium acetate, sodium chloride.

Answer the following question : Classify the following into elements, compounds and mixtures : Sugar, sodium, nitrogen, sodium carbonate, air, sulphuric acid, mercury, stainless steel, cement, potassium dichromate.

Write the chemical formulae of the following compounds : Calcium carbonate, Sodium bicarbonate, Silver chloride, Calcium hydroxide, Magnesium oxide, Ammonium phosphate, Cuprous bromide, Copper sulphate, Potassium nitrate, Sodium dichromate

The monthly maximum temperature of a city is given in degree celcius in the following data. By taking suitable classes, prepare the grouped frequency distribution table 29.2, 29.0, 28.1, 28.5, 32.9, 29.2, 34.2, 36.8, 32.0,31.0, 30.5, 30.0, 33, 32.5, 35.5, 34.0, 32.9, 31.5, 30.3,31.4, 30.3, 34.7, 35.0, 32.5, 33.5, 29.0, 29.5, 29.9, 33.2, 30.2 From the table,answer the following questions. For how many days the maximum temperature was less than 34@