Question : Nitrification is the biological process of converting.

Option 1: Nitrogen into nitrate

Option 2: Nitrogen into nitrite

Option 3: Ammonia into Nitrite

Option 4: Ammonia into NItrogen

Question : Which of the following gases is known as "laughing gas"?

Option 1: Nitrous oxide

Option 2: Nitrogen peroxide

Option 3: Nitrogen

Option 4: Nitric oxide

Question : The elements known as primary nutrients for plants are:

Option 1: nitrogen, phosphorus and potassium

Option 2: nitrogen, oxygen and silicon

Option 3: potassium, boron and nitrogen

Option 4: nitrogen, phosphorous and iron

Question : The atmospheric layer farthest from the Earth's surface is known as

Option 1: Stratosphere

Option 2: Exosphere

Option 3: Ionosphere

Option 4: Mesosphere

Question : Nitrogen fixation is a process of

Option 1: assimilation of nitrate

Option 2: utilisation of nitrogen gas

Option 3: conversion of organic nitrogen to proteins

Option 4: conversion of molecular nitrogen to ammonia