Question

A star's mass is $25\times {10}^{30}\text{kg}$. Which of the following could be its final stage of life?

• A. Black hole
• B. White dwarf
• C. Stellar nebula
• D. Neutron star

Answer 1

The correct option is D Neutron star

Given:
The star's mass, $\text{M}=25\times {10}^{30}\text{kg}$
The mass of the Sun, ${\text{M}}_{\text{Sun}}=2\times {10}^{30}\text{kg}$
$⟹\text{M}=\frac{25\times {10}^{30}}{2\times {10}^{30}}=12.5{\text{M}}_{\text{Sun}}$
We know that stars of mass greater than $8{\text{M}}_{\text{Sun}}$ and less than $25{\text{M}}_{\text{Sun}}$, would become super red giant stars in their last parts of life, and finally become a neutron star.
Therefore, the given star becomes a neutron star in the final stage of its life, as $8<12.5<25$.