How many $ATP$ molecules are released when one molecule of glucose is oxidized in our liver cells?

Limestone is present in the blast furnace production of iron in order to:
$(I)$ provide a source of $CaO$
$(II)$ remove some impurities
$(III)$ supply $CO_2$

Which of the following reagents can form a hydrazone with alkanone?

Which of the following representations correctly explains the function of a mitochondrion?

Assertion : In the purely resistive element of a series $LCR$ $AC$ circuit,the maximum value of $rms$ current increases with an increase in the angular frequency of the applied $emf$.
Reason : $I_{\max} = \frac{\varepsilon_{\max}}{Z}$,where $Z = \sqrt{R^2 + (\omega L - \frac{1}{\omega C})^2}$ and $I_{\max}$ is the peak current in a cycle.

Two nuclei have their mass numbers in the ratio of $1 : 3.$ The ratio of their nuclear densities would be