Recent questions in Chemistry

In a polymer sample 30% molecules have a molecular mass 20,000,40% have molecular mass 30,000 and the rest have 60,000.Mass average and number average and number average molecular masses,respectively are

asked Mar 13, 2014 by sreemathi.v

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A system is taken from state A to state B along two different paths 1 and 2. The Work done on the system along these two path is $W_1$ and $W_2$ The heat absorbed by the system along these paths are $Q_1$ and $Q_2$ respectively. Then

asked Mar 13, 2014 by meena.p

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Which of the following has low tensile strength than natural rubber?

asked Mar 13, 2014 by sreemathi.v

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The process in which heat is neither allowed to enter nor allowed to leave the system but in which temperature changes in known as

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The catalyst used for the preparation of the monomer of neoprene rubber is

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Inversion Temperature is

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Which is equal to the total work done?

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Which of the following is obtained on heating navolac with formaldehyde?

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For an ideal gas

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Which of the following polymers is not used to make cups and plates?

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$100\; mL$ of $ 0.10M\; HCl$ is mixed with $100\; mL$ of $0.10M\; NaOH.$ The solution temperature rises by $6.0 ^{\circ}C.$ Calculate the enthalpy of neutralization per mole of $HCl.$

asked Mar 13, 2014 by meena.p

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Which of the following is the intermediate compound in the polymerisation of melamine formaldehyde resin?

asked Mar 13, 2014 by sreemathi.v

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An ideal Carnot heat engine operates on a temperature difference of $210$ degrees. One third of the heat absorbed from the source is discharged to the sink. If the work done per cycle is $400 \;J$. The amount of heat released $(q_1)$ at the sink is

asked Mar 13, 2014 by meena.p

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An ideal Carnot heat engine operates on a temperature difference of $210$ degrees. One third of the heat absorbed from the source is discharged to the sink. If the work done per cycle is $400\; J.$ The amount of heat absorbed $(q_2)$ by an engine at source is _________

asked Mar 13, 2014 by meena.p

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An ideal Carnot heat engine operates on a temperature difference of $210$ degrees. One third of the heat absorbed from the source is discharged to the sink. If the work done per cycle is $400\; J$. Efficiency $(\eta)$ of an ideal carnot heat engine is

asked Mar 13, 2014 by meena.p

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An ideal Carnot heat engine operates on a temperature difference of $210\;$ degrees. One third of the heat absorbed from the source is discharged to the sink. If the work done per cycle is $400\; J.$ Sink $(T_1)$ and Source $(T_2)$ temperatures respectively are

asked Mar 13, 2014 by meena.p

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Which of the following commercially important polymers have the monomers urea and formaldehyde?

asked Mar 13, 2014 by sreemathi.v

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In an open beaker held at $27^{\circ}C$ and $1\; atm$ pressure containing dilute sulphuric acid, $100\; g$ zinc were added. The work done by the liberated gas is _______

asked Mar 13, 2014 by meena.p

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Which of the following polymers polymerisation process involves microbiological systhesis of latic acid?

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For which of the following change $\Delta H = \Delta E?$

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Which of the following biogradable polymer is used in speciality packaging and as drug capsules?

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The compound caprolactum is obtained from

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What is the name of the given polymer?

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Ethylene diamine is a example of a _____ ligand.

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The given compound is a polymer named

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Which of the following system has max number of unpaired electrons or max para magnetism.

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Catalyst required for the preparation of vinyl cyanide

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Which of the following is a copolymer?

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Highest molar conductivity is exhibited by

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What is the co-ordination number of the central metal ions in $[Mo(CN)_8]^{4-}$

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Oxidation state of central metal atom in $[CO(NH_3)_5Cl]^{2+}$

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Which set of the following is the monomers of PHBV?

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The Compound which is used in preservation of wood is :

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Impurities of lead in silver all removed by

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The percentage of sulphur used for vulcanisation of natural rubber for making tyres and battery case are respectively.

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$AgCl$ precipitate dissolves in $NH_3$ due to the formation of

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What does 'Bu' & 'Na' & 'S' stand for in Buna-S polymer respectively?

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The range of temperature in which vulcanized rubber can be used is

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What is the other name of the monomer of natural rubber?

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The other name for bakelite is

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Which metal involves in leaching

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Chemically philospher's wool is :

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Corrosive sublimate is

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Iron is extracted from :

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Lucite is a polymer of

asked Mar 12, 2014 by thanvigandhi_1

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The monomer unit of PAN is

asked Mar 12, 2014 by thanvigandhi_1

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The starting material for PCTFE is

asked Mar 12, 2014 by thanvigandhi_1

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On heating ( with the below diagram ) with buta 1,3 diene results in the formation of

asked Mar 12, 2014 by thanvigandhi_1

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Which of the following are biopolymers?

asked Mar 12, 2014 by thanvigandhi_1

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The polymer used in orthopedic devices andin controlled drug release is

asked Mar 12, 2014 by thanvigandhi_1

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