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>In the isothermal compression of a gas there is work done on the system to decrease the volume and increase the PRESSURE. Doing work on the gas increases the internal ENERGY and will tend to increase the TEMPERATURE. To MAINTAIN the constant temperature energy MUST leave the system as heat and enter the environment.

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》Potentiometric titrations are EXPERIMENTS used for studying REDOX titrations. In a chemical EXPERIMENT, the quinhydrone electrode is a kind of a redox electrode which is used for MEASURING the pH or the hydrogen ion concentration of a solution.

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NaCl+H2O+CO2+NH3=>NaHCO3+NH4Cl

Heya !!!!

a balanced chemical EQUATION is chemical equation in which the number of atoms present in reactant side must be EQUAL to number of atom pergent in product SITE.


▶ to follow the law of conservation of mass chemical reaction must be balanced.



▶ according to law of conservation of energy or mass
mass neither be CREATED nor be destroyed in a chemical reaction.



▶ according to law of conservation of mass:-

energy is neither created nor destroyed in a chemical reaction.

▶ atom present in reactants side should be equal to the product side.


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2.2*6.022*10^23/44
3.011*10^22

At room temperature (25°C), water is a LIQUID because it has the following characteristics of liquid:


(i) At room temperature, water has no shape but has a fixed VOLUME i.e., it occupies the shape of the CONTAINER in which it is kept.

(ii) At room temperature, water flows EASILY.

When u pass a BEAM of light from the colloidal solution its particle BECOMES visible
In this WAY u can test WHETHER a solution is colloidal or not

It will TURN RED LITMUS to BLUE

When an INCENSE stick is LIGHTED in one CORNER , it spread easily , because of the property of DIFFUSION ,

Sodium is an ALKALI metal and is very soft and can cut through knife as they have weak intermolecular attraction leading weak metallic atom-atom bonding while IRON is a transition metal which is very hard and REQUIRES GREAT energy to break apart.

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3Na of aluminium
0.0143 NA of IRON

Because it CATCHES FIRE EASILY

This is KEY to UR question
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Hey.

Here is the answer.

Potassium .

Here is what happens during electrolysis: POSITIVELY charged ions MIGRATE to the NEGATIVE ELECTRODE (cathode) during electrolysis. They gain ELECTRONS and are reduced.

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2AgNO3 + CU = Cu(NO3) 2 +2 AG

In SCIENCE and engineering, the weight of an object is related to the amount of FORCE acting on the object, either due to GRAVITY or to a reaction force that HOLDS it in place. 
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Lemon , ORANGE , milk , VINEGAR ETC contain ACIDS which are organic COMPOUNDS.

This is because of the FACT that PHASE TRANSITION OCCURS at same TEMPERATURE.  

The element must be easily converted to volatile COMPOUND with AVAILABLE reagent.
2)furthur it should DECOMPOSE easily for recovery of original element.

ex:NI+4CO-->Ni(CO)4.
NI(CO)4-->Ni+4CO.

So accoaccording to INCREASING order of force of attraction between the particles of WATER SUGAR and OXYGEN it comes that first oxygen, then water and then sugar......

Practically SURFACE tension is the property of water to contract itself and form a thin layer..
meachanically it is FORCE PER unit lenth.
suface tension decreases with tempreture.so u can get the taste of HOT things or liquids in ur mouth as they spread throughout

A) A SOLID non metal of valency 3 is phosphorus whose atomic no. is 15
b) A gas of valency 2 is OXYGEN whose atomic no. is 8.
C)A metal of valency 1 is POTASSIUM whose atomic no. is 19
D) A solid non metal of valency 3 is is Phosphorus whose atomic no. is 15.



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Due to Sublimation. NAPHTHALENE BALLS when kept in cupboards over a period of TIME SUBLIME into their gaseous state and evaporate into thin air.

The type of force in which threre is a use of animal power is called muscular force

ex-pushing of cart

the force which is exerted by the earth GRAVITY or atmosphere is called gravitational force

ex-dropping of STONE

the type of force in which there is a contact between 2 surface is MECHANICAL force

ex-dropping of stone to break a pot

the force exerted by electricity is called ELECTRO force.ex-running of fan by swithing on.

the force exerted by MAGNET is called magnetic force

ex-attraction between magnets

Photosynthesis is oxidation- REDUCTION reaction as the WATER ( LOOSE electrons) is being oxidized and CARBON dioxide( gains electrons) is being reduced...

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<> Ethanol:-

Ethanol's chemical formula is C2H5OH. Pure ethanol is a flammable, colorless liquid with a boiling POINT of 78.5° C. Its low melting point of -114.5° C allows it to be used in antifreeze products. It has a pleasant odor reminiscent of whiskey. Its density is 789 g/l about 20% less than that of water.

✓ chemical properties:-
Chemical Formula

*Ethanol’s chemical formula is C2H5OH.

*Ethanol is a 2-carbon alcohol.

*Its molecular formula is CH3CH2OH.

