1. In an atomic nucleus, neutrons and protons are held together by
A. gravitational forces
B. exchange forces
C. coulombic forces
D. magnetic forces
2. 'No two electrons in an atom can have the same set of four quantum numbers' is
A. Newton's law
B. Bohr's law
C. Aufbau principle
D. Pauli's exclusion principle
3. According to Avogadro's Hypothesis, the smallest particle of an element or a compound, that can exist independently, is called ____ .
A. a molecule
B. a cation
C. an anion
D. an atom
4. Atoms of an element differ from those of all other elements in
A. atomic number and electronic configuration
B. number of neutrons and number of valence electrons
C. atomic number and number of valence electrons
D. number of neutrons and electronic configuration
5. Nuclear fission is caused by the impact of
A. neutron
B. proton
C. deuteron
D. electron
6. Which of the following rays are more penetrating?
A. Beta rays
B. Alpha rays
C. Gamma rays
D. X-rays
7. How many colours the sunlight spectrum has?
A. Three
B. Seven
C. Four
D. Five
ANSWERS:
1. Answer: Option B
2. Answer: Option D
3. Answer: Option A
4. Answer: Option A
5. Answer: Option A
6. Answer: Option C
7. Answer: Option B
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