Chemistry Past Paper Questions

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Q 511:If a ray of light in glass is incident on an air surface at an angle greater than the critical angle the ray will:
A
Reflect only
B
Refract only
C
Partially Reffract and Partially reflect
D
Diffract only
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Q 512:If we double both the current and voltage in a circuit while keeping its resistance constant, the power.
A
Remain uncharged
B
Halves
C
Doubles
D
Quadruples
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Q 513:Oxidation of alkenes produce.
A
Glyoxal
B
Glycol
C
Oxalic acid
D
Formic acid
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Q 514:Pentahydroxy ketone is called:
A
Glucose
B
Starch
C
Sucrose
D
Fructose
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Q 515:Pitch is black residue of:
A
Coke
B
Coal tar
C
Coal
D
Coal Gas
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Q 516:Liquids are denser than gases ______ times:
A
100
B
1000
C
10000
D
100000
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Q 517:Mendeleev periodic table was based upon the:
A
Electronic configuration
B
Atomic Mass
C
Atomic Number
D
Completion of a Shell
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Q 518:Mendeleev's periodic table was based upon the:
A
Electronic Configuration
B
atomic mass
C
Atomic number
D
Completion of Subshell
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Q 519:Number of elements in fourth period of Modern periodic Table is:
A
2
B
8
C
18
D
32
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Q 520:Oxidation of "N" in HNO3 is:
A
+2
B
+3
C
+4
D
+5
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Total MCQs: 1548Page 52 of 155
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