2.Water containing which of the following substances may conduct electricity

3.Why does the bulb glow when the electric current passes through it

THERE ARE 2 WIRES CALLED LEADS ATTACHED TO THE LED.One lead is slightly longer than the other.

5.Does the compass needle show deflection for lemon juice

6.Does the compass needle show deflection of tap water

7.Lemon juice is --------------conductor

8 .Milk is a -------------conductor.

Small amount of mineral salts present naturally in water are beneficial for human health .

10.The liquids that conduct electricity are solutions of acids,bases and salts in water

Which is a better conductor of electricity?

Which of these is used for detecting weak electric current passing through a liquid?

We can also detect weak electric current flowing through a liquid by using a

Distilled water does not conduct electricity

Distilled water becomes a good conductor of electricity on dissolving

The process of depositing a layer of any desired metal on another metal by means of electricity is called?

Properties of chromium include:

Tins cans used for storing food are made by

Iron is used in bridges and automobiles to provide strength, however, iron tends to corrode and rust, so a coating of _____ is deposited on iron to protect it from corrosion and formation of rust.

For electroplating an iron object with copper metal, a copper plate is made _______

Electroplating is based on ___________of an electric current.

Adding common salt to distilled water makes it

An electrolyte is

Flow of electrons is called

Tick the chemical effect of elecric current

Who discovered chemical effect of elecric current?

Boojho’s uncle has set up an electroplating factory near his village. He should dispose off the waste of the factory

Which one of the following solutions will not conduct electricity?

Which of the following solutions will not make the bulb in Fig 14.2 glow?

(a)

(b)

(c)

(d)

LED stands for

Sugar solution is a good conductor of electricity.

the phenomenon of decomposition of an electrolyte when electricity is passed through is known as

Electroplating prevents

Which of these is plated on the iron to prevent it from chemically reacting with food?

Out of the following, which metal is used to electroplate iron to make it shining and rust resistant?

Chromium corrodes easily.

Who discovered heating effect of elecric current?

Electroplating is based on ___________of an electric current.

Adding common salt to distilled water makes it

An electrolyte is

Flow of electrons is called

Electroplating prevents

Which of these is plated on the iron to prevent it from chemically reacting with food?

Out of the following, which metal is used to electroplate iron to make it shining and rust resistant?

Sugar solution is a good conductor of electricity.

Chromium corrodes easily.

Boojho’s uncle has set up an electroplating factory near his village.

He should dispose off the waste of the factory

Which of these will conduct electricity

Conduction of electricity in liquids occurs through electrons.

When a liquid conducts electricity, a process other than conduction also takes place. What process is this?

Electric current is the flow of particles with

Which of the following is not a conductor of electricity?

An electrolyte is a

On passing electricity through copper sulphate solution.

In which of these is current not conducted by electrons?

A battery is used as a driving force in an electric circuit. True or false?

which of these particles are responsible for the flow of electric current−electrons, protons or neutrons?

Sugar solution is a good conductor of electricity.

The electrode thats connected to the positive terminal of the battery is called a

Which of the following does not conduct electricity?

An electric current can produce

Pure or distilled water is a

Why do we add little dilute sulphuric acid to copper sulphate solution during electroplating?

Which of the following is a bad conductor of electricity?

Electroplating is based on ___________of an electric current.

Which of these is plated on the iron to prevent it from chemically reacting with food?

Electroplating prevents

Out of the following, which metal is used to electroplate iron to make it shining and rust resistant?

Alloys of metals

Tin cans used for storing food are made by electroplating

The filament of the bulb gets heated to a high temperature due to the

During electrolysis of water,

To electroplate silver on Copper jewellery, the electrolyte that can be used is:

Radhika wants to electroplate a plate with ZINC. She has a Zinc bar and the plate. But she does not know which should be the anode and which should be the cathode.

Small amount of a mineral salt present naturally in water makes it a______________ of electricity.

Flow of electron is called

conductors can allow electricity because of the presence of