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Ans :- IUPAC nameMethoxyethane

Othernamesethyl methyl ether

When thecombis rubbed on adry cloth, it gets electrically charged. ... Initiallycombwas having neutral charge but when we rub acombwith dry hairit gets electrostatic charge. When we getpieces of papernear comb, it's electrostatic force created by negative charge oncomb,attracts them.

Sodium chloride NaCl is a neutralsalt so pH is 7.

In practical terms it is a measure of the acidityor alkalinity of thegrowing medium and as such indicates the availability of nutrients toplants. Most plants growbest in soils or soil-based media withpHvalues betweenpH5.5 and 6.5. Artificial mixes usually require a slightly more acidpHof 5.0 to 6.5.

Acetic acid, also known asethanoic acidor methanecarboxylicacid, is a colorless liquid with a strong and distinct pungent and sour smell. Its chemical formula is C2H4O2 or can be written as CH3COOH or CH3CO2H.

2-bromo-1-propanol

1-propyl benzeneIf no of carbons is more than 6 then consider ring as phenyl or take it as a parent benzene

New Imperialism characterizes a period of colonial expansion by European powers, the United States, and Japan during the late 19th and early 20th centuries. The period featured an unprecedented pursuit of overseas territorial acquisitions

this compound is symmetric about horizontal amd vertical axis..

so, all the H atoms , above middle line are exactly same as that of the below

similarly for right and left also..

so no. of H atoms at different positions are 4

so, option B

The following types of coal have been identified according to their physical properties:(i) Peat Coal(ii) Lignite Coal(iii) Bituminous Coal(iv) Anthracite Coal

Uses of Coal:(i) Coal as a source of steam energy(ii) As a source of electrical energy(iii) As a Domestic fuel(iv) Metallurgical coke

Evaporation causes cooling because the process requires heat energy. The energy is taken away by the molecules when they convert from liquid into gas, and this causes cooling on the original surface.

Atroom temperature(anywhere from zero degree centigrade to 100 degrees centigrade),wateris found in aliquidstate. This is because of the tiny, weak hydrogen bonds which, in their billions, holdwatermolecules together for small fractions of a second.Watermolecules are constantly on the move.

i)

thank you

I. isobutanecompounds having same molecular formula but different structural formulaii butane CH3- CH2- CH2- CH3

because of following laws of isomersI. parent chain should have most no. of carbon atomsii. branching cannot be done from first or last carbon atom(parent chain is the basic chain from which branching is to be done)

First two members of homologous series having functional group - Cl are :-

1. CH₃Cl - Chloromethane2. C₂H₅Cl - Chloroethane

ALDEHYDEHCHOCH3CHOCH3CH2CHOCH3CH2CH2CHO

CARBOXYLIC ACIDHCOOHCH3COOHCH3CH2COOHCH3CH2CH2COOH

2 nd member-C2H63 rd member-C3H8

Homologous series describes organic chemical compounds that have similar structure that only differ by the number of carbon and hydrogen atom that are contained in the main carbon chain.

Methane belongs to the homologous series known as alkanes and it is the simplest of the organic chemical compounds that are in this series.

The alkanes have a general formula ofCₐH₂ₐ₊₂ . Where 'a' represents the number of carbon atoms that are in each molecule of the alkane compound, and that are bonded by single bonds to each other and the hydrogen atoms.

You can use the formula CₐH₂ₐ₊₂ to find the second, third, fourth compound of this homologous series, and so on...

The second compound is: a = 2

Therefore CₐH₂ₐ₊₂ = C₂H₍₂ₓ₂₎₊₂ = C₂H₆(ethane)

The third compound will be: (where a = 3)

CₐH₂ₐ₊₂ = C₃H₍₂ₓ₃₎₊₂

= C₃H₈(propane)

Iodine (I2),naphthalene(C10H8, mothballs),ammonium chloride(NH4Cl) and dry ice (solidCO2) are some substances which sublimates NH4CL OR NaCL

Blue litmuspaper turnsredunder acidic conditionshence optiona

15. option A

16. option c

17. option c

The quality of water here is determined by making measurements or by taking samples of water and testing them foracidity(pH), color, dissolved oxygen andturbidity(a measure of the suspended particles in the water).

Plasticaffectshuman health.

Toxicchemicals leach out ofplasticand are found in the blood and tissue of nearly all of us.

Exposure to them is linked to cancers, birth defects, impaired immunity, endocrine disruption and other ailments

Plasticaffectshuman health.

Toxicchemicals leach out ofplasticand are found in the blood and tissue of nearly all of us.

Exposure to them is linked to cancers, birth defects, impaired immunity, endocrine disruption and other ailments

Plasticaffectshuman health.

Toxicchemicals leach out ofplasticand are found in the blood and tissue of nearly all of us.

Exposure to them is linked to cancers, birth defects, impaired immunity, endocrine disruption and other ailments

E = hc/wavelength so, lower will be the wavelength , more will be the Energy

so, option B

The three quantum numbers (n, l, and m) that describe an orbital are integers: 0, 1, 2, 3, and so on. The principal quantum number (n) cannot be zero. The allowed values of n are therefore 1, 2, 3, 4, and so on. The angular quantum number (l) can be any integer between 0 and n - 1.

physical property , option b is the correct answer.

