PolyLearning

1. 'Atom' name was given by
a. Democritus
b. Bohr
c. Rutherford
d. Archimedes
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Answer: (a).Democritus

2. Number of unstable isotopes are
a. 300
b. 50
c. 370
d. 360
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Answer: (a).300

3. Empirical formula of benzene is similar to
a. water
b. glycerin
c. hydrogen peroxide
d. glucose
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Answer: (c).hydrogen peroxide

4. Relative number of ions in mass spectrometer is plotted as
a. shells
b. z axis
c. abscissa
d. ordinate
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Answer: (d).ordinate

5. Isotopes present in nature are
a. 270
b. 280
c. 290
d. 300
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Answer: (b).280

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