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SSC SCIENTIFIC ASSISTANT COACHING CENTRE IN CHENNAI SSC SCIENTIFIC ASSISTANT COACHING CENTRE IN CHENNAI

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INTELLIGENCE BUREAU COACHING CENTRE IB COACHING CENTRE

RRB – JE/SSE - www.srneducation.com

RRB PREVIOUS YEAR PAPER QUESTIONS

KELVIN PLANCK AND CLAUSIUS STATEMENTS OF SECOND LAW OF THERMODYNAMICS
Kelvin – Planck statement
 It is impossible to devise a cyclically operating device, which produces no other effect than the extraction of heat from a single thermal reservoir and delivers an equivalent amount of work.
 Heat engine with single thermal reservoir is not possible.
 For a 1-T engine the thermal efficiency =W/Q=1. No heat engine can have efficiency equal to unity.

Clausius Statement: - It is impossible to construct a device that operates in a cycle and produces no effect other than the transfer of heat from a lower-temperature body to higher-temperature body.

Equivalence of the two statements

 To prove that violation of the Kelvin-Planck Statement leads to a violation of the Clausius Statement, let us assume that Kelvin-Planck statement is incorrect.
 Consider a cyclically working device 1, which absorbs energy Q1 as heat from a thermal reservoir at TH. Equivalent amount of work W(W=Q1) is performed.
 Consider another device 2 operating as a cycle, which absorbs energy QL as heat from a low temperature thermal reservoir at TL and rejects energy QH (QH=QL+W). Such a device does not violate Clausius statement.
 If the two devices are now combined, the combined device (enclosed by the dotted boundary) transfers heat QL from the low temperature reservoir at TL to a high temperature reservoir at TH with out receiving any aid from an external agent, which is the violation of the Clausius statement.
Likewise let us assume that the Clausius statement is incorrect. So we have a device 1, cyclically working transferring heat Q from a low temperature reservoir at TL to a high temperature thermal reservoir at TH . Consider another device 2, which absorbs heat Q1 from a high temperature reservoir at TH does work W and rejects energy Q as heat tot the low temperature reservoir at TL as shown in figure.If the two devices are combined (shown in figure by a dotted enclosure), then the combined device receives energy (Q1-Q) as heat from a thermal reservoir and delivers equivalent work (W=Q1-Q) in violation of the Kelvin-Planck statement.Therefore violation of Clausius statement leads to the violation of the Kelvin-Planck statement. Hence, these two statements are equivalent.

1. Kelvin Planck’s law deals with
a) Conservation of work
b) Conservation of heat
c) Conservation of heat into work
d) Conservation of work into heat
2.
3. Which of the following law of thermodynamics is responsible for heat transfer
a) Zeroth law of thermodynamics
b) First law of thermodynamics
c) Second law of thermodynamics
d) Third law of thermodynamics
4. In which of the following processes, the heat is fully converted into work?
a) Reversible adiabatic process
b) Reversible isobaric process
c) Reversible isometric process
d) Reversible isothermal process

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IBPS PO/CLERK COACHING IBPS PO, BANK EXAM COACHING

TNEB AE JOBS

Home Tamilnadu Electricity Board (TNEB) recruits for various technical posts for Diploma and Engineering Graduates in the disciplines like Electrical, Electronics, Computer Science, Electrical and Instrumentation, Mechanical and Civil.

SRN EDUCATION - NATIONAL EDUCATION AWARD 2017 - ALL INDIA LEVEL - ACHIEVING FOR ALL INDIA COMPETITIVE & ENTRANCE EXAM COACHING INSTITUTE AWARD @ ITC GARDENIA, BENGALURU - 28TH JUNE 2017

SRN EDUCATION - GOLDEN STAR AWARD 2016 - TAMIL NADU

ENGINEERING TUTION (ALL DEPARTMENTS) @ SRN EDUCATION

PLACEMENT APTITUDE COACHING FOR COLLEGE STUDENTS @ SRN EDUCATION

WORLD’S GEOGRAPHICAL SURNAMES
Surname Name
Bengal’s sorrow Damodar River
Blue Mountains Nilgiri hills
City of Sky scrapers New York
City of seven Hills Rome
City of dreaming spires Oxford
City of palaces Kolkata
City of golden Gate San Francisco
City of magnificent building Washington D.C.
City of Eternal Springs Quito (S. America)
China’s Sorrow Hwang ho
Cockpit of Europe Belgium
Dark continent Africa
Emerald Isle Ireland
Eternal City Rome
Empire city New York
Forbidden city Lhasa (Tibet)
Garden city Chicago
Gate of tears Strait of Bab-el-Mandeb
Gateway of India Mumbai
Gift of the Nile Egypt
Granite City Aberdeen (Scotland)
Hermit Kingdom Koera
Herring pond Atlantic Ocean
Holy Land Jerusalem
Island continent Australia
Island of cloves Zanziber
Isle of pearls Bahrein (Persian Gulf)
Key to the Mediterranean Gibralter
Land of cakes Scotland

Land of maple leaf Canada
Land of morning calm Korea

Land of the thousand lakes Finland
Land of the thunderbolt Bhutan
Land of white elephant Thailand
Land of five rivers Punjab
Land of thousand elephant Laos
Land of rising sun Japan
Loneliest Island Tristan De Gunha (Mid-Atlandic)
Manchester of japan Osaka
Pillars of Hercules Strait of Gibraltar
Pearl of the Antilles Cuba

