Question

Select the statement which is 'NOT' true about Big Bang Theory.

• A. Big Bang Theory explains the origin of Universe.
• B. As Universe expanded, the temperature came down.
• C. Hydrogen and Helium gases formed before the explosion.
• D. The gases condensed under gravitation and formed the galaxies.

Hint:

Fundamental cosmology concept: Nothing material (no atoms, no gases) existed before the Big Bang. Matter formation is a direct consequence of the cooling universe after the expansion began.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept: The Big Bang Theory is the leading cosmological explanation about how the universe began from a singularity.
Step 2: Key Formula or Approach: Analyze each statement against the standard timeline of events proposed by the Big Bang cosmological model.
Step 3: Detailed Explanation: Statement (1) is true: The theory is primarily concerned with explaining the singular huge explosion that resulted in the origin of the universe.
Statement (2) is true: The universe immediately expanded following the explosion, and as it expanded, its temperature drastically dropped.
Statement (4) is true: The elements formed eventually condensed under the force of gravitation to form stars and galaxies.
Statement (3) is NOT true: According to the theory, there was no matter in the form of actual gases "before" the Big Bang. The universe was a singular, infinitely dense, hot point. The simple gases Hydrogen and Helium were formed after the explosion as the universe expanded and cooled down sufficiently for subatomic particles to combine into actual atoms.
Step 4: Final Answer: Statement (3) is the incorrect statement.