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This is the market wherein the trading of securities is done. Secondary market consists of both equity as well as debt markets.

We will observe the formation of pure NaClsolid pricipitationfrom the solution.The principle behind this phenomenon is LeChatelier'sprinciple.When you have a saturated NaCl solution you have the equilibrium:NaCl(s) <=> Na+(aq) + Cl-(aq)When you add more Cl-to the already saturated solution, the equilibrium must shift to the left to undo the change which results in forming more NaCl(s). When your solution contains no solid phase and all of the NaCl is present as ions in solution then you are able to produce very pure NaCl(s) by bubbling HCl(g) into the saturated solution of NaCl.

PbI2 (s) <=> Pb2+ (aq) + 2 I- (aq) and the equilibrium condition is given by Ksp = [Pb2+][I-]^2

at equilibrium [Pb2+]= 1.5 x 10^-3 M [I-]= 2 x 1.5 x 10^-3=3.0 x 10^-3 M

Ksp = 1.5 x 10^-3 ( 3.0 x 10^-3)^2 =1.4 x 10^-8

it might be 2M but not for sure..

Solubilityis the property of asolid,liquidorgaseouschemical substancecalledsoluteto dissolve in a solid, liquid or gaseoussolvent. The solubility of a substance fundamentally depends on the physical and chemical properties of the solute and solvent as well as on temperature, pressure and presence of other chemicals (including changes to thepH) of the solution. The extent of the solubility of a substance in a specific solvent is measured as thesaturationconcentration, where adding more solute does not increase the concentration of the solution and begins to precipitate the excess amount of solute.

Concentration cells can be electrode concentration cells or electrolyte concentration cells.

Electrolyte Concentration cell- In this type of cell electrodes in both the half cells are made up of same substances and electrolyte is the solution of same substances but with different concentration.

Electrode Concentration cell- In this type of cell two electrodes of same substance but with different concentration are dipped in same solution.

working:

A concentration cell generates electricity from the reduction in thethermodynamic free energyof the electrochemical system as the difference in the chemical concentrations in the two half-cells is reduced. The same reaction occurs in the half-cells but in opposite directions, increasing the lower and decreasing the higher concentration. The energy is generated from thermal energy that the cell absorbs as heat, as the electricity flows. This generation of electricity from ambientthermal energy, without atemperature gradient, is possible because the convergence of the chemical concentrations in the two half-cells increases entropy, and this increase more than compensates for the entropy decrease when heat is converted into electrical energy.

Solubility product constantis simplified equilibriumconstant(Ksp)definedfor equilibrium between a solids and its respective ions in a solution.

given the concentration of HCL = 5M

so , no of moles of HCL = 5*0.2 = 1mol

now, when 3 litres of water are added.. then total volume will be 3+0.2 = 3.2L

so , new concentration = mol/vol = 1/3.2 = 0.3125M

wow

Preparation of dinitrogen:

Nitrogen is obtained commercially by liquefaction and fractionaldistillationof air. This process mainly involves two steps:

Step 1: Air is reduced to liquid air by applying high pressure ranging between 100 to 200 atmospheres.This compressed air is then passed through fine jet where it undergoes expansion.This method is repeated several times which results in the formation of liquid air.

Step 2: The liquid formed undergoes fractional distillation.The boiling point of dinitrogen is lower than that of the liquid oxygen and hence it distils out, leaving behind liquid oxygen. Nitrogen is obtained from the impure liquid.

Nitrogengas has complete octet for both the atoms and it isunreactivedue to the prsence of strong triple bond.On the other hand phosphorous has bonds with unstable angle strainscomparedto that ofnitrogendue to which it burns quickly,hence easily reacts.

Phosphorusoccurs in at least 10 allotropic forms, the most common (andreactive) of which is so-called white (or yellow)phosphoruswhich looks like a waxy solid or plastic. It is veryreactiveand will spontaneously inflame in air so it is stored under water.

Answer

Mass of the nitrogen = 1.4 g

Molar mass of nitrogen = 28 g mol–1

Therefore amount of nitrogen = 1.4 / 28 = 0.05 mol

Number of nitrogen molecule in 0.05 mol

= 6.023 x 1023 x 0.05

= 3.0115 x 1022

Also number of electrons in one molecule of nitrogen = 14

Therefore, total number of electrons in 1.4 g of nitrogen

= 3.0115 x 1022x 14

= 4.22 x 1023

The excessive use of ploythenes causes damage to the environment in the following ways:

The polythenes when are burnt as a waste they release poisonous gases into the atmosphere which degrades the environment

Polythene wraps mixed with biodegradable wastes inhibit the activity by the microorganisms thus slowing the time period of the degradation of the waste..

They clog the drains leaving water log in many areas during rain…

Stray animals like cows sometimes eat these polythene wrapped with the food lying on the road side: this site is common where cleaning measures are not proper…

Polythenes are non bio degradable thus they need to be burned or dumped in a land pit to get them rid of the environment

Tc=Tk-273.15a)293-273.15=19.85 Cb)470-273.15=196.85C

Polished surfaces are poor radiators of heat. So loss of heat on that account is reduced and the electric iron remains hotter than otherwise.

waxis ester of alcohol and fatty acids.

