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Henry's law states that the solubility of a gas in a liquid is directly proportional to the pressure of the gas. Further mole fraction of the gas in a solution is proportional to the partial pressure of the gas.Partial pressure of the gas in solution= KH x mole fraction of gas in solutionorwhere KH is Henry's law constant.(i) To increase the solubility of CO2 in soft drinks and soda water, the bottle is sealed under high pressure.(ii) At high altitudes, the partial pressure of oxygen is less than that at the ground level because the atmospheric pressure is less. Low blood oxygen causes anoxia.

When 2 grams of a gas A is introduced in an evacuated flask kept at 25 C; the pressure was found to be 1 atm .i.e.Partial Pressure of gas A = 1 atm.And let moles be nA = 2/Maif 3 g of another gas B is then added to the same flask;Partial Pressure of gas B =1.5 atm – 1 atm. = 0.5 atmmoles of gas B = 3/MbAgain the temp and volume are constant therfore,P1/n1 = P2/n2hence,1/(2/Ma) = 0.5/(2/Mb)Ma/2 = 0.5Mb/2Ma/2 = Mb/4Ma = Mb/2orMa/Mb = ½ => 1:2

Osmotic pressure is an important factor affecting cells.Osmoregulationis thehomeostasismechanism of an organism to reach balance in osmotic pressure.

Osmotic pressure is the basis of filtering ("reverse osmosis"), a process commonly used inwater purification.

Polythene bags have harmful effects to the environment. They non-biodegradable and cause environmental pollution. They undergo a process known as photo degradation, in which they break down into smaller and smaller toxic particles.They are bad for wildlife. Plastic bags can choke or poison fish, animals and birds, with marine wildlife particularly vulnerable. Plastic bags tend to disrupt the environment in a serious way. They get into soil and slowly release toxic chemicals. They eventually break down into the soil, with the unfortunate result being that animals eat them and often choke and die.

Polythene bags have harmful effects to the environment. They non-biodegradable and cause environmental pollution. They undergo a process known as photo degradation, in which they break down into smaller and smaller toxic particles.They are bad for wildlife. Plastic bags can choke or poison fish, animals and birds, with marine wildlife particularly vulnerable. Plastic bags tend to disrupt the environment in a serious way. They get into soil and slowly release toxic chemicals. They eventually break down into the soil, with the unfortunate result being that animals eat them and often choke and die.

TheMannich reactionis anorganic reactionwhich consists of anamino alkylationof an acidic proton placed next to acarbonylfunctional groupbyformaldehydeand a primary or secondaryamineorammonia. The final product is a β-amino-carbonyl compound also known as aMannich base.Reactions betweenaldiminesand α-methylene carbonyls are also considered Mannich reactions because these imines form between amines and aldehydes. The reaction is named afterchemistCarl Mannich.

Solid

In solids, particles are tightly or closely packed.The gaps between the particles are tiny and hence it is tough to compress them.Solid has a fixed shape and volume.Due to its rigid nature, particles in solid can only vibrate about their mean position and cannot move.Force of attraction between particles is adamant.The rate of diffusion in solids is very low.An example of solids: solid ice, sugar, rock, wood, etc.

Liquid

In a liquid, particles are less tightly packed as compared to solids.Liquids take the shape of the container in which they are kept.Liquids are difficult to compress as particles have less space between them to move.Liquids have fixed volume but no fixed shape.The rate of diffusion in liquids is higher than that of solids.Force of attraction between the particles is weak than solids.Example of liquids: water, milk, blood, coffee, etc.

Gas

In gases, particles are far apart from each other.Force of attraction between the particles is negligible and they can move freely.Gases have neither a fixed volume nor a fixed shape.The gaseous state has the highest compressibility as compared to solids and rate is diffusion is higher than solids and liquids.The kinetic energy of particles is higher than solids and liquids.An example of gases: air,helium, nitrogen, oxygen, carbon dioxide, etc.

A galvanized substance is that which has been coated with a layer of zinc to delay corrosion.It does this by the zinc getting corroded itself,instead of the substance.

thanku very much

Glass wool is an insulating material made from fibres of glass arranged using a binder into a texture similar to wool.Natural sand and recycled glass are mixed and heated to 1,450 °C, to produce glass. The fiberglass is usually produced by a method similar to making cotton candy, by forcing it through a fine mesh by centripetal force, cooling on contact with the air. Cohesion and mechanical strength are obtained by the presence of a binder that “cements” the fibers together. A drop of binder is placed at each fiber intersection. The fiber mat is then heated to around 200 °C to polymerize the resin and is calendered to give it strength and stability. Finally, the wool mat is cut and packed in rolls or panels, palletized, and stored for use.

