Discussion
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- Question
Which of the following has a least penetrating power?
Options- A. All have same penetrating power
- B. Beta Particles
- C. Alpha particles
- D. Gamma rays
- Correct Answer
- Alpha particles
- 1. Who suggested that most of the mass of the atom is located in the nucleus?
Options- A. Thompson
- B. Bohr
- C. Rutherford
- D. Einstein Discuss
- 2. Atoms are composed of
Options- A. electrons and protons
- B. electrons only
- C. protons only
- D. electrons and nuclei Discuss
- 3. The dark lines in the solar spectrum are due to
Options- A. absorption of corresponding wavelengths by the outer layers of the sun
- B. destructive interference between waves of certain definite wavelengths
- C. absorption of corresponding wavelengths by the prism used in the photograph
- D. absence of corresponding wavelengths from the light emitted by the core of the sun Discuss
- 4. The isotope of uranium capable of sustaining chain reaction is
Options- A. U-235
- B. U-245
- C. U-239
- D. U-238 Discuss
- 5. In an atomic nucleus, neutrons and protons are held together by
Options- A. gravitational forces
- B. exchange forces
- C. coulombic forces
- D. magnetic forces Discuss
- 6. The age of most ancient geological formations is estimated by
Options- A. Ra - Si method
- B. Potassium - argon method
- C. C14 method
- D. Uranium - lead method Discuss
- 7. In an atomic explosion, enormous energy is released which is due to
Options- A. conversion of chemical energy into heat energy
- B. conversion of mechanical energy into nuclear energy
- C. conversion of mass into energy
- D. conversion of neutrons into protons Discuss
- 8. How many colours the sunlight spectrum has?
Options- A. Three
- B. Seven
- C. Four
- D. Five Discuss
- 9. Isotopes are separated by
Options- A. crystallisation
- B. sublimation
- C. distillation
- D. filtration Discuss
- 10. Which of the following rays are more penetrating?
Options- A. Beta rays
- B. Alpha rays
- C. Gamma rays
- D. X-rays Discuss
General Science problems
Search Results
Correct Answer: Rutherford
Correct Answer: electrons and nuclei
Correct Answer: absorption of corresponding wavelengths by the outer layers of the sun
Correct Answer: U-235
Correct Answer: exchange forces
Correct Answer: Uranium - lead method
Correct Answer: conversion of mass into energy
Correct Answer: Seven
Correct Answer: distillation
Correct Answer: Gamma rays
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