Question
What are primary and secondary pollutants of air?
✓
Answer
Primary pollutants are those which remain as such in atmosphere e.g., NO.
Secondary pollutants are formed by reaction between primary pollutants e.g., PAN (peroxy acetyl nitrate).
Secondary pollutants are formed by reaction between primary pollutants e.g., PAN (peroxy acetyl nitrate).
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Similar questions
Identify the most stable species in the following set of ions giving reasons:
$+\ \ \ \ \ \ +\ \ \ \ \ \ \ \ \ \ +\ \ \ \ \ \ \ \ \ \ \ +\\\text{CH}_3,\ \text{CH}_2\text{Br},\ \text{CH}\ \text{Br}_2,\ \text{C}\ \text{Br}_3$
→$+\ \ \ \ \ \ +\ \ \ \ \ \ \ \ \ \ +\ \ \ \ \ \ \ \ \ \ \ +\\\text{CH}_3,\ \text{CH}_2\text{Br},\ \text{CH}\ \text{Br}_2,\ \text{C}\ \text{Br}_3$
Give IUPAC name of the following compounds:
Predict the dipole moment of:
→- A molecule of the type $\mathrm{AX}_2$ having a linear geometry.
- A molecule of the type $\mathrm{AX}_4$ having tetrahedral geometry.
- A molecule of the type $\mathrm{AX}_2$ having angular geometry.
- A molecule of the type $\mathrm{AX}_4$ having square planar geometry.
At $298 \mathrm{~K} . \mathrm{K}_{\mathrm{p}}$ for the reaction $\text{N}_2\text{O}_4(\text{g})\rightleftharpoons2\text{NO}_2(\text{g})\ \text{is}\ 0.98.$ Predict whether the reaction is spontaneous or not.
→Nucleophiles and electrophiles are reaction intermediates having electron rich and electron deficient centres respectively. Hence, they tend to attack electron deficient and electron rich centres respectively. Classify the following species as electrophiles and nucleophiles.
→- $\text{H}_3\text{CO}^-$
- $\ \ \ \ \ \ \ \ \ \ \ \ \ \text{O}\\\ \ \ \ \ \ \ \ \ \ \ \ \ ||\\\text{H}_3\text{C}-\text{C}-\text{O}^-$
- $\ \dot{}\\\text{Cl}$
- $\text{Cl}_2\text{C}:$
- $(\text{H}_3\text{C})_3\text{C}^+$
- $\text{Br}^-$
- $\text{H}_3\text{COH}$
- $\text{R}-\text{NH}-\text{R}$
The $\text{H}-\text{S}-\text{H}$ bond angle in $\mathrm{H}_2 \mathrm{S}$ is 92.2° whereas the $\text{H}-\text{O}-\text{H}$ bond angle in $\mathrm{H}_2 \mathrm{O}$ is 104.5°, why?
→Why is ammonia termed as a base though it does not contain $\text{OH}^-$ ions?
→Nitric acid acts only as an oxidising agent while nitrous acid acts both as an oxidising as well as reducing agent. Explain.
What happens when
- Calcium phosphide is hydrolysed
- Ammonia reacts with water
Explain the following:
Aluminium forms $\left[\mathrm{AlF}_6\right]^{3-}$ ion but boron does not form $\left[\mathrm{BF}_6\right]^{3-}$ ion.
→Aluminium forms $\left[\mathrm{AlF}_6\right]^{3-}$ ion but boron does not form $\left[\mathrm{BF}_6\right]^{3-}$ ion.