Batts are precut, whereas blankets are available in continuous rolls. Compressing the material reduces its effectiveness. Cutting it to accommodate electrical boxes and other obstructions allows air a free path to cross through the wall cavity. One can install batts in two layers across an unfinished attic floor, perpendicular to each other, for increased effectiveness at preventing heat bridging. Blankets can cover joists and studs as well as the space between them. Batts can be challenging and unpleasant to hang under floors between joists; straps, or staple cloth or wire mesh across joists, can hold it up.

Gaps between batts (bypasses) can become sites of air infiltration or condensation (both of which reduce the effectiveness of the insulation) and requires strict attention during the installation. By the same token careful weatherization and installation of vapour barriers is required to ensure that the batts perform optimally. Air infiltration can be also reduced by adding a layer of cellulose loose-fill on top of the material.

Glass wool is made from silica sand to which recycled glass (cullet) and fluxing agents are added. The material is melted to 1100°C in an electric furnace and then conditioned in a gasfired forehearth. The fibre is formed by centrifugation through drilled circular baskets, where after, binding products and elements specific to the usage are added. No CFC`s or HCFC`s are produced in the production process. The fibres are gathered in a mat form in a collection chamber and then conveyed to an oven where it is cured under controlled conditions to the required thickness and density.

Once complete the product is then packaged in roll or batt form, and our patented process means that thanks to glass wool`s elastic properties, it can be compressed by a factor of up to 10 which saves on storage and reduces transport costs.

Glass wool insulation products are manufactured to be applied in multiple areas of buildings. Glass wool is most commonly known for insulation in ceilings of residential buildings, but we also offer products for the following applications:Cavity wall and dry wall insulation HVAC and Air-conditioning system insulations Pipe insulation Over purlin roof insulation in commercial buildings Suspended ceilings Industrial roof insulation Higher temperature insulations High performance sound proofing

Because of the salty seawater, the metal sheets of ships rust and corrode. Paints contain metals such as zinc and magnesium. This prevents the metal surface of the ship in coming in direct contact with the salty seawater. Therefore, ships are painted at frequent intervals.

Poly Vinyl Chloride(PVC)

How many electronin1 kg? The answer is 1.0977693108051E+30. We assume you are converting betweenelectronandkilogram. You can view more details on each measurement unit:electronorkgThe SI base unit for mass is thekilogram.1 electronis equal to 9.109382E-31kilogram.

sugarcane has taproots

1. Scientists classify organisms in order to study and include each organism along with its identification and habitat. It establishes the relationship among different organisms and helps to know about their evolution.It provides information about plants and animals, which occur in specific geographical regions.

2 (i) Variation in sizeThe bacteria are so small in size that they cannot be seen without observing under microscope. On the other hand, blue whale and red wood trees of California are such a giant living structures.

(ii) Variation in lifespanThe insects like fruit flies live for few hours while some trees-like pine live for several years.

(iii) Variations in body coloursSome living things are colourless, such as worms, whereas birds, insects, flowers are colourful.

3 states of matter and examples are the following:

solid- ice,woodliquid- water,kerosenegas- oxygen, hydrogen

The three states of matter include solids, liquids and gases. Examples include sand, water and air respectively.Matter can change from one state to another if heated or cooled. If ice (a solid) is heated it changes to water (a liquid). This change is called MELTING. If water is heated, it changes to steam (a gas).

The main function of the lungs is the process of gas exchange called respiration (or breathing). In respiration, oxygen from incoming air enters the blood, and carbon dioxide, a waste gas from the metabolism,leavesthe blood. A reduced lung function means that the ability of lungs to exchange gases is reduced.

Due to the presence of atmosphere life is possible on the eartha protective layer called ozone layer also makes it possible

b is more sutaible because this show resonce perfectlyCH2-CH-CH-O+

With increase in pressure the particles gets compressed.

Narendra is and is the first thing I want to

Wurtz Reaction

a)2-Methylbut-2-ene

Benzene is a planar molecule having delocalized electrons above and below the plane of ring. Hence, it is electron-rich. As a result, it is highly attractive to electron deficient species i.e., electrophiles. ... Therefore, it undergoes electrophilic substitution reactions very easily.

Ans :- An addition reaction, in organic chemistry, is in its simplest terms an organic reaction where two or more molecules combine to form a larger one. Addition reactions are limited to chemical compounds that have multiple bonds, such as molecules with carbon–carbon double bonds, or with triple bonds.

The process by which the unsaturated gain hydrogen's and become saturated hydrocarbons is know as addition reaction.you can easily memorize it.the word addition states the adding oh hydrogen atoms to unsaturated hydrocarbons which have double or triple bond,gets hydrogen and turns to saturated ones.

use of this process:vegetable oils which have long unsaturated hydrocarbons are much healthier than the animal fats which are saturated ones.

