Six identical conducting rods are joined as shown in the figure. Points $A$ and $D$ are maintained at temperatures $200\,^{\circ}C$ and $20\,^{\circ}C$,respectively. The temperature of junction $B$ will be ......... $^{\circ}C$.

If the vector $a = 2\hat{i} + 3\hat{j} + 6\hat{k}$ and $b$ are collinear and $|b| = 21$,then $b$ is equal to:

Which of the following statements regarding growth is incorrect?

The volume of the tetrahedron formed by the coterminous edges $\vec{a}, \vec{b}, \vec{c}$ is $3$. Then the volume of the parallelepiped formed by the coterminous edges $\vec{a} + \vec{b}, \vec{b} + \vec{c}, \vec{c} + \vec{a}$ is

Identify the glycosidic linkage present in maltose.

The ratio of the specific heat capacities of a gas is $1.5$. When the gas undergoes an adiabatic process,its volume is doubled and pressure becomes $P_1$. When the gas undergoes an isothermal process,its volume is doubled and pressure becomes $P_2$. If $P_1 = P_2$,the ratio of the initial pressures of the gas when it undergoes adiabatic and isothermal processes is