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

Question : Microbial degradation of nitrates into atmospheric nitrogen is known as:

Option 1: Ammonification

Option 2: Nitrification

Option 3: Denitrification

Option 4: Putrefaction

Question : The pair of compounds used as anaesthetic in medicines :

Option 1: Ether, Ammonia

Option 2: Nitrous oxide, Chloroform

Option 3: Chloroform, Nitrogen dioxide

Option 4: Nitrogen dioxide, Ether

Question : The commonly used coolant in refrigerators is

Option 1: Ammonia

Option 2: Nitrogen

Option 3: Freon

Option 4: Oxygen

Question : Direction: Which one of the given responses is the meaningful order of the following?

1. Infancy     2. Adult      3. Puberty       4. Childhood

Option 1: 1, 2, 3, 4

Option 2: 1, 4, 2, 3

Option 3: 1, 3, 4, 2

Option 4: 1, 4, 3, 2