Chemistry Past Paper Questions

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Q 1221:For the reaction between PCl3 and Cl2 to form PCl5 the units of Kc are
A
mol dm-3
B
mol-1dm-3
C
mol-1 dm3
D
mol dm3
Faisalabad, 2016
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Q 1222:In a chemical reaction, the substances that combine are called:
A
Reactants
B
Products
C
Equilibrium
D
Numerator
Faisalabad, 2016
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Q 1223:Specific heat capacity of water is :
A
4.2KJg-1K-1
B
4.2Jg-1K-1
C
2.4KJg-1K-1
D
2.4Jg-1K-1
Faisalabad, 2016
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Q 1224:Temporary hardness is because of :
A
Ca(HCO₃)₂
B
CaCO3
C
MgCO₃
D
MgSO₄
Faisalabad, 2016
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Q 1225:The ability of carbon atoms to form chains is called :
A
Isomerism
B
Catenation
C
Resonance
D
Condensation
Faisalabad, 2016
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Q 1226:The color of iodine is :
A
Black
B
Yellow
C
Green
D
Purple
Faisalabad, 2016
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Q 1227:The chemical formula of Quick Lime is :
A
Ca(OH)2
B
CaCO3
C
CaO
D
CaCl2
Faisalabad, 2016
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Q 1228:The chemical formula of Rust is :
A
Fe2O3
B
Fe(OH)3
C
Fe(OH)3 . nH2O
D
Fe2O3, nH2O
Faisalabad, 2016
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Q 1229:Spontaneous chemical reaction takes place in:
A
galvanic cell
B
Down's Cell
C
Nelson's cell
D
electrolytic cell
Faisalabad, 2016
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Q 1230:Empirical formula of benzene is:
A
C2H2
B
C6H6
C
CH4
D
CH
Faisalabad, 2016
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Total MCQs: 1548Page 123 of 155
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