Garbage in, garbage out Worksheet-4
The table below shows the source and the amount of some pollutant gases produced by human activities:
Which one of the following statements is correct?
(a) Carbon dioxide is produced by industries
(b) Hydrocarbons are produced by vehicle exhaust gases only.
(c) The total sulphur dioxide and nitrogen dioxide produced per year is 145 million tonnes.
(d) The combined total pollutant gases produced by nitrogen oxide and hydrocarbons, is less than the total produced by sulphur dioxide.
(a) melting of Himalayan Glaciers
(c) increased biochemical oxygen demand
(d) increase in average temperature of the earth
(a) decrease in amount of dissolved oxygen in water
(b) increase in fish population
(c) deposition of calcium phosphate
(d) enhanced growth of algae
(a) Amount of carbon dioxide in the atmosphere is 0.03%
(b) pH of rain water is 5.6
(d) Biochemical oxygen demand 10 ppm
(a) Ozone hole is thinning of ozone layer of stratosphere at some places.
(b) Ozone hole is a hole formed in the troposphere from which ozone oozes out.
(c) Ozone hole means vanishing of ozone layer around the earth completely.
(d) Ozone hole is a hole formed in stratosphere from which ozone oozes out.
(a) Hydrocarbon (b) CO
(c) O3 (d) NO
(a) oxides of nitrogen are formed but they are unstable.
(b) the reaction between them is endothermic (requires high energy)
(c) the reaction can be initiated only in presence of a catalyst.
(d) All of these
(a) Hydrosphere (b) Troposphere
(c) Stratosphere (d) Mesosphere
(a) Increase in the amount of dissolved oxygen.
(b) Large number of mosquitoes.
(c) Decrease in the amount of dissolved oxygen in water.
(d) Clogging of gills by mud.
(a) Ozone is a strong oxidising agent
(b) Ozone hole is thinning of ozone layer present in the stratosphere.
(c) Ozone layer is not responsible for green house effect.
(d) Ozone is produced in upper stratosphere by the action of UV rays on oxygen.