General Science problems
- 1. Mesons are found in
Options- A. Laser beam
- B. X-rays
- C. Gamma rays
- D. Cosmic rays Discuss
Correct Answer: Cosmic rays
- 2. Which of the following is used as a moderator in nuclear reactor?
Options- A. Thorium
- B. Graphite
- C. Radium
- D. Ordinary water Discuss
Correct Answer: Graphite
- 3. Nuclear fission is caused by the impact of
Options- A. neutron
- B. proton
- C. deuteron
- D. electron Discuss
Correct Answer: neutron
- 4. Atoms of an element differ from those of all other elements in
Options- 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 Discuss
Correct Answer: atomic number and electronic configuration
- 5. Which radioactive pollutant has recently drawn to public, due to its occurrence in the building material?
Options- A. Thorium
- B. Radium
- C. Plutonium
- D. Radan Discuss
Correct Answer: Thorium
- 6. Which among the following is a positively charged particle emitted by a radioactive element?
Options- A. Beta ray
- B. Alpha ray
- C. Cathode ray
- D. Gamma ray Discuss
Correct Answer: Alpha ray
- 7. The wavelength of X-rays is of the order of
Options- A. 10 micron
- B. 1 angstrom
- C. 1 cm
- D. 1 m Discuss
Correct Answer: 1 angstrom
Explanation:
1 angstrom = 1.0 x 10
-10 meters
- 8. 'No two electrons in an atom can have the same set of four quantum numbers' is
Options- A. Newton's law
- B. Bohr's law
- C. Aufbau principle
- D. Pauli's exclusion principle Discuss
Correct Answer: Pauli's exclusion principle
- 9. Which of the following shows the masses of the three elementary particles in decreasing order?
Options- A. Leptons, Baryons, Mesons
- B. Mesons, Baryons, Leptons
- C. Baryons, Mesons, Leptons
- D. Leptons, Mesons Baryons Discuss
Correct Answer: Baryons, Mesons, Leptons
- 10. According to Avogadro's Hypothesis, the smallest particle of an element or a compound, that can exist independently, is called ____ .
Options- A. a molecule
- B. a cation
- C. an anion
- D. an atom Discuss
Correct Answer: a molecule
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