List of top Environmental Sciences Questions

Organogenesis in humans takes place during:
There are several instances where the DNA of the bacteriophage resides inside the bacterial cell without replication and virus generation. The process of co-existence of the bacterium and phage DNA is known as:
Which of the following phosphate species does not exist in water?
When ice starts melting from 0°C to 8.5°C, its density will:
What will be the unit of equilibrium constant for the following reaction?
CH3COCH3 + HCN ⇌ CH3C(OH)(CN)CH3
Partial pressure of nitrogen gas (N2) in the atmosphere will be:
Which of the following metal is bioaccumulative in nature but does not undergo biomagnification to cause adverse health effects?
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
Choose the correct answer from the options given below:
Which of the following codons are called nonsense codons?
Cooking pans made from which of the following metals would need less heat to achieve a certain cooking temperature?
Match List I with List II:
LIST I (Experiment)LIST II (Conclusion)
A. Photoelectric effectI. Ether medium does not exist
B. Michelson-MorleyII. Light is made up of photons
C. Stern-GerlachIII. Quantization of electronic orbit
D. Franck-HertzIV. Electron spin moment
Choose the correct answer from the options given below:
Arrange the following II B (or 12) group elements in the increasing order of their Pauling electronegativities:
Elements:
A. Zn
B. Hg
C. Cd
Choose the correct answer from the options given below:
What will be the molar concentration of ammonium ion in a 100 ppb ammoniacal solution?
In which of the following pairs of chemical species does sulfur (S) not have the same oxidation number?
Which of the following chemical species will dominantly exist in water having a pH of less than 5?
What is the hardness of corundum in the Mohs scale of hardness?
Match List I with List II:
LIST ILIST II
A. FeldsparI. Halide
B. GypsumII. Silicate
C. AzuriteIII. Carbonate
D. HaliteIV. Sulfate
Choose the correct answer from the options given below:
Which of the following minerals have platy crystal habit?
Minerals:
A. Muscovite
B. Sillimanite
C. Asbestos
D. Biotite
Choose the correct answer from the options given below:
What is the plutonic equivalent of rhyolite?
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 \( \text{O}_2 \)
Choose the correct answer from the options given below:
In the asthenosphere, the velocity of S-waves in partly molten rocks:
A. Increases
B. Decreases
C. Remain Constant
D. First increases then decreases
Choose the correct answer from the options given below:
Water that got trapped during the formation of sedimentary rock is referred to as:
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:
Identify the correct statements:
Statements:
A. Eddy diffusion is a dominant mixing process in the stratosphere.
B. Height of the troposphere at poles is less than that over the equator.
C. Mean free path of molecules in the mesosphere is longer than that in the troposphere.
Choose the correct answer from the options given below:
Earthquakes occur in: