GATE ES 2024 | Question: 6

Mon, 19 Feb 2024 10:24:13 +0000

Which one of the following conversions belongs to nonsymbiotic nitrogen fixation?

Atmospheric nitrogen to ammonia by Rhizobium bacteria in nodules attached to roots of legume
Atmospheric nitrogen to ammonia by Azotobacter
Nitrate to gaseous nitrogen under anaerobic condition
Nitrate to ammonia under aerobic conditions

GATE ES 2023 | Question: 33

Tue, 23 May 2023 03:12:07 +0000

Read the following statements

Trivalent chromium has relatively low aqueous solubility, and low mobility in the soil environment. By contrast, hexavalent chromium has a higher aqueous solubility and greater mobility in the soil environment.
The chemical reaction between trivalent chromium and zero-valent iron will result in transformed version called hexavalent chromium.
Hexavalent chromium is a known carcinogen.
Trivalent chromium has relatively higher human toxicity as compared to hexavalent chromium.

The correct choice is