Some fruits and vegetables also conduct electricity. It is explained with the following example

(i) Cut a potato into two halves.
(ii) Insert the copper wires of a tester into it.
(iii) Keep it for an hour.
(iv)There appears a greenish blue spot on the potato around the wire.
(v) It is because the current produces a chemical effect on potato.
(vi) Hence, it is clear that vegetables conduct electricity

LEDs are light Emitting Diodes. They are used to check electric current. Even when a weak electric current flows through it, it glows. These are available in many colours such as red, green, yellow, blue and white. LED has two wires, one is longer and the other is shorter. Larger wire is connected with +ve terminal and -ve to the shorter terminal.

The ordinary water we get from the tap, river, lakes and ponds is not as pure as distilled water. It contains so many impurities in the form of the salts. These impurities make it good conductor of electricity. As distilled water is free from salt, it is unable to conduct electricity.

Liquid A is better conductor of electricity because it can pass the electricity very easily due to which bulb glows very brightly.

An electric current through a conducting solution causes chemical reactions. e.g., bubbles of a gas may be formed on the electrodes. Change of colour of solutions may occur. The reaction would depend on which solution and electrodes are used. 

Due to the heating effect of current, the filament of the bulb gets heated to a high temperature and it starts glowing. However, if the current passing through a circuit is too weak, the filament does not get heated sufficiently and it does not glow.

No, for deposition of metal, we require electrodes of desired size, while undersized particles cannot be used as electrodes.

She will observe the gas bubbles.

In electric cell, chemical energy is converted into electrical energy.

Distilled water is not a good conductor of electricity but adding common salt make it conducting.

Electroplating is most common industrial application of chemical effects of electric current.

No, distilled water does not conduct electricity.

LED is a device or bulb which even glows at low or small current.

Tap water, salt solution.

Acids, bases and salts.

Electroplating is done on the iron to prevent it from rust and corrosion and it is cheap.

As sea water contains more salt which increases conductivity. So, sea water is a good conductor of electricity.

Due to the presence of various salt solution in fruits and vegetables, they are able to conduct electricity to some extent.

The place where the waste electrolytes should be disposed far away from residential areas.

Solution hydroxide or caustic soda is produced by the electrolysis of an aqueous solution (water solution) of sodium chloride.

The electric current produces the magnetic field under which a current carrying wire behaves like a magnet.

For checking whether the given liquids conduct electricity or not, we can use tester.

Three liquids which can conduct electricity are.
(i) Tap water
(ii) Lemon juice (citric acid)
(iii) Vinegar (acetic acid).

As per the question, solution B is a better conductor.

The distilled water does not conduct the electricity.

When a compass needle is brought near a current carrying wire, then needle deflects.

Heating effect of electric current is responsible for the bulb to glow in an electric circuit.

The three effects of electric current are
(i) Heating effect of current
(ii) Magnetic effect of current
(iii) Chemical effect of current.

The sugar solution in distilled water will make it a good conductor of electricity and current can easily pass through it.

The bulb does not glow because the current through it is too weak.

Acids, bases and salts are those substances which when added to the liquids make them good conductors of electricity.

During the electrolysis of water, hydrogen gas is evolved at the cathode.

Since, no chemical changes take place when electricity is allowed to pass through the solids while in liquids chemical changes take place when electricity is pass through it.

Layer of zinc is coated over iron because zinc prevents it from rust and corrosion.

Since, wet hand acts as good conductor. So, we feel electric shock when we touch electrical appliance with wet hands.