Quaker City Philadelphia
Queen of the Adriatic Venice
Roof of the world The Pamirs, central Asia
Rose pink city Jaipur
Sugar bowl of the world Cuba
Roof of the world The Pamirs, central Asia
Windy city Chicago
Whiteman’s grave Guinea coast of Africa
Yellow Rivers Huang Ho (China)

NICK NAMES OF IMPORTANT INDIAN PLACES
Nick Name Place
Golden city Amritsar
Manchester of India Ahmedabad
City of seven islands Mumbai
Queen of Arabian sea Kochi
Space city Bengaluru
Garden city of India Bengaluru
Silicon valley of India Bengaluru
Electronic city of India Bengaluru
Pink city Jaipur
Gateway of India Mumbai
Twin city Hyderabad-Secunderabad
City of festivals Madurai
Deccan Queen Pune
City of buildings Kolkata
Dakshin Ganga Godavari
Old Ganga Godavari
Egg bowis of Asia Andhra Pradesh
Soya Region Madhya Pradesh
Manchester of the South Coimbatore
City of Nawabs Lucknow
Vencice of the east Kochi
Sorrow of Bengal Damodar river
Sorrow of Bihar Kosi river
Blue Mountains Nilgiri
Queen of the mountains Mussoorie (Uttarakhand)
Sacred river Ganga
Hollywood of India Mumbai
City of Castles Kolkata
State if five rivers Punjab
City of weavers Panipat
City of lakes Srinagar
Steel city of India Jamshedpur (called Tatanager)
City of temples Varanasi
Manshester of the north Kanpur
City of Rallies New Delhi
Heaven of India Jammu & Kashmir
Boston of India Ahmedabad
Garden of spices of India Kerala
Swizerland of India Kashmir
Abode of the God Prayag (Allahabad)
Pittsburg of India Jamshedpur

COMMON AND CHEMICALS NAMES OF SOME COMPOUNDS
Common Name Chemical Name Chemical Formula
Dry Ice Soild Carbindioxide CO2
Slaked Lime Calcium Hydroxide Ca(OH)2
Bleaching Powder Calcium Hypochlorite CaOCI2
Nusadir Ammonium Chloride NH4CI
Caustic Soda Sodium Hydroxide NaOH
Rock Salt Sodium Chloride NaCI
Caustic Potash Patassium Hydorxide KOH
Potash Alum Potassium Aluminium Sulphate K2SO4AI2(SO4)3 24H2O
Epsom Magnesium Sulphate MgSO4 7H2O
Quick Lime Calcium Oxide CaO
Plaster of Paris Calcium Sulphate (CaSO4) ½ H2O
Gypsum Calcium Sulphate CaSO4 2H2O
Green Vitriol Ferrous Sulphate FeSO4 7H2O
Mohr’s Salt Ammonium Ferrous Sulphate FeSO4(NH4)2SO4 6H2O
Blue Vitriol Copper Sulphate CuSO4 5H2O
White Vitriol Zinc Sulphate ZnSO4 7H2O
Marsh Gas Methane CH4
Vinegar Acetic Acid CH3COOH
Patash Ash Potassium Carbonate K2CO3
Hypo Sodium Thiosulphate Na2S2O3 5H2O
Baking Powder Sodium Bicarbonate NaHCO3
Washing Soda Sodium Carbonate Na2CO3 10 H2O
Magnesio Magnessium Oxide MgO
Chalk (Marble) Calcium Carbonate CaCO3
Lunar Caustic Silver Nitrate AgNO3
Laughing Gas Nitrous Oxide N2O
Chloraform Tricholoro Methane CHCI3
Vermelium Mercuric Sulpide HgS
Borax Borax Na2B4O7 10H2O
Alcohol Ethyl Alcohol C2H5OH
Sugar Sucrose C12H22O11
Heavy water Duterium Oxide D2O
Gobar Salt Sodium Sulphate Na2SO4 10H2O
T.N.T Tri Nitrotoluene C6H2CH3(NO2)3
Calomel Mercurous Chloride HgCI
Sand Silicon Oxide SiO2

SOME IMPORTANT ALLOYS
Name Composition Use
Brass Cu (60 to 80%), Zn (40 to 20%) For making household utencils
Bronze Cu (75 to 90%), Sn (25 to 10%) For making coins, idols, utencils
Germon Silver Cu (60%), Zn (25%), Ni(15%) For making utencils
Magnelium Mg (5%), Ai (95%) For making aircraft frame
Rolled Gold Cu (90%), Ni(10%) For making cheap omaments
Monel metal Cu (70%), Ni(30%) For making alkali resident
containers
Bell metal Cu (85%), Zn(10%),Sn(5%) For making bells
Gun metal Cu(85%), Zn(10%), Sn(5%) Used for engineering purposes
Solder Sn(50-75%), Pb (50-25%) Soldering of metals
Duralium Al(95%),Cu(4%),Mg(0-5%),Mn(0-5%) In aircraft manufacturing
Steel Fe (98%), C (2%) For making nails, screws,
bridgess
Stainless Steel Fe(82%), Cr,Ni(18%) For making cooking utencils,