Chemistry NCERT Exemplar Solutions Class 11th Chapter Ten

For the reaction

$2{\mathrm{H}}_2\left(\mathrm{g}\right)+2\mathrm{N}\mathrm{O}\left(\mathrm{g}\right)?{\mathrm{N}}_2\left(\mathrm{g}\right)+2{\mathrm{H}}_2\mathrm{O}$ , the observed rate expression is, rate = ${\mathrm{k}}_{\mathrm{f}}[\mathrm{N}\mathrm{O}{]}^2\left[{\mathrm{H}}_2\right]$ . The rate expression for the reverse reaction is:

Identify the correct labels of $\mathrm{A},\mathrm{B}$ and $\mathrm{C}$  in the following graph from the options given below

Root mean square speed $\left({\mathrm{V}}_{\mathrm{r}\mathrm{m}\mathrm{s}}\right)$ ; most probable speed $\left({\mathrm{V}}_{\mathrm{m}\mathrm{p}}\right)$ ; Average $\mathrm{s}\mathrm{p}\mathrm{e}\mathrm{e}\mathrm{d}?\left({\mathrm{V}}_{\mathrm{a}\mathrm{v}}\right)$

Within each pair of elements $\mathrm{F}\&\mathrm{C}\mathrm{l},\mathrm{S}\&\mathrm{S}\mathrm{e}$ and $\mathrm{L}\mathrm{i}\&\mathrm{N}\mathrm{a}$ , respectively, the elements that release more energy upon an electron gain are

The redox reaction among the following is

The refining method used when the metal and the impurities have low and high melting temperatures, respectively is

In the following reactions, products(A) and $\left(B\right)$ respectively are $\underset{\text{(Hot and Conc)}}{\mathrm{N}\mathrm{a}\mathrm{O}\mathrm{H}}+{\mathrm{C}\mathrm{l}}_2?\left(\mathrm{A}\right)+$ side products $\mathrm{C}\mathrm{a}(\mathrm{O}\mathrm{H}{)}_2{\mathrm{C}\mathrm{l}}_2?(\mathrm{B})+$ side products (Dry)

Two balls of same mass and carrying equal charge are hung by threads of length $l$ from a fixed support. At electrostatic equilibrium, assuming that angles made by each thread is small, the separation, $x$ between the balls is proportional to:

(a.) $l$

(b.) $l^2$

(c.) $l^{2/3}$

(d.) $l^{1/3}$

Based on the passage, which of the following best captures the meaning of HIF, or hypoxia-inducible factor?

A. It is a protein that increases inside the cell when the oxygen levels fall, helping the cell survive.
B. It inhibits oxygen carrying process in the body as the oxygen level increases inside the cell.
C. It enables cells to adapt quickly to the changing environment and helps in its survival.
D. It regulates the amount of oxygen available to the cell and the body during exercise.

Based on the passage, which of the following best captures the meaning of HIF, or hypoxia-inducible factor?

A. It is a protein that increases inside the cell when the oxygen levels fall, helping the cell survive.
B. It inhibits oxygen carrying process in the body as the oxygen level increases inside the cell.
C. It enables cells to adapt quickly to the changing environment and helps in its survival.
D. It regulates the amount of oxygen available to the cell and the body during exercise.