The p-Block Elements

A chemical which stimulates the secretion of pepsin is

The measured BOD values for four different water sample (A-D) are as follows

A = 3 ppm;                                      B = 18 ppm:                      C = 21 ppm;        D = 4 ppm.

The water samples which can be called as highly polluted with organic wastes, are

Choose the correct stability order of group 13 elements in their +1 oxidation state.

The oxoacid of phosphorus that is easily obtained from a reaction alkali and white phosphorus and has two P-H bonds, is:

Production of iron in blast furnace follows the following equation

$F{e}_3{O}_4\left(s\right)+4CO\left(g\right)\to 3Fe\left(I\right)+4C{O}_2\left(g\right)$

When 4.640 kg of Fe₃O₄ and 2.520 kg of CO are allowed to react then the amount of iron (in g) produced is:

[Given : Molar Atomic mass (g mo^-1); Fe = 56

Molar Atomic mass (g mol^-1); O = 16

Molar Atomic mass (g mol^-1); C = 12]

Calgon is used for water treatment. Which of the following statement is NOT true about Calgon?

Production of iron in blast furnace follows the following equation

$F{e}_3{O}_4\left(s\right)+4CO\left(g\right)\to 3Fe\left(I\right)+4C{O}_2\left(g\right)$

When 4.640 kg of Fe₃O₄ and 2.520 kg of CO are allowed to react then the amount of iron (in g) produced is:

[Given : Molar Atomic mass (g mo^-1); Fe = 56

 Molar Atomic mass (g mol^-1); O = 16

Molar Atomic mass (g mol^-1); C = 12]

The number of terminal oxygen atoms present in the product B obtained from the following reaction is_____________.

$FeC{r}_2{O}_4+N{a}_{2}C{O}_3+O_2\to A+F{e}_2{O}_3+C{O}_2$

$A+H^{+}\to B+H_{2}O+N{a}^{+}$

Borazine, also known as inorganic benzene, can be prepared by the reaction of 3-equivalents of “X” with 6-equivalents of “Y”. 'X' and “Y”, respectively are: