THE ULTIMATE SAMPLE PAPER FOR
CHEMISTRY
कक्षा/CLASS:XI अविकतमअंक/M.M.:70
विषय/SUB.:रसायनविज्ञान(CHEMISTRY-043) समय/TIME:03घंटे/Hours
General Instructions:
(a) Thereare33questionsinthisquestionpaperwithinternalchoice.
(b) SECTIONAconsistsof16multiple-choicequestionscarrying1markeach.
(c) SECTIONBconsistsof5shortanswerquestionscarrying2markseach.
(d) SECTIONCconsistsof7shortanswerquestionscarrying3marks each.
(e) SECTIONDconsistsof2case -basedquestionscarrying4marks each.
(f) SECTIONEconsistsof3longanswerquestionscarrying5marks each.
SECTIONA
Followingquestionaremultiple-choicequestionwithonecorrectanswer.Eachquestion carries 1
mark. There is no internal choice in this section.
1 Both CO2and CO are made from Carbon and Oxygen. Now you will find that 1 mole of CO 1
contains 12 g of Carbon and 16 g of oxygen. 1 mole of CO 2contains 12 g Carbon and 32 g of
oxygen. The ratio of themass of oxygen in both compounds is a whole number. Which of the
following law is suitable for the above statement.
a)Lawofconservationofmass b)Lawofdefiniteproportions
c)Lawofmultiple proportions d)Avogadro'slaw
2 Thenumberofunpairedelectronsinsulferatomis: 1
a)1 b)2 c)3 d)4
3 Thesetofquantumnumbersnotpossibleforanelectron is: 1
a)n=3, l=2,m=-1,s=+1/2 b)n=4,l=0,m=0,s = -1/2
c)n =2,l=1, m=+2, s=+1/2 d)n=1,l=0,m=0,s = -1/2
4 Enthalpyisathermodynamicpropertyofsystemandit’sextensiveinnature. Theenthalpy 1
change in a reaction does not depend upon
a)The states of reactants and b)Thenatureofthereactantsand
products products
c)Differentintermediatestepsinthe d)Initialandfinalenthalpyofthe
reaction reaction
5 AmongthefollowingelementsLi,Al,MgandRbthecorrectorderof increasingmetallic character is: 1
a)Al<Rb<Mg<Li b)Li<Al<Mg<Rb
c) Rb<Mg<Al<Li d)Li<Mg<Al<Rb
6 Theoxidationnumberof ‘Mn’is maximum in 1
a)MnO2 b)K2MnO4 c)KMnO4 d)Mn3O4
, 7 Here are some example of equilibrium reactions. Now choose the one in which the value of 1
enthalpyofreaction (∆H)willbelowerthanthevalueofinternalenergyofthereaction(∆U):
a)2NOCl (g) ⇋2NO(g)+ Cl2(g) b)2Cu(NO3)2(s)⇋2CuO(s)+4NO2(g)+
O2(g)
c)H2(g)+ I2(g)⇋2HI(g) d)CaO(s)+CO2()g⇋CaCO3(s)
8 Whichofthefollowingpairofgasescontainsamenumberofmolecules 1
a)14gof N2and22 gofO2 b)44 gCO2and44gof H2O
c)14gofN2and 16 gofO2 d)28gof N2and34 gofO2
9 Arrangethefollowingindecreasingorderoftheirboiling points. 1
(A)n-Butane (B)2-Methylbutane
(C)n-Pentane (D)2,2-Dimethylpropane
a)C>B>D>A b)B>C>D>A c)D>C>B>A d)A>B>C>D
10 IntheorganiccompoundCH2=CHCH(CH3)CH2C≡CH,thepairofhybridisedorbitalsinvolved in the 1
formation of C2– C3bond is:
a)sp –sp2 b)sp–sp3 c)sp2–sp3 d)sp3–sp3
11 TheIUPACnameofthefollowingcompoundis 1
a)3-Bromo-6-ethyl-6-methylhexene b)3-Bromo-6-ethyl-6-methylhex-2-ene
c)6-Bromo-3-ethyl-3-methylhexene d)3-Bromo-6,6-methylethylhexene
12 Themoststableresonating structureofprop-2-enalis 1
13 Assertion(A):Caesiummetalshowsgreaterreactivitytowardsphotoelectriceffect. 1
Reason(R): photoelectriceffectiseasilypronouncedbythemetalhavinglowionization energy.
a) BothAandRaretrue,andRisthecorrect explanationofA.
b) BothAandRaretrue,andRisnotthecorrect explanationofA.
c) AistruebutRis false.
d) AisfalsebutRistrue.
14 Assertion(A):Heisenberg'sUncertaintyPrinciplestatesthatitisimpossibleto simultaneously 1
determine the exact position and momentum of a particle.
Reason(R): Theprincipleisaconsequenceofthewave-particledualityofmatter.
a) BothAandRaretrue,andRisthecorrect explanationofA.
b) BothAandRaretrue,andRisnotthecorrect explanationofA.
c) AistruebutRis false.
d) AisfalsebutRistrue.
