How much of the total population of the world i percentage is living in South America ?

A. 7.2%
B. 6.5%
C. 5.6%
D. 6.7%

Which of the following countries is the world’s largest producer of coal ?

A. Russia
B. China
C. Pakistan
D. Usa

Races are breeding or mating population of people classified according to ?

A. Common origin
B. Genetically transmitted characteristics
C. Common language
D. Common religion

Cities and towns came into existence due to ?

A. Urbanization
B. Movement of population
C. Growth of agriculture
D. Development of commerce and trade

Which one of the following was the most important condition for the growth of the early cities ?

A. Discoveries of new trades
B. Increase in population
C. Surplus food production
D. Technological innovations

Which of the following crops needs maximum water per hectare ?

A. Barley
B. Maize
C. Sugarcane
D. None of these

Black volcanic soil and tropical climate is most suitable without excess rainfall for which crop ?

A. Jute
B. Tobacco
C. Cotton
D. None of these

The low heating capacity of which of the types of coal reduces its value as an industrial fuel ?

A. Anthracite
B. Bituminous coal
C. Lignite
D. Peat

The highest grade of coal whose surface is shining and has the highest calorific value is ?

A. Lignite
B. Peat
C. Bituminous
D. Anthracite

Which country is the biggest producer of mercury in the world ?

A. Mexico
B. Canada
C. Italy
D. Germany