ECAT Chemistry Online Test With Answers

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ECAT Chemistry Online Test

Sr. # Questions Answers Choice
1 Objects of the size of an atom can be observed in An electron microscope An x-ray spectrum Atomic absorption spectrum A visible spectrum
2 The atomic mass is measured in atomic mass unit (a.m.u.) which is equal to 1.661 x 10<sup>-27- Kg</sup> 1.661 x 10<sup>-24</sup>Kg 1.661 x 10<sup>-27- g</sup> 1.661 x 10<sup>-24</sup>mg
3 The wave length of visible light is 500 nm. In S.I. unit this value is 5 x 10<sup>-8</sup>m 5 x 10<sup>-9</sup>m 500 x 10<sup>-7</sup>m 500 x 10<sup>-9</sup>m
4 Which of the sub-atomic particles is not charged Electron Proton Neutron All of them
5 The atom of an element is The smallest particle The fundamental particle The independent particle The charged particle
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