List of top Environmental Sciences Questions

Arrange the following soil horizons as they occur from top to bottom:
Horizons:
A. O horizon
B. A horizon
C. B horizon
D. E horizon
E. C horizon
Choose the correct answer from the options given below:

Which of the following forest types occupies the largest area in India?

The coal mining carried out by landowners/local miners in Meghalaya state of India in the form of a long narrow opening is known as:

The monumental book ’Silviculture of Indian Trees’ is written by:

Water that got trapped during the formation of sedimentary rock is referred to as:

Organogenesis in humans takes place during:

Which of the following metal is bioaccumulative in nature but does not undergo biomagnification to cause adverse health effects?

Which of the following phosphate species does not exist in water?

Arrange the stages by which a species becomes invasive in an area:
A. Introduced
B. Established
C. Pest
D. Imported
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What will be the unit of equilibrium constant for the following reaction?
CH₃COCH₃ + HCN ⇌ CH₃C(OH)(CN)CH₃

A sample has an absorbance of 2. Its transmittance would be:

Match List I with List II:

LIST I (Aquaculture system)	LIST II (Potential Environmental Impact)
A. Coastal Pond	I. Transfer of diseases
B. Inland Pond	II. Introduction of exotic species
C. Mollusk Culture	III. Destruction of mangroves
D. Net Pen/Cage	IV. Degradation of land

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In sewage water, which of the following is expected to be present in the highest quantity (mg/L)?

Earthquakes occur in:

Match List I with List II:

LIST I	LIST II
A. Fragmentation	I. Degradation of detritus into simple inorganic substances by bacteria and fungi
B. Humification	II. Release of nutrients from humus by microbial action
C. Catabolism	III. Breakdown of detritus by earthworms into smaller particles
D. Mineralisation	IV. Dark coloured substances, highly resistant to microbial action

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What is the hardness of corundum in the Mohs scale of hardness?

Which of the following were the characteristics of the prebiotic primitive Earth?
Characteristics:

1. A. Presence of \( \text{CO}_2 \)
2. B. Presence of \( \text{CH}_4 \)
3. C. Presence of \( \text{H}_2\text{O} \) vapour
4. D. Presence of \( \text{O}_2 \)

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Which of the following microbial species are helpful in the denitrification process?
Microbial species:
A. Rhizobium sp
B. Achromobacter
C. Pseudomonas
D. Nitrosomonas
E. Azotobacter
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A geographical unit delineated by sharp gradients where precipitation or snowmelt flows along one side of the gradient, depending upon local topography and natural hydrology, is called:

The publication ’The Future We Want’ is the outcome of:

Photochemical smog formation in ambient atmosphere requires:
A. Volatile hydrocarbon
B. Ozone
C. SO2
D. Sunlight Temperature
E. NOx
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What is the plutonic equivalent of rhyolite?

Stratospheric ozone protects us from: