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Naveen Sharma 8 years, 3 months ago

The calorific value or heat of combustion or heating value of a sample of fuel is defined as the amount of heat evolved when a unit weight ( or volume in the case of a sample of gaseous fuels ) of the fuel is completely burnt and the products of combustion cooled to a standard temperature of 15 degree
 The Calforic value of kerosene is 35,000 kJ/kg

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Dharmik Rathi 8 years, 3 months ago

Order of reactiveness:- 1) Pottasium 2) Sodium 3) Zinc 4) Iron 5) Copper

Siddhant Suwalka 8 years, 3 months ago

Íŕöń

Aradhya Singh 8 years, 3 months ago

Potassium

Janhvi Dwivedi 8 years, 3 months ago

Sodium

Mansi Rawat 8 years, 3 months ago

Is this zinc or not?
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Aryan Pandey 8 years, 3 months ago

Search for it on wikipedia. You will get a better explanation.
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Manu Gouda 8 years, 3 months ago

Liquid ???

Siddhant Suwalka 8 years, 3 months ago

Gas

Dev Nanda 8 years, 3 months ago

solid

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Mansi Rawat 8 years, 3 months ago

A fossil fuel is formed when dead remains of organisms buried under the earth millions of years ago.

Syamala Devi Nukella 8 years, 3 months ago

A fuel (such as coal, oil, or natural gas) formed in the earth from plant or animal remains.

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Mansi Rawat 8 years, 3 months ago

A substance that undergoes combustion is called combustible or fuel . e.g. wood,coal,etc.
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Sonam Bali 8 years, 3 months ago

 A hydrocarbon deposit, such as petroleum, coal, or natural gas, derived from the accumulated remains of ancient plants and animals and used as fuel

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Aryan Pandey 8 years, 3 months ago

Electric current
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Charvi Jaiswal 8 years, 3 months ago

Cation: when an atom loses electrons it becomes positively charged ion positively charged ion is called cation Anion when an atom gains electrons it becomes negatively charged negatively charged ions anion

Charvi Jaiswal 8 years, 3 months ago

Do you mean cations and anions
Wha
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Ipsit Swaroop Bose 8 years, 3 months ago

Wha means what?
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Tejas Patil 8 years, 3 months ago

The dotted structure in rough endoplasmic reticulum is known as ribosomes
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Honey Ch 8 years, 3 months ago

A push or pull exerted by an object on another object is known as force.

Tejas Patil 8 years, 3 months ago

As per the book, A push or a pull is known as force
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Aryan Pandey 8 years, 3 months ago

Invention means to create something that is not found or discovered before.
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Amar Kumar 8 years, 3 months ago

An organism whose cells contain a nucleus surrounded by a membrane and whose DNA is bound together by proteins into chromosomes are called Eukaryotic cells.These are the type of living cells that form the organisms of all of the life kingdoms except monera. Protista, fungi, plants and animals are all composed of eukaryotic cells. Examples of eukaryotic cells include plant cells and animal cells.

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Abc Abc 8 years, 3 months ago

Pressure increases with increase in depth
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Aryan Pandey 8 years, 3 months ago

In case of animals it is about 80 million.
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Tejas Patil 8 years, 3 months ago

The ringing sound made by metals are called sonorous. All metals are sonorous but non-metals are not sonorous
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Amar Kumar 8 years, 3 months ago

Teflon is a tough synthetic resin made by polymerizing tetrafluoroethylene.  It is  used to coat non-stick cooking utensils and to make seal.Teflon is very durable but will burn off the temperatures is too high.

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Honey Ch 8 years, 3 months ago

The source book , which keeps a record of all endangered animals and plants.
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Ansh Rathod 8 years, 3 months ago

DNA..... Deoxyri nucleic acid

Honey Ch 8 years, 3 months ago

The full form of DNA is Deoxyribo nucleic acid
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Amar Kumar 8 years, 3 months ago

Good agricultural practice (GAP) are specific methods which, when applied to agriculture, create food for consumers or further processing that is safe and wholesome.

Agriculture practices are simply practices used in agriculture to facilitate farming. Examples may be the best way to clear this up. Plowing the soil is an agriculture practice, as is no till, minimum tillage, free range raising of poultry, pigs and cattle. Organic farming is an agriculture practice as well as sustainable agriculture.

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Amar Kumar 8 years, 3 months ago

Synthetic fibers :Fibres that are made by human beings are called synthetic fibres. Rayon and acetate are both artificial fibers, but not truly synthetic, being made from wood. Nylon is synthetic fiber.

Priyansit Kar 8 years, 3 months ago

Fibres made by man in laboratories with the help of chemicals are called synthetic fibres
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Amar Kumar 8 years, 3 months ago

Physical properties of metals:-

Shiny (lustrous)

Good conductors of electricity and heat.

High density.

High melting point.

Malleable and sonorous 

Ductile and so can be drawn into wires.

Solid at room temperature except for mercury. 

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