Electrical Conductivity of Liquids

Q.

Why Hydrogen ions cannot exist alone?

Q.

The positive ion is called ______ and the negative ion is called __________.

Q. Why the potatoes acquire green spot on one side when we make electricity is pass through?

Q.

In case of a fire, before the firemen use the water hoses, they shut off the main electrical supply for the area. Explain why they do this.

Q. Distilled water is a poor conductor of electricity because_________.

1. it contains only acids
2. it contains only minerals
3. it is free of salts and minerals
4. it has excessive salts and minerals

Q. Which of the following liquids are bad conductors of electricity?

1. Drinking water
2. Lemon juice
3. Vegetable oil
4. Distilled water

Q.

What type of water that is used in medicine and inverter batteries.

Q.

Which of the following liquids is a good conductor of electricity?

1. Distilled Water

2. Lemon juice

3. Sugar solution

4. None of these.

Q.

Which of the following ions has the least flocculation value?

1. ${\mathrm{Cl}}^{-}$

2. ${\mathrm{SO}}_4^{2-}$

3. ${\mathrm{PO}}_4^{3-}$

4. $[\mathrm{Fe}{\left(\mathrm{CN}\right)}_6{]}^{4-}$

Q. Dilute hydrochloric acid conducts electricity.

1. True
2. False

Q. Metals conduct electricity better than liquids.

1. True
2. False

Q. In electrolytic solutions, ________ is the carrier of electric charge.

1. ion
2. proton
3. neutron
4. electron

Q.

What is meant by the chemical effect of electricity?

Q.

Many liquids that conduct electricity are solutions of _________.

1. acids

2. bases

3. salts

4. acids, bases or salts

Q. Electrical conductivity of distilled water can be increased by adding salt to it.

1. True
2. False

Q. Which of the following when added to distilled water can increase its electrical conductivity?

1. Lemon juice
2. Copper sulphate
3. Vegetable oil
4. Sugar

Q.

How are cations formed?

Q. Why distilled water does not conduct electricity?

Q. Calculate the maximum normality of a solution containing 13.4 g of sodium oxalate in 100ml solution.

Q.

What are ions give some examples?

Q.

The positive ion is called_____ and the negative ion is called_____.

Q.

Define simple ions.

Q. Why is salt added to tap water during electrolysis?

1. To decrease conductivity.
2. To increase conductivity.
3. To increase temperature.
4. To decrease temperature.

Q. Which of the following statement(s) is/are correct?
Statement 1: The liquid that conducts electricity is a solution of acids, bases/ salts and water.
Statement 2: When electric current passes through an electrolyte, chemical changes take place.

1. Statement 1 only.
   
2. Statement 2 only.
   
3. Both statements are correct.
4. Both statements are incorrect.
   

Q. Which of the following electrolyte will help the bulb glow?

1. Kerosene
2. Sugar solution
3. Distilled water
4. Sodium chloride

Q. The electrical conductivity of sea water is that of drinking water.

1. same as
2. more than
3. less than

Q.

Name the following.

The positively charged ions

Q.

What are cations and anions? Give an example of each.

Q. Which of the following is not an after effect to a current passing through a conducting liquid?

1. Colour of the solution may change.
2. Bubbles can be seen near the electrodes.
3. Electrolyte solidifies to form a concentrate.
4. Temperature of the solution may increase.

Q. Which of the following effects can be produced by electricity?

1. Heating effect
2. Magnetic effect
3. Chemical effect
4. All of the above