CHEMISTRY
कक्षा/CLASS:XI अविकतमअंक/M.M.:70
विषय/SUB.:रसायनविज्ञान(CHEMISTRY-043) समय/TIME:03घंटे/Hours
General Instructions:
(a) Thereare33questionsinthisquestionpaperwithinternalchoice.
(b) SECTIONAconsistsof16multiple-choicequestionscarrying1markeach.
(c) SECTIONBconsistsof5shortanswerquestionscarrying2markseach.
(d) SECTIONCconsistsof7shortanswerquestionscarrying3marks each.
(e) SECTIONDconsistsof2case -basedquestionscarrying4marks each.
(f) SECTIONEconsistsof3longanswerquestionscarrying5marks each.
SECTIONA
Followingquestionaremultiple-choicequestionwithonecorrectanswer.Eachquestion carries 1
mark. There is no internal choice in this section.
1 Both CO2and CO are made from Carbon and Oxygen. Now you will find that 1 mole of CO 1
contains 12 g of Carbon and 16 g of oxygen. 1 mole of CO 2contains 12 g Carbon and 32 g of
oxygen. The ratio of themass of oxygen in both compounds is a whole number. Which of the
following law is suitable for the above statement.
a)Lawofconservationofmass b)Lawofdefiniteproportions
c)Lawofmultiple proportions d)Avogadro'slaw
2 Thenumberofunpairedelectronsinsulferatomis: 1
a)1 b)2 c)3 d)4
3 Thesetofquantumnumbersnotpossibleforanelectron is: 1
a)n=3, l=2,m=-1,s=+1/2 b)n=4,l=0,m=0,s = -1/2
c)n =2,l=1, m=+2, s=+1/2 d)n=1,l=0,m=0,s = -1/2
4 Enthalpyisathermodynamicpropertyofsystemandit’sextensiveinnature. Theenthalpy 1
change in a reaction does not depend upon
a)The states of reactants and b)Thenatureofthereactantsand
products products
c)Differentintermediatestepsinthe d)Initialandfinalenthalpyofthe
reaction reaction
5 AmongthefollowingelementsLi,Al,MgandRbthecorrectorderof increasingmetallic character is: 1
a)Al<Rb<Mg<Li b)Li<Al<Mg<Rb
c) Rb<Mg<Al<Li d)Li<Mg<Al<Rb
6 Theoxidationnumberof ‘Mn’is maximum in 1
a)MnO2 b)K2MnO4 c)KMnO4 d)Mn3O4
, 7 Here are some example of equilibrium reactions. Now choose the one in which the value of 1
enthalpyofreaction (∆H)willbelowerthanthevalueofinternalenergyofthereaction(∆U):
a)2NOCl (g) ⇋2NO(g)+ Cl2(g) b)2Cu(NO3)2(s)⇋2CuO(s)+4NO2(g)+
O2(g)
c)H2(g)+ I2(g)⇋2HI(g) d)CaO(s)+CO2()g⇋CaCO3(s)
8 Whichofthefollowingpairofgasescontainsamenumberofmolecules 1
a)14gof N2and22 gofO2 b)44 gCO2and44gof H2O
c)14gofN2and 16 gofO2 d)28gof N2and34 gofO2
9 Arrangethefollowingindecreasingorderoftheirboiling points. 1
(A)n-Butane (B)2-Methylbutane
(C)n-Pentane (D)2,2-Dimethylpropane
a)C>B>D>A b)B>C>D>A c)D>C>B>A d)A>B>C>D
10 IntheorganiccompoundCH2=CHCH(CH3)CH2C≡CH,thepairofhybridisedorbitalsinvolved in the 1
formation of C2– C3bond is:
a)sp –sp2 b)sp–sp3 c)sp2–sp3 d)sp3–sp3
11 TheIUPACnameofthefollowingcompoundis 1
a)3-Bromo-6-ethyl-6-methylhexene b)3-Bromo-6-ethyl-6-methylhex-2-ene
c)6-Bromo-3-ethyl-3-methylhexene d)3-Bromo-6,6-methylethylhexene
12 Themoststableresonating structureofprop-2-enalis 1
13 Assertion(A):Caesiummetalshowsgreaterreactivitytowardsphotoelectriceffect. 1
Reason(R): photoelectriceffectiseasilypronouncedbythemetalhavinglowionization energy.
a) BothAandRaretrue,andRisthecorrect explanationofA.
b) BothAandRaretrue,andRisnotthecorrect explanationofA.
c) AistruebutRis false.
d) AisfalsebutRistrue.
14 Assertion(A):Heisenberg'sUncertaintyPrinciplestatesthatitisimpossibleto simultaneously 1
determine the exact position and momentum of a particle.
Reason(R): Theprincipleisaconsequenceofthewave-particledualityofmatter.
a) BothAandRaretrue,andRisthecorrect explanationofA.
b) BothAandRaretrue,andRisnotthecorrect explanationofA.
c) AistruebutRis false.
d) AisfalsebutRistrue.