In many industries,they use this process known ashydrogenation.this is where the unsaturated carbons are changed to saturated ones with the help of catalysts( it is a substance that wont affect the chemical reaction but make a path for the reaction to take place ) that help the saturated carbons gain hydrogen and transfer it to saturated ones.

SO here option C is rightincreasing pressure will reverse reaction for equiliburium

AB mass of A = 2 g mass of B = 5 g hence if mass of A = 1g , mass of B = 5/2 g =2.5inAB2 mass of A = 2g and mass of B= 10g , hence for 1 g A , mass of b = 10/2g =5in A2B , mass of A = 4g , mass of B= 5g ,

hence for 1 g A , mass of B = 5/4g = 1.25in A2B3 , mass of A = 4 g , mass of B= 15 g , hence for 1 g A mass of B = 15/ 4 g =3.75

therefore ratio ofmass of B in all componds with the same amount of A =2: 4 : 1: 3, which is awhole no. ratio hence law of multiple proportion.

Law of multiple proportions, statement that when two elements combine with each other to form more than one compound, the weights of one element that combine with a fixed weight of the other are in a ratio of small whole numbers.

The pressure exerted by an ideal gas is numerically equal to two-third of the mean kinetic energy of translation per unit volume of the gas

The answer is energy per unit volume

Given, Reaction:

XeO6(4-) (aq) + 2F– (aq) + 6H+(aq)→XeO3(g) + F2(g) + 3H2O(l)

In this reaction, we can conclude that the ON of Xe decreases from + 8 of XeO6(4-) to form + 6 of XeO3.

The ON of F also increases from -1 of F- to form 0 in F2.

So, we can say that Na4XeO6 is stronger oxidizing agent as compared to F.

thanks

You have given initial [NH3]. If [NH3] remaining = 1 mole/L, then 1mole/L reacted 2NH3(g) N2(g)+3H2(g)

So change in concentration of NH3 = -1 mole/L.

This means that because 2 mole NH3 make 1 mole of N2, the change in [N2] will +0.5mol/L and that for H2 will be +1.5mol/L.

Equilibrium concentration of NH3 will be 1 mole/LPlug into Keq= [N2][H2}^3/[NH3]^2 and find Keq=(1.5^3)(0.5) = 1.687 nearly equal to 1.7

2NH3 = N2 + 3H2

Initial mole= 2 0 0

Final Mole = 1 1/2 3/2

Equilibrium constant = 3/2*3/2*3/2*1/2= 27/16 ans

Answer of 90th is 2

A is right answer is question

the answer is 2-methyl-butanal

2-methyl - butanal is the answer

option. 4 is correct

option 2 is the correct answer

option b) 1-methyl cyclohex-2-ene

the answer is 6-methyl 3-octanol

answer is 2. 6-metyl-3 octonol

Weight of liquid = 148 – 50 =98 g

Volume of liquid = 98/0.98 = 100 ml = volume of vessel it means, vessel of 100 ml contain ideal gas at 760 mm Hg at 300 K

Weight of gas = 50.5 - 50 = 0.5g

Using, PV = nRT = w/m RT

760/760 * 100/1000 = 0.5/m * 0.082 *300 [n = 0.5/m]

∴ Molecular weight of gas (m) =123

why did you divide 760 by 760

Diborane structure has four terminal and two bridging hydrogen atoms. The simple Boron Hydride is Diborane B2H6. The structure can be explained as, electrons are required for the formation of conventional covalent bond structure, whereas in Diborane there are only 12 valence electrons, three from each Boron atoms. Thus B2H6 is an electron deficient component.

The four terminal hydrogen atoms and two boron atoms lie one plane. Above and below this plane, there are two bridging hydrogen atoms. Each Boron atom forms four bonds eventhough it has only three electrons. The terminal B-H bonds are regular bonds but the bridge B-H bonds are different. Each bridge hydrogen is bonded to the two boron atoms only by sharing of two electrons. Such covalent bond is called three centre electron pair bond or a multicentre bond or banana bond

It is a colorless gas at room temperature with a repulsively sweet odor. Diborane mixes well with air, easily forming explosive mixtures. Diborane will ignite spontaneously in moist air at room temperature. Synonyms include boroethane, boron hydride, and diboron hexahydride.

i. Protiumii. Tritiumiii.Deutrium

(i) Helium - Zero group(ii) Horizontal row - Period

Explanation:Helium belongs to the Noble gas and is placed in the zero group.In a periodic table horizontal rows are called periods and vertical columns are called groups.

option D is correct..

S has 6 electrons , so 4 will make bond with F and 1 pair will be there as lone pair

similarly Xe had 8 elections , so 4 will make bond and 2 will be there as lone pair.

it's answer is B as we cannot decide spin of clockwise and anticlockwiseif one is clockwise then other is anticlockwise

tq

why can't the answer be c?

in C option directions are given as respectively but we cannot take it exactly that

tq

option (b) is correct.