Choose the wrong statements:

Important Questions on Environmental Chemistry

HARD

11th CBSE

IMPORTANT

Pradeep's New Course CHEMISTRY Vol.II>Chapter 14 - Environmental Chemistry>Competition FOCUS>Q 40

$\mathrm{CO}$ is a pollutant produced due to incomplete combustion of butane. One mole of butane requires $6.5$ moles of ${\mathrm{O}}_2$ for complete combustion. If $6$ moles of oxygen are available, then number of moles of $\mathrm{CO}$ produced will be?

HARD

11th CBSE

IMPORTANT

Pradeep's New Course CHEMISTRY Vol.II>Chapter 14 - Environmental Chemistry>Competition FOCUS>Q 41

In haemoglobin,$\mathrm{CO}$ and not ${\mathrm{O}}_2$ links to $\mathrm{Fe}$ (if both $\mathrm{CO}$ and ${\mathrm{O}}_2$ are present) because $\mathrm{CO}$ is a stronger ligand than ${\mathrm{O}}_2$. The number of groups to which $\mathrm{Fe}$ is coordinated other than vacant site for $\mathrm{CO}$ in haemoglobin is:

HARD

11th CBSE

IMPORTANT

Pradeep's New Course CHEMISTRY Vol.II>Chapter 14 - Environmental Chemistry>Competition FOCUS>Q 42

In measurement of ${\mathrm{BOD}}_{\mathrm{x}}$ , $\mathrm{X}$ is generally taken as

HARD

11th CBSE

IMPORTANT

Pradeep's New Course CHEMISTRY Vol.II>Chapter 14 - Environmental Chemistry>Competition FOCUS>Q 43

Water is considered as pure if it has $\mathrm{BOD}$ less than _____ $\mathrm{ppm}$ ($5/9$)