Balbharati solutions for Science and Technology [English] 9 Standard Maharashtra State Board chapter 5 - Acids, Bases and Salts [Latest edition]

Identify the odd one out and justify.

Identify the odd one out and justify.

Identify the odd one out and justify.

Identify the odd one out and justify.

Identify the odd one out and justify.

Identify the odd one out and justify.

Identify the odd one out and justify.

Identify the odd one out and justify.

Write down the changes that will be seen in the instance and explain the reason behind them. 

50ml water is added to 50ml solution of copper sulphate.

Write down the changes that will be seen in the instance and explain the reason behind them. 

Two drops of the indicator phenolphthalein were added to a 10ml solution of sodium hydroxide.

Write down the changes that will be seen in the instance and explain the reason behind them. 

Two or three filings of copper were added to 10ml dilute nitric acid and stirred.

Write down the changes that will be seen in the instance and explain the reason behind them. 

A litmus paper was dropped into 2ml dilute HCl. Then 2ml concentrated NaOH was added to it and stirred.

Write down the changes that will be seen in the instance and explain the reason behind them.

Magnesium oxide was added to dilute HCl and magnesium oxide was added to dilute NaOH.

Write down the changes that will be seen in the instance and explain the reason behind them.

Zinc oxide was added to dilute HCl and zinc oxide was added to dilute NaOH. 

Write down the changes that will be seen in the instance and explain the reason behind them. 

Dilute HCl was added to the limestone.

Write down the changes that will be seen in each instance and explain the reason behind them. 

Pieces of blue vitriol were heated in a test tube. On cooling, water was added to it.

Write down the changes that will be seen in each instance and explain the reason behind them. 

Dilute H₂SO₄ was taken in an electrolytic cell and an electric current was passed through it.

Classify the following oxides into three types and name the types.

CaO, MgO, CO₂, SO₃, Na₂O, ZnO, Al₂O₃, Fe₂O₃

Explain by drawing a figure of the electronic configuration. 

Formation of sodium chloride from sodium and chlorine. 

Explain by drawing a figure of the electronic configuration. 

Formation of magnesium chloride from magnesium and chlorine.

Show the dissociation of the following compound on dissolving in water, with the help of a chemical equation and write whether the proportion of dissociation is small or large.

Hydrochloric acid

Show the dissociation of the following compound on dissolving in water, with the help of a chemical equation and write whether the proportion of dissociation is small or large. 

Sodium chloride

Show the dissociation of the following compound on dissolving in water, with the help of a chemical equation and write whether the proportion of dissociation is small or large. 

Potassium hydroxide

Show the dissociation of the following compound on dissolving in water, with the help of a chemical equation and write whether the proportion of dissociation is small or large. 

Ammonia

Show the dissociation of the following compound on dissolving in water, with the help of a chemical equation and write whether the proportion of dissociation is small or large. 

Acetic acid

Show the dissociation of the following compound on dissolving in water, with the help of a chemical equation and write whether the proportion of dissociation is small or large. 

Magnesium chloride

Show the dissociation of the following compound on dissolving in water, with the help of chemical equation and write whether the proportion of dissociation is small or large. 

Copper sulphate

Write down the concentration of the following solution in g/L and mol/L.

7.3g HCl in 100ml solution

Write down the concentration of the following solution in g/L and mol/L.

2 g NaOH in 50 ml solution

Write down the concentration of the following solution in g/L and mol/L. 

3g CH₃COOH in 100ml solution

Write down the concentration of the following solution in g/L and mol/L. 

4.9 g H₂SO₄ in 200ml solution

Classify the acids according to their basicity and give one example of each type.

What is meant by neutralization?

Give two examples from everyday life of the neutralization reaction.

Explain what is meant by electrolysis of water. Write the electrode reactions and explain them. 

Write the chemical equation for the following activity. 

NaOH solution was added to HCl solution.

Write the chemical equation for the following activity.

Zinc dust was added to dilute H₂SO₄. 

Write the chemical equation for the following activity.

Dilute nitric acid was added to calcium oxide.

Write the chemical equation for the following activity.

Carbon dioxide gas was passed through the KOH solution.

Write the chemical equation for the following activity.

Dilute HCl was poured on baking soda.

State the differences between acids and bases.

State the difference.

Cation and anion 

State the difference.

Negative electrode and positive electrode.

Classify aqueous solutions of the following substances according to their pH into three groups: 7, more than 7, and less than 7.

Common salt, sodium acetate, hydrochloric acid, carbon dioxide, potassium bromide, calcium hydroxide, ammonium chloride, vinegar, sodium carbonate, ammonia, and sulphur dioxide.

Obtain a sample of rainwater. Add to it a few drops of universal indicator. Measure its pH. Describe the nature of the sample of rainwater and explain the effect it has on the living world.