E-PolyLearning

Welcome to the largest collection of MCQs on the Internet. Access and Discuss these Multiple choice questions for various competitive Exams and Interviews.
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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