Approximately $70\%$ of carbon dioxide absorbed by the blood is transported to the lungs:

The principle of immunization or vaccination is based on the property of ...........

The moment of inertia of a meter scale of mass $0.6\, kg$ about an axis perpendicular to the scale and located at the $20\, cm$ position on the scale in $kg\, m^2$ is (Breadth of the scale is negligible).

$A$ person is observing a bacteria through a compound microscope. For better observation and to improve its resolving power,he should:

Which of the following metal ions plays an important role in muscle contraction?

$A$ mixture of $2\, \text{moles}$ of helium gas (atomic mass $= 4\, \text{amu}$) and $1\, \text{mole}$ of argon gas (atomic mass $= 40\, \text{amu}$) is kept at $300\, \text{K}$ in a container. The ratio of the $r.m.s.$ speeds $\left( \frac{v_{\text{rms}}(\text{helium})}{v_{\text{rms}}(\text{argon})} \right)$ is