1. | 'Atom' name was given by |
a. | Democritus |
b. | Bohr |
c. | Rutherford |
d. | Archimedes |
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Answer: (a).Democritus
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2. | Number of unstable isotopes are |
a. | 300 |
b. | 50 |
c. | 370 |
d. | 360 |
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Answer: (a).300
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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
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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
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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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