Exercise: Chemistry

Questions for: Chemistry

The number of atoms present in 21.6 gram of silver (atomic weight = 108) are same as the molecules in
A:
1.8 gram of H2O
B:
12 moles of KMnO4
C:
0.6N H2SO4
D:
4.6 gram of C2H5OH
Answer: B
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The number of waves made by an electron moving in an orbit having maximum magnetic quantum number is +3
A:
4
B:
5
C:
2
D:
zero
Answer: A
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The half life period of an isotope is 2 hours. After 6 hours what fraction of the initial quantity of the isotope will be left behind?
A:
1/6
B:
1/3
C:
1/8
D:
1/4
Answer: C
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The isomerism which exists between CH3CHCI2 and CH2CI. CH2CI is
A:
chain isomerism
B:
functional group isomerism
C:
positional isomerism
D:
metamerism
Answer: C
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The human body is made up of several chemical elements; the element present in the highest proportion (65%) in the body is
A:
carbon
B:
hydrogen
C:
oxygen
D:
nitrogen
Answer: C
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