Chemistry Past Paper Questions

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Q 811:In a chemical reaction the substances that combines are called:
A
Reactants
B
Products
C
Derivatives
D
None of these
Bahawalpur, 2017
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Q 812:In the Kiln the given reaction CaCO3→ CaO+ CO2 goes to completion because:
A
Of high temperature
B
CaO is more stable than CaCO3
C
CO2 escapes continuously
D
CaO is not dissociated
Bahawalpur, 2017
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Q 813:Molecular formula of Butane is:
A
C3H8
B
C4H10
C
C5H12
D
C6H14
Bahawalpur, 2017
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Q 814:Oxidation of Alkenes produce:
A
Glyoxal
B
Glycol
C
Oxalic acid
D
Formic acid
Bahawalpur, 2017
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Q 815:Permanent hardness is because of:
A
Ca(HCO₃)₂
B
Mg(HCO3)2
C
NaCl
D
CaCl2
Bahawalpur, 2017
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Q 816:Photosynthesis process produces:
A
Starch
B
Glucose
C
Sucrose
D
Cellulose
Bahawalpur, 2017
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Q 817:Specific heat of water is:
A
4.2KJg-1K-1
B
2.4KJg-1K-1
C
4.2Jg-1K-1
D
2.4Jg-1K-1
Bahawalpur, 2017
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Q 818:Point out the incorrect statement about electron affinity.
A
It is measured in KJ/mole
B
it involves release of energy
C
it decreases in a period
D
it decreses in a group
Bahawalpur, 2017
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Q 819:Mark the incorrect statement about ionization energy.
A
It is measured in KJ/mole
B
It is absorption of energy
C
it decreases in a period
D
it decreses in a group
Bahawalpur, 2017
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Q 820:Molarity is the number of moles of solute dissolved in
A
1 kg of sodium
B
100g of solvent
C
1 dm3 solvent
D
1 dm3 of solution
Bahawalpur, 2017
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Total MCQs: 1548Page 82 of 155
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