Download App

Natural Resources — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceNatural Resources2 Marks
Question
Write a brief note on acid rain.
✓

Answer

When fossil fuels such as coal and petroleum products are burnt, they produce oxides of nitrogen and sulphur. On dissolving in rain these oxides form nitric acid and sulphuric acid respectively. This causes acid rain. These acids wash down into the soil and make it highly acidic, thus, affecting the growth of plants and ultimately the forest growth. It also affects the surface of buildings by eroding the stone and brick works.

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 "Que-Ans (Each of 2 Mark )" from Natural Resources→Natural Resources — all question types→Science STD 9 question papers→Gujarat Board STD 9 question papers→Gujarat Board question paper generator→

Similar questions

Classify the following into elements, compounds and mixtures: Marble, Air, Gold, Brass, Sand, Diamond, Graphite, Petroleum, Common salt, Sea-water, chalk.
→
How does perspiration or sweating help keep our body cool on a hot day?
→
Which of the following are chemical changes and which physical? Give reason.
  1. A glass bottle breaking.
  2. Coal burning in air.
  3. Making a cake.
  4. Wool being knitted into a sweater.
→
Calculate the change in momentum of a body weighing $5\ kg$ when its velocity decreases from $20\ m/s$ to $0.20\ m/s.$
→
An electric heater uses $600\ kJ$ of electrical energy in $5$ minutes. Calculate its power rating.
→
Through which of the following materials can sound travel? Wood, air, water, sream, ice, hydrogen, steel, diamond.
→
The composition of two atomic particles is given below:
 
X
Y
Protons
$8$
$8$
Neutrons
$8$
$9$
Electrons
$8$
$8$
  1. What is the mass number of $X$?
  2. What is the mass number of $Y$?
  3. What is the relation between $X$ and $Y$?
  4. Which element/ elements do they represent?
→
A body of mass $10\ kg$ is taken to the centre of the earth. What will be its mass there$?$
→
The velocity of a body of mass $10\ kg$ increases from $4\ m/s$ to $8\ m/s$ when a force acts on it for $2s.$
What is the value of the force$?$
→
A stone is thrown in a vertically upward direction with a velocity of 5ms-1. If the acceleration of the stone during its motion is 10ms–2 in the downward direction, what will be the height attained by the stone and how much time will it take to reach there?
→