Environmental Science In Agricultural MCQ Question and Answer | Agriculture MCQ Question

Aitken particles are activated in humid air, cloud's condensed nuclei and Hygroscopic particles.
Aitken particles have been defined as those airborne particles having radii less than 0.1 m but larger than those of molecules and small ions.
Those with a particle size between 5.0 × 10^-3 and 0.2 μm are called Aitken nuclei, those with a particle size from 0.2 to 1 μm are called large particles, and those with a particle size greater than 1 μm are called giant particles.

The main nitrogen reservoir in the biosphere is Atmosphere.
Atmosphere is a layer of gas or layers of gases that envelop a planet and is held in place by the gravity of the planetary body.
It is composed of nitrogen (78%), oxygen (21%), argon (0.9%), carbon dioxide (0.04%) and trace gases.

The air pollutants react with lead-based paints, causing decolouration in H₂S.
Lead is added to paint to accelerate drying, increase durability, maintain a fresh appearance, and resist moisture that causes corrosion. It is one of the main health and environmental hazards associated with paint.
The paint's lead carbonate reacts with hydrogen sulfide in the air and with acids, which often come from fingerprints.

Every person inhales air daily about 16 kg of.
Inhalation of air, as part of the cycle of breathing, is a vital process for all human life. The process is autonomic and does not need conscious control or effort.
Inhaled air is by volume 78% nitrogen, 20.95% oxygen and small amounts of other gases including argon, carbon dioxide, neon, helium and hydrogen.

The energy flows in an ecosystem is Multidirectional.
An ecosystem consists of all the organisms and the physical environment with which they interact. These biotic and abiotic components are linked together through nutrient cycles and energy flows.
Energy and carbon enter ecosystems through photosynthesis, are incorporated into living tissue, transferred to other organisms that feed on the living and dead plant matter, and eventually released through respiration.

Biogeochemical cycle would be affected if decomposers of an ecosystem vanish.
A biogeochemical cycle is a pathway by which a chemical substance cycles the biotic and abiotic compartments of Earth. The biotic compartment is the biosphere and the abiotic compartments are the atmosphere, hydrosphere and lithosphere.
The fast cycle includes annual cycles involving photosynthesis and decadal cycles involving vegetative growth and decomposition.

Most poisonous pollutant in water is Phosphate.
Water pollutants include contamination due to domestic wastes, insecticides and herbicides, food processing waste, pollutants from livestock operations, volatile organic compounds, heavy metals, chemical waste and others.
Phosphorus is an essential element for plant life, but when there is too much of it in water, it can speed up eutrophication of rivers and lakes.

Catalytic incinerators are advantageous as they require lower temperatures.
In a catalytic incinerator, the gas stream is introduced into a mixing chamber where it is also heated.
The waste gas usually passes through a recuperative heat exchanger where it is preheated by post combustion gas. The heated gas then passes through the catalyst bed.

The percentage of energy coming from the sun in re-radiated space is 30%.
In total approximately 70% of incoming radiation is absorbed by the atmosphere and the Earth's surface while around 30% is reflected in space and does not heat the surface.

Increased incidences of floods in the plains of North India are due to increased deforestation in catchment areas.
Deforestation or forest clearance is the removal of a forest or stand of trees from land that is then converted to a non-forest use.
Deforestation causes increases in temperatures and changes in the amount and distribution of rainfall generally creating a drier climate. These impacts can affect soil moisture, reducing yields in some areas and increasing flooding in others.