Chemistry Past Paper Questions

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Q 1451:Which one of the following salts make the water permanent hard?
A
Na2CO3
B
NaHCO3
C
Ca(HCO3)2
D
CaSO4
Rawalpindi, 2016
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Q 1452:Which one of the following solution contains more water?
A
1 mole of CO and 1 mole of N2
B
2 M
C
0.5 M
D
0.25 M
Rawalpindi, 2016
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Q 1453:Which one of the following resulted in the discovery of Proton?
A
UV rays
B
Canal rays
C
X-rays
D
None of these
Rawalpindi, 2016
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Q 1454:A bond pair in covalent molecules usually has:
A
One electron
B
Two electrons
C
Three electrons
D
Four electrons
Sahiwal, 2016
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Q 1455:A disease that cause bone and tooth damage is:
A
Hepatitis
B
Cholera
C
Fluorosis
D
Jaundice
Sahiwal, 2016
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Q 1456:A hydrocarbon has molecular formula C8H14. What is molecular formula of next member of same homologous series?
A
C9H18
B
C9H16
C
C9H20
D
C9H12
Sahiwal, 2016
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Q 1457:Color of I2 gas is:
A
Red
B
Purple
C
Green
D
Blue
Sahiwal, 2016
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Q 1458:Crude oil is heated in the furnace upto:
A
300°C
B
350°C
C
400°C
D
450°C
Sahiwal, 2016
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Q 1459:An example of ionic compound is:
A
NaCl
B
HCl
C
CH2
D
CH4
Sahiwal, 2016
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Q 1460:Atomic number of an element is represented by symbol.
A
A
B
C
C
X
D
Z
Sahiwal, 2016
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Total MCQs: 1548Page 146 of 155
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