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. Energy of electron -52.53kilo joule per mole is for
a. first orbit of hydrogen
b. second orbit of hydrogen
c. third orbit of hydrogen
d. fifth orbit of hydrogen
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Answer: (d).fifth orbit of hydrogen

2. Quantum numbers are
a. arithmetical values
b. numerical values
c. geometric values
d. logical values
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Answer: (b).numerical values

3. Rutherford in his atomic model could not explain behavior of
a. electrons
b. protons
c. neutrons
d. neutrino
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Answer: (a).electrons

4. Lines which are present in atomic emission spectrum are
a. brown
b. dark
c. bright
d. translucent
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Answer: (c).bright

5. The Pauli's Exclusion principle states that two electrons in same orbitals have
a. same spins
b. different spins
c. opposite spins
d. vertical spins
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Answer: (c).opposite spins

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