$A$ metal $M$ and its compound can give the following observable changes in a sequence of reactions:

Identify the product $(C)$ in the following series of reactions:
Cyclopentane $\xrightarrow{Br_2 (1 \ eq), h\nu} (A)$ $\xrightarrow{Alc. KOH} (B)$ $\xrightarrow{NBS} (C)$

Which of the following groups of mineral elements is present in higher amounts in living organisms?

The venous system of a frog differs from that of a mammal due to the presence of:

At identical temperature and pressure,the rate of diffusion of hydrogen gas is $3\sqrt{3}$ times that of a gaseous hydrocarbon having molecular formula $C_nH_{2n-2}$. What is the value of $n$?

If the angle $2 \theta$ is acute,then the acute angle between the pair of straight lines $x^2(\cos \theta - \sin \theta) + 2xy \cos \theta + y^2(\cos \theta + \sin \theta) = 0$ is: