Question
When we talk about Demographic Transition, which Stage
is characterised with high birth rate, high number of deaths?Solution
Stage 1: Less developed countries, high birth rate, high number of deaths due to preventable causes, stable population Stage 2: Death rates fall due to improved public health but high fertility due to limited access to health and contraceptive services, spurt in population Stage 3: Birth rate also falls; population continues to grow due to large number of people in reproductive age group Stage 4: Stable population but at a level higher than the initial, low birth & death rates, high social & economic development
Water gas is the mixture of
Which type of fire extinguisher is used for petroleum fire?
The most abundant constituent of atmospheric air is
Chemical name of bleaching powder is
Ozone layer is present in
Burning pyrites ore gives out
Urea is a —
Which one of the following contributes largely to the greenhouse effect?
One property of ammonia is
In addition to hydrogen the other abundant element present on Sunsurface is