*An alternative notation is CH3–CH2–OH, which indicates that the carbon of a methyl group (CH3–) is attached to the carbon of a methylene group (–CH2–), which is attached to the oxygen of a hydroxyl group (–OH).

*It is a constitutional isomer of dimethyl ether. Ethanol is sometimes abbreviated as EtOH, using the common organic chemistry notation of representing the ethyl group (C2H5-) with Et.

*Reaction with SODIUM bicarbonate

*Acetic acid reacts with sodium bicarbonate to produce carbon dioxide.

<> Ethanoic acid:-

There are few better examples of improvements in the manufacture of chemicals in recent years than that of ethanoic acid (acetic acid). Up to the last few years much was manufactured by the non-catalytic oxidation of naphtha which gave large quantities of side-products. It is now usually manufactured from methanol with yields of over 99%.

✓ Chemical properties:-

* Acidic character

* When dissolved in water, acetic acid undergoes dissociation to form hydrogen (H+) ion. Because of the release of a proton, acetic acid has an acidic character.

*It turns blue litmus paper red, indicating that it is acidic in nature. However, it is a weak acid because it does not dissociate completely in aqueous solution.

<> plaster of Paris:-

A white powdery slightly hydrated calcium sulfate CaSO4·¹/₂H2O or 2CaSO4·H2O made by calcining gypsum and used chiefly for casts and molds in the form of a quick-setting paste with water.

✓properties:-

Firstly the Chemical formula of Gypsum is 2CaSO4.2H2O.

A paste is made by mixing Plaster of Paris with appropriate amount of water, which sets hard.

It has a property of setting into hard mass when water is added into it, within half an hour. The setting of plaster of Paris is due to its hydration to form crystals of gypsum which set to form hard and solid mass.

<> washing soda:- Sodium carbonate, Na₂CO₃, is the water-soluble sodium salt of carbonic acid. It most COMMONLY occurs as a crystalline decahydrate, which readily effloresces to form a white POWDER, the monohydrate.

✓ properties:- It is a crystalline solid which is white in color.

It exists as a monohydrated salt anhydrous salt heptahydrous salt and decahydrate salt

Sodium carbonate is basic in nature.

It has a melting point of 851°C.


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It MAY be d) so2
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38 ATP are PRODUCED from one MOLECULE of GLUCOSE during aerobic cellular RESPIRATION

It's LACTIC ACID ..
....

The Sun shines because it is able to convert energy from gravity into light. How does it do this? Imagine being at the center of the Sun. A huge amount of massis above you, squeezing down on you from all sides. This is what happens to thehydrogen gas in the core of the Sun. It gets squeeze together so tightly that four hydrogen nuclei combine to form onehelium atom. This is called nuclear fusion. In the process some of the mass of the hydrogen atoms is converted into energy in the form of light.


The same process occurs in thermonuclear (fusion) bombs. In the Sun the process occurs in a controled manner. In a bomb it happens all at once in a big chain-reaction explosion. The picture above is the fireball created by the largest thermonuclear bomb ever exploded by the United States. It was TREMENDOUSLY destructive producing a crater over a mile wide (6510 ft) and 250 ft deep. In the Sun's core the same amount of energy as 15 billion of these bombs is produced each second. The Sun doesn't blow to pieces because of the tremendous weight of the gas above. It just exactly balances the pressure from all the energy produced. If the fusion rate would GO down so that less energy was produced in the Sun's core, then gravity would cause the Sun to start COLLAPSING. This would in TURN squeeze the hydrogen atoms closer together until the amount of fusion went up by just enough to produce the energy needed to hold it up again. If the fusion rate in the Sun's core GOES up to much, then the pressure makes the Sun expand a little so that the hydrogen isn't quite so closely packed. The right balance is again reached when the weight from the mass above the core exactly balances the pressure from all the energy being produced.

Answer:

In most part of INDIA pure nylon or polyster clothes are not worn Why? Accepted Answer: The climate of India is described as hot and HUMID, hence in most parts of India nylon and polyester clothes are not worn because they have less air spaces in them and they do not ABSORB sweat.

In methane MOLECULE the four SP3 hybrid ORBITALS of each carbon atom OVERLAPS axially and separately with 1s ORBIT of four hydrogen atom .

1.every drop counts
2.thousands have live without LOVE,but not one without WATER
3.one drop could save our THIRSTY world
4.you don't know water's true worth until it is gone

Hey DEAR



here is your answer



By doing ONE activity it's prove that air contains water vapour


√ Just TAKE a cold glass of water and place it for a while.


√ You will se drop of water OUTSIDE the glass


√ As the water vapour in the air strike the cold glass they loose their kinetic energy


√ They condense water at the outer surface


√ in which we can see the vapour in the air



hope it helps


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To make chemical EQUATION more informative the reactants products should be equal .the AVAGADRO number ALSO used.the physical properties also should be there
the balanced equation is must and ATOMIC weight is necessary. Hope this may HELP u