Chemistry NCERT Exemplar Solutions Class 11th Chapter Ten

Consider the following reactions:

$\mathrm{N}\mathrm{a}\mathrm{C}\mathrm{l}+{\mathrm{K}}_2{\mathrm{C}\mathrm{r}}_2{\mathrm{O}}_7+\underset{\text{(Conc.)}}{{\mathrm{H}}_2{\mathrm{S}\mathrm{O}}_4?\left(\mathrm{A}\right)+\text{side products}}$

(A) $+\mathrm{N}\mathrm{a}\mathrm{O}\mathrm{H}$
$\left(\mathrm{B}\right)+$ Side products
(B) $+{\mathrm{H}}_2{\mathrm{S}\mathrm{O}}_4+{\mathrm{H}}_2{\mathrm{O}}_2?($  dilute)
(C) + Side products

The sum of the total number of atoms in one molecule each of  and  is         

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.

3. When a metal of group 1 was dissolved in liquid ammonia, the following observations were obtained:

(i) Blue solution was obtained initially.

(ii) On concentrating the solution, blue colour changed to bronze colour. How do you account for the blue colour of the solution?

Give the name of the product formed on keeping the solution for some time.