List of top Environmental Chemistry Questions on General Chemistry asked in GATE ES

A researcher added a certain amount of HgCl2 to water at pH 10. He calculated the expected concentration of mercury in the water. He asked his student to measure the concentration. His student used an instrument that can measure only the free metal, Hg2+. The student observed that the concentration measured by him was significantly less than the concentration calculated by the researcher. How can he explain the paradox to the researcher?
Which one of the following statements is NOT correct?
Read the following statements:
I. Bacteriophage is an anaerobic bacterium.
II. Male-specific bacteriophage infect via the pili of other microorganisms including viruses.
III. Bacteriophage is found in human as well as in animal excreta.
IV. Bacteriophage cannot indicate the presence of bacteria.
The correct choice is:
Read the following statements:
i. In endogenous metabolism by aerobic bacteria, electron acceptor is present inside the cells.
ii. In endogenous metabolism by aerobic bacteria, electron acceptor is dissolved oxygen.
iii. The endogenous metabolism is linked to fermentative metabolism.
iv. In exogenous metabolism by aerobic bacteria, enzyme mediated electron transfer happens within the cells.
The correct choice is:
The correct ascending order of the following greenhouse gases with respect to their global warming potential relative to CO$_2$ in the time horizon of 100 years is:
- CH$_4$
- N$_2$O
- CFCl$_3$
- CF$_2$Cl$_2$
If $G$ represents Gibbs free energy, select the correct statement(s).