Download App

Atmospheric Pollution — CHEMISTRY STD 9 — Question

ICSE BoardEnglish MediumSTD 9CHEMISTRYAtmospheric Pollution5 Marks
Question
State the main sources and effects of carbon monoxide.
✓

Answer

Carbon monoxide is formed by incomplete combustion of fuels in homes, factories and automobiles.
Effects of carbon monoxide are as follows:
It is a highly poisonous gas.
It reduces the oxygen-carrying capacity of blood by an amount equivalent to the amount of haemoglobin converted to carboxyhaemoglobin.
Haemoglobin + CO → Carboxyhaemoglobin
Because heart and brain are the two tissues most sensitive to oxygen depletion, they show the most serious effects of carbon monoxide exposure.
In high concentrations, carbon monoxide may kill by paralysing normal brain action.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "[5 Mark Question Answer]" from Atmospheric Pollution→Atmospheric Pollution — all question types→CHEMISTRY STD 9 question papers→ICSE Board STD 9 question papers→ICSE Board question paper generator→

Similar questions

Two elements $P$ and $Q$ belong to the same period of the modern periodic table and are in group $1$ and group $2$, respectively. Compare the following characteristics in the tabular form.
  1. Number of electrons in their atoms
  2. Their tendency to lose electrons
  3. Their metallic characters
  4. Formation of their oxides
  5. Formulae of their chlorides
→
Give its
(i) graphical representation,
(ii) mathematical expression
(iii) significance
→
Draw diagrams representing the atomic structures of the following:
  1. Sodium atom
  2. Chlorine ion
  3. Carbon atom
  4. Oxygen ion
→
Consider the following elements: Be, Li, Na, Ca, K. Name the elements of (a) same group (b) same period.
→
State the effects of greenhouse gases on the atmosphere.
→
${ }_{12}^{24} \mathrm{Mg}$ and ${ }_{12}^{26} \mathrm{Mg}$ are symbols of isotopes of magnesium.
(a) Compare the atoms of these isotopes with respect to:
i. the composition of their nuclei
ii. their electronic configurations
(b) Give reasons why the two isotopes of magnesium have different mass numbers.
→
What do you understand by the following terms?
→
Match the following:
Compound Formula
1. Boric acid i. $NaOH$
2. Phosphoric acid ii. $SiO_2$
3. Nitrous acid iii. $Na_2CO_3$
4. Nitric acid iv. $KOH$
5. Sulphurous acid v. $CaCO_3$
6. Sulphuric acid vi. $NaHCO_3$
7. Hydrochloric acid vii. $H_2S$
8. Silica (sand) viii. $H_2O$
9. Caustic soda (sodium hydroxide) ix. $PH_3$
10. Caustic potash (potassium hydroxide) x. $CH_4$
11. Washing soda (sodium carbonate) xi. $NH_3$
12. Baking soda (sodium bicarbonate) xii. $HCl$
13. Lime stone (calcium carbonate) xiii. $H_2SO_3$
14. Water xiv. $HNO_3$
15. Hydrogen sulphide xv. $HNO_2$
16. Ammonia xvi. $H_3BO_3$
17. Phosphine xvii. $H_3PO_4$
18. Methane xviii. $H_2SO_4$
→
Give the composition, causes, and effects of acid rain.
→
Explain Boyle's Law on the basis of the kinetic theory of matter.
→