CURIOUSITY QUIZ: CHEMICAL EFFECTS OF ELECTRIC CURRENT

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Test Your knowledge on 'Chemical Effects of Electric Current' prepared exclusively according to the NCERT science curriculum for Class-8 . Attempt all the questions by clicking on the right option. Submit the completed Form by clicking the 'Submit' button at the end of the Form. Get your Score and the correct Answer by clicking the 'View score' button. Good Luck!

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When we pass electricity to a solution of Copper Sulphate using two electrodes immersed in it, over which electrode metallic Copper is deposited?

1 point

Little after Sunrise and little after Noon respectively.

Little before Sunrise and little before Noon respectively.

Negative electrode ( Cathode)

Little before midnight and little after mid-day respectively.

Clear selection

Coating of which metal is generally deposited over Iron to prevent it from corrosion and rusting?

1 point

They have two thick layers of fur around their body.

They have a layer of fat ( blubber) under their skin.

Their ears and tails are small to prevent the loss of body heat.

Zinc

Clear selection

Which is the only liquid metal that conducts electricity ?

1 point

To search for foods in a flock.

To fight collectively against their enemies.

To lay their eggs in a mass nesting .

Mercury

Clear selection

Who first observed that electric current passing through a conducting wire produces magnetic field?

1 point

They have two thick layers of fur around their bodies.

They have a layer of fat under their skins.

They perch together to keep themselves warm.

Hans Christian Oersted

Clear selection

It glows like a bulb; but it is not actually a bulb. It is a diode. Can you name it ?

1 point

It has a thick layer of fur around its body.

LED

Its oily skin acts like an insulation layer for preventing the loss of body heat .

Its ears and fins are small to prevent the loss of body heat.

Clear selection

When electric current is passed through water with two electrodes immersed in it , what gas is evolved at the electrode connected to the negative terminal of the battery ?

1 point

The Western Ghats and the Central Himalayas

The Eastern Ghats and the North-east

Hydrogen

The Western Ghats and the Andamans

Clear selection

When electric current is passed through water with two electrodes immersed in it , what gas is evolved at the electrode connected to the positive terminal of the battery ?

1 point

Deciduous forests

Temperate grasslands

Oxygen

The Himalayan slopes

Clear selection

The element of an electric heater becomes hot when electric current is passed through it. Of which metal the heating element of the heater is made of ?

1 point

It has strong claws to grasp the tree branches that helps it climb trees.

It has hook like structures on its feet to help it climb trees.

Nichrome

It has a rough body surface as well as slender and sturdy legs to help it easily climb trees.

Clear selection

The filament of an electric bulb becomes hot and starts glowing when electric current is passed through it. Of which metal the filament of the bulb is made of ?

1 point

Its long tail helps it to jump from branch to branch without falling down.

Its long tail helps it to threaten the enemies.

Its long tail helps it to maintain its body balance during jumping from one branch to the other.

Tungsten

Clear selection

These are the electronic switches provided to the household electrical supply that automatically turns off when the current in the circuit exceeds a safe limit ?

1 point

Their long beaks help them to fight with their enemies more efficiently.

Miniature Circuit Breaker (MCB)

Their long beaks help them to easily catch worms hiding deep inside the tree holes.

Their long beaks help them to regulate the body temperature.

Clear selection

What are the substances that conduct electricity in their solutions?

1 point

Spider Monkey

Howler monkey

Acid, Base and Salt

Golden Langur

Clear selection

A metal, less expensive and less reactive than Iron, is used to be deposited over iron made cans and containers used for strung food in order to prevent rusting ?

1 point

The large ears help the elephants to listen to the sounds of other members of the herd clearly.

The elephants move their large ears frequently to keep away the insects.

They swing their large ears like fans to keep themselves cool in the hot and humid climate of the rainforests.

Tin

Clear selection

When the insulation of a conducting wire is somehow damaged due to wear and tear, a high current may flow along a low resistant path producing lot of heating and damage to the electrical installation. What is this situation called ?

1 point

Cellulose

Starch

Short Circuit

Proteins

Clear selection

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