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Fe(s) + CuSO₄(aq) → FeSO₄(aq) + Cu(s)
When an iron nail is dipped in copper sulphate solution, a brown coating of copper is formed on the surface of iron and the colour of copper sulphate solution changes from blue to light green. This reaction shows that iron is more reactive than copper as it displaces copper from its solution and iron passes into solution as Fe²⁺ ions and ferrous sulphate solution is formed. This reaction is a single displacement reaction.

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Why the app is not showing the complete solution of the chapter.it is showing update the app version 2.2.2 whereas the app is already upto date.

Posted by Shreya Sahu 7 years, 8 months ago

CBSE > Class 08 > Science

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Whyare consi

Posted by Mahavir Singh 7 years, 8 months ago

CBSE > Class 08 > Science

1 answers

Mahavir Singh 7 years, 8 months ago

Why are viruses considered as being at the borderline between living and non living things

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Uses of threshing machine

Posted by Ayushi Patel 7 years, 8 months ago

CBSE > Class 08 > Science

2 answers

Sadia Mujawar 7 years, 8 months ago

The time will be saved! Labours and etc

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Sanjeev Jain 7 years, 8 months ago

It is a machine employed to seprate inside seeds from its outer parts i.e. covering already present when seprated from its plant, such as stacks and husks.

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How the plastics harm the soil and organisms lived in it ?

Posted by Rakesh Kumar 7 years, 8 months ago

CBSE > Class 08 > Science

1 answers

Sanu Singh 7 years, 8 months ago

Because plastic is a non biodegradable material and cant be decomposed

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What is sugar ?

Posted by Rakesh Kumar 7 years, 8 months ago

CBSE > Class 08 > Science

1 answers

Sanjeev Jain 7 years, 8 months ago

Sugar is a carbohydrate which isbwidely used as a sweetening agent. It is also named as sucrose, a saccharide.

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Weedicide is used for removing weeds , if they sprinkled on crops, what would happen ?

Posted by Rakesh Kumar 7 years, 8 months ago

CBSE > Class 08 > Science

2 answers

Dikshant Goliyan 7 years, 8 months ago

Nothing just pollution of soil

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Someone The Best 7 years, 8 months ago

The crops didn't be harmed but the soil will be polluted

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What is the relation among multiplying of lactobacillus and conversion of curd ?

Posted by Rakesh Kumar 7 years, 8 months ago

CBSE > Class 08 > Science

1 answers

Yogita Ingle 7 years, 8 months ago

Milk is converted into curd or yogurt by the process of fermentation. Milk consists of globular proteins called casein. The curd forms because of the chemical reaction between the lactic acid bacteria and casein. During fermentation, the bacteria use enzymes to produce energy (ATP) from lactose. The byproduct of ATP production is lactic acid. Lactic acid acts on the globular proteins present in the milk and denatures them. This denaturation destroys the tertiary and quaternary structures of proteins and the globular proteins are converted into fibrous proteins thus giving a thick texture to the milk due to coagulation of the proteins.

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Relation between force and pressure

Posted by Tanay Saparia 7 years, 8 months ago

CBSE > Class 08 > Science

1 answers

Yogita Ingle 7 years, 8 months ago

The force applied on an object per unit is known as pressure.
Relation between Force and Pressure:
If the Force’ F’ is applied perpendicularly on a surface having area ‘A’ ,
then the force applied per area is = F/A
by the definition it is the pressure on that surface
so, pressure, P = Force(F)/Area(A)
P = F/A
Force = Pressure × Area

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What is the difference between gravitational force and force of gravity?

Posted by Naveen Sonwani 4 years, 7 months ago

CBSE > Class 08 > Science

1 answers

Sia ? 4 years, 7 months ago

Parameter	Gravitation	Gravity
Nature of force	It may be an attractive force or repulsive force as well.	It is always a kind of attractive force.
Universal force	It is considered as the universal force.	It is not considered as the universal force.
Direction	The direction of this gravitational force is along the radial direction from the masses.	The direction of this force is along the line joining the earth’s center and the center of the body. It is always working towards the center of the earth.
Effect of force	It is a very weak kind of force.	It is a strong kind of force.
Vector	This force is a vector physical quantity.	Gravity force is having its own vector field.
Need for mass	It needs objects with two masses	It needs only one mass.
Zero force effect	The force will be zero when the distance between bodies is infinity.	The force of gravity will be zero at the center of the earth.

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Give one application for lateral inversion produced by mirror reflection

Posted by Ashita Upadhyay 7 years, 8 months ago

CBSE > Class 08 > Science

1 answers

Rajdip Ganguly 4 years, 7 months ago

The letters of the front of an ambulance are written laterally inverted, so that the driver of the vehicle moving ahead of the ambulance reads the word laterally inverted in his rear-view mirror, and gives a way to the ambulance to pass first.

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Give reason A bacteria.protozoa, fungi are called microorganisms

Posted by Sakshi Garg 7 years, 8 months ago

CBSE > Class 08 > Science

1 answers

Rakesh Kumar 7 years, 8 months ago

Because we are unable to see them with our naked eyes.

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Name two acids and salt preservatives

Posted by Sumit B 7 years, 8 months ago

CBSE > Class 08 > Science

1 answers

Anurag Singh 7 years, 8 months ago

Sorbic acid, or 2,4-hexadienoic acid, is a natural organic compound used as a food preservative. It has the chemical formula CH3(CH)4CO2H. It is a colourless solid that is slightly soluble in water and sublimes readily. It was first isolated from the unripe berries of the Sorbus aucuparia (rowan tree), hence its name.

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What is a metal

Posted by Gaurav Kumar 7 years, 8 months ago

CBSE > Class 08 > Science

2 answers

Shweta Sharma 7 years, 8 months ago

A solid material which is lustrus mellable ducktile etc

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Anurag Singh 7 years, 8 months ago

a solid material which is typically hard, shiny, malleable, fusible, and ductile, with good electrical and thermal conductivity (e.g. iron, gold, silver, and aluminium, and alloys such as steel

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How the rice or paddy is grown in the feild

Posted by Pranjal Singh 7 years, 8 months ago

CBSE > Class 08 > Science