Q3 of 20 Page 61

Match the pairs from ‘A’ and ‘B’ columns and explain the effect of pollution on human health.

Column ‘A’


1. Water containing cobalt


2. Methane gas


3. Water containing lead


4. Sulphur dioxide


5. Nitrogen dioxide


Column ‘B’


a. Mental retardedness


b. Paralysis.


c. Inflammation of lungs.


d. Skin cancer


e. Irritation of eyes

1. Water containing cobalt- b. Paralysis


Explanation: High concentration of cobalt in drinking water has shown to cause paralysis in humans.


2. Methane gas- d. Skin cancer


Explanation: Methane gas releases from industrial effluents are a important cause of skin cancer.


3. Water containing lead- a. Mental retardedness


Explanation: Lead is released in the water bodies by the industrial waste. The water consumed by children causes’ mental retardedness and other behavioural problems.


4. Sulphur dioxide- e. Irritation in the eye


Explanation: Sulphur dioxide is mainly released from factories which use coal and mineral oil as fuel. The smoke released from these factories causes irritation in the eye.


5. Nitrogen dioxide- c. Inflammation of lungs


Explanation: Oxides of nitrogen released from vehicular smoke are the main causes of lung and respiratory tract disorders.


More from this chapter

All 20 →
1

Following are some statements about pollution. Which type of pollution do those express?

a. Fog seems to be appearing in Delhi during day hours.


b. Many times, vomiting and dysentery occur after eating ‘panipuri’.


c. The problem of sneezing occurs sometimes during a visit to the garden.


d. The crop does not grow up in some areas.


e. People living in the busy squares face the problems like short breathing and other respiratory problems.

 2

Read the passage and identify the sentences expressing types of pollution.

Nilesh is a student of std. VIII and lives in the urban area. It takes about an hour to go to the school by bus. He faces the heavy traffic of two-wheelers, four wheelers, rickshaws, buses while going to school. He is facing the problem of asthma since last few days. Doctors recommended him to stay away from urban area. Since then, his mother sent him to the village of his maternal uncle. Nilesh saw the heaps of garbage at many places in the village. The foul smell of human and animal wastes was present in many places. Blackish water with foul smell was flowing in a stream. He developed some abdominal disease within a few days.

 4

True or false

a. Water does not get polluted by washing the cloths in running water of the river.


b. More the use of electric appliances more will be the pollution.

 5

Answer the following.

What is pollution?