No fixed position could be assigned to hydrogen in the Periodic Table.

Isotopes discovered long after Mendeléev periodic classification ofelements imparted a challenge to Mendeleev’s Periodic Law.

The atomic masses of elements did not increase in a steady manner while going from one element to other which made it difficult to predict the number of elements that could be discovered between two elements.

No fixed position could be assigned to hydrogen in the Periodic Table.

Isotopes discovered long after Mendeléev periodic classification ofelements imparted a challenge to Mendeleev’s Periodic Law.

The atomic masses of elements did not increase in a steady manner while going from one element to other which made it difficult to predict the number of elements that could be discovered between two elements.

poem kha h complete question hi nhi h

poet is the speaker in the poem but it's depend on poem

there is no poem appearing...........

poem Nahi h ..........poem batao.......

speaker is the poet it is the correct answer

The speaker is the voice or "persona" of a poem. One should not assume that the poet is the speaker, because the poet may be writing from a perspective entirely different from his own, even with the voice of another gender, race or species, or even of a material object.

Thespeakeris the voice or "persona" of apoem. One should not assume that thepoetis thespeaker, because thepoetmay be writing from a perspective entirely different from his own, even with the voice of another gender, race or species, or even of a material object.

Thespeakeris the voice or "persona" of apoem. One should not assume that thepoetis thespeaker, because thepoetmay be writing from a perspective entirely different from his own, even with the voice of another gender, race or species, or even of a material object.

persona is the right answer

poet is the speaker in the poem

the speaker of the poem is poet

24 gm of Magnesium contains=N atoms. Where N=6.023 x 10^24

48 gm of Magnesium 48 gm of Mg contains=2 N atoms.

1 Atom of Mg contains=12 electrons

Mg 2+ ion will contain=12–2=10 electrons

2N Mg-ions will contain

= 10 x 2N electrons

=10 x 2 x 6.022 x 10^23

=1.2044 x 10^25 electrons

When ( white ) Silver chloride is exposed to sunlight,it produces (black metallic coloured) Silver along with evolution of Chlorine gas.2AgCl --------> 2Ag + Cl2This is a photodecomposition reaction.

Thedissociation degreeis the fraction of original solute molecules that havedissociated. It is usually indicated by the Greek symbol α. More accurately,degreeofdissociationrefers to the amount of solutedissociatedinto ions or radicals per mole.

In the presence of sulphuric acid (H2SO4), KI produces HI

2KI + H2SO4→ 2KHSO4 + 2HI

Since H2SO4is an oxidizing agent, it oxidizes HI (produced in the reaction to I2).

2HI + H2SO4 → I2 + SO2 + H2O

As a result, the reaction between alcohol and HI to produce alkyl iodide cannot occur. Therefore, sulphuric acid is not used during the reaction of alcohols with KI. Instead, a non-oxidizing acid such as H3PO4is used.

the difference between these both is that 2H means two atoms of hydrogen while H2 means the molecular formula of hydrogen composed of 2 atoms

ccl4 will be involved as its a Reimer tiemer reactionthanks

CHO-CH2- CH=CH-CHO iska IUPAC name: - pent-2-en-1, 5 di al

Answer is the [ D ]

The melting point of a substance is the temperature at which it changes state from solid to liquid.

MalleableThis means that metalscanbe beateninto thin sheets.

malleability and second is ductilty

Hardness:Non-metals are not hard rather they are generally soft. But diamond is exception; it is most hard naturally occurring substance.

State:Non-metals may be solid, liquid or gas.

Lustre:Non-metals have dull appearance. Diamond and iodine are exceptions.

Sonority:Non-metals are not sonorous, i.e. they do not produce a typical sound no being hit.

Conduction:Non-metals are bad conductor of heat and electricity. Graphite which is allotrope of carbon is good conductor of electricity, and is an exception.

Malleability and ductility:Non-metals are brittle.

Melting and boiling point:Non-metals have generally low melting and boiling points.

Difference between metals and non-metals

The metals are generally present in the solid form at room temperature except mercury which is liquid at room temperature. Whereas non-metals may be solid, liquid and gaseous at room temperature.

Metals are good conductors of heat and electricity but non-metals are poor conductors of heat and electricity.

Metals are ductile in nature i.e. it can be drawn into thin wires. But non-metals are not ductile.

Metals are malleable but non-metals are not malleable. Malleable means the property through which metals can be hammered into thin sheets.

Metals are lustrous i.e. having shinning appearance but non-metals are dull in appearance.

Metals contain 1 to 3 electrons in their outermost shell whereas non-metals contain 4 to 8 electrons in their outermost shell.

Metal loses electrons to form electropositive ions but non-metals accept electrons to form electronegative ions.

Metals have low ionization enthalpy and non-metals have high ionization enthalpy.

Metals react with oxygen to form basic oxides whereas non-metals usually react with oxygen to form acidic oxides.

Metals are good reducing agent as it loses electrons easily from its valance shell. But non-metals are good oxidizing agent as it accepts electrons in its outermost shell.

Metals are sonorous in nature i.e. produces sound when hit by an object. but non-metals does not produces any sound.