A is metal. All metals are electropositive. They conducts when potential applied to it.

yes A is a metaltwo properties:it is lusturieousit is good conductor of electricity

is a metal all metals are electropositive that conducts when potential applied to it

a is a metal all metals are electropositive the conducts when potential applied to it

a is a metal all metals are electropositive the conductor when potential applied to it

a) A is metalb)Two physical property:conductor shine

A is metal because generally metal are electro positive.property of A1) they are good conductor of heat and electricity.2) it melting point and boiling point are generally high.3) they have lusturieos property,

A is metal because all metal are electropositive it is lusturieous it is malleable

A is metalTwo properties of metal A1)It is electropositive in nature2)It is conductor of electricity

a) A is a metal because it's tendancy is to lose electrons which bring a positive charge on itb) A produce basic oxide A is a sonorus element.

a)A is a metal because the elements which are electropositive in nature are metal (except Hydrogen gas)

b) I) it is ductile in nature II) it is malleable in nature

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electropositive elements tends to lose electronsLi+,Na+etcthey are metals low ionization energies,hardness, bright luster, resonate to sound, good conductors of heat and electricity

(a) A is a metal (b) two physical properties 1. Conductor. 2.electricity

(A) is Metal two properties: it is lusturieous . it is good conductor of electricity

A is a metal because metals are electro positive.Properties:1. it is good conductor of heat and electricity2. it has high melting and boiling points.

A is metal because it has tendency to lose electron to form electo-positive element . two physical properties are: a. it is hard ,conduct electricity ,sonorous .b. malleable ,ductile ,mosty have density .

a) Metals, because metals release their electrons of outermost shell to get positive charge on them.

b) (i) Metals are lusturous and sonorous (ii) Metals have ductility and malleability

A is metal because it posses electropositivity and all metals posses it as they loose electrons and it's physical properties are meallability and Ductility

A is metal which is malleable and ductile

Yes A is metal because they have shine and they are good conducter of electricity

A is a metal bcoz all metals are electropositive elements. it is a good conductor of electricity and lusturous

A is metal lustureness

A is a metal 2properties are metals have their own lusture or shiny They are malleable and DuctileGood conductor of electricity

metal property malleability ductility solarcity

They havesimilar chemicalproperties becauseisotopes of an elementhave thesamenumber of electrons as anatomof thatelement. The electron arrangement is thesameowing tosame chemicalproperties. However they have different numbers of neutrons, which affects the mass number

if solution is heavily heated we will get vapours called evaporation

if a liquid is heated for sometime then it curl's called boiling

boiling takes place throughout the liquid while evaporation takes place on the surface of the liquid

in boiling bubbles are formed while in evaporation no bubbles are formed.

Evaporation - It takes place below the boiling point of the liquid. It is surface phenomenon.Boiling -It takes place at a particular boiling point of the liquid. It is bulk phenomenon.

boiling is an bulk phenomenon whereas evaporation is natural phenomenon

1. IUPAC Name = Ethene

2. Common name = Acetic acid

3. Structural formula = CH3OH

Nitrogen is a 2nd period element which has no vacant d-orbital whereas Phosphorus is the element of 3rd period which hasvacantd-orbital. Hence Phosphorus can form bonds with 5 Chlorine atoms but Nitrogen can't..

Molecular Mass of CH3COOH - 60 gm

Given mass of CH3COOH - 2.5 gms

= Moles of CH3COOH = 2.5/60 = 0.0416666..... = 0.0417 approx.

Given mass of solvent (benzene in this case) = 75g

Molality (m) = (moles of solute/(gms of solvent/1000))

= 0.0417/(75/1000)

= 0.0417*1000/75

= 41.7/75 = 0.556 molal

how is magnesium choride formed by thetransder of electrons? why doestthe solution of magnesium chloride conduct electricity?

Kc&Kp

rxn 2HI -> H2+I2

moles initally 2 0 0

moles eqlb. 2-2x x x

Kc =x*x/{2-2x}^2 = (0.22)^2/4*(0.78)^2 = 0.19888

conc.(C)= P/RT for gas phase rxn

RT *(x)= PH2 =PI2 =0.19888(same as Kcbcz power o RT cancel out )

At 25°C, water will spontaneously dissociate very slightly into H+ and OH- ions, but the fraction is very small, only about 1 molecule in 10 million (10**-7) will be dissociated. The other 9,999,999 molecules remain as molecules and don't dissociate. The reaction equation is: H2O ←→ H+ + OH- and the value of the dissociation constant (Kw means the dissociation constant for water) is defined as: Kw = [H+] [OH-] / [H2O] where the bracketed items indicate the concentration. Since only about 10**-7 of the molecules dissociate, the concentrations can be expressed as [H+] = 10**-7 and [OH-] = 10**-7 and the value of undissociated water [H2O] is 1 -10**-7 which is equal to 0.9999999 or essentially equal to 1. So Kw = (10**-7)(10**-7) / 1 = 10**-14 That is how we get the dissociation constant of water (Kw) as 10**-14.

answer will be 39%( concentration will be same in both the cases..so the percent dissociation will be same that is 39%)

Displacement reactionis a chemicalreactionin which a more reactive element displaces a less reactive element from its compound. Both metals and non-metals take part indisplacement reactions. Example :Reactionof iron nails with copper sulphate solution.

Thermal decompositionis a chemicalreactionwhere a single substance breaks into two or more simple substances when heated. Thereactionis usually endothermic becauseheatis required to break the bonds present in the substance. Thisreactionis used for the preparation of oxygen.

1.A displacement reaction is a type of reaction where part of one reactant is replaced by another reactant. Example:Reactionof iron nails with copper sulphate solution2.Thermal Dissociation. a chemicalreactionin which a substance decomposes reversibly when the temperature is raised. A substance undergoingthermal dissociationmay form several substances Example:2H2O ⇄ 2H2+ O2, CaCO3⇄ CaO + CO2)

just multiply mole fraction of PCl2 with the total pressure to get p(PCl2) which is the partial pressure of PCl2...since, at equilibrium p[PCl2] = p[Cl2]there fore answer is 1

The answer is Option B.