ICAR-AIEEA-UG Practice Quiz

Question 1

A soil sample has bulk density $1.35\,\text{Mg m}^{-3}$ and particle density $2.65\,\text{Mg m}^{-3}$. The total porosity of the soil is closest to:

Accepted Answer

$49\%$

Question 2

Which of the following plant hormones is primarily associated with breaking seed dormancy and promoting germination in many cereals?

Accepted Answer

Gibberellic acid

Question 3

A farmer applies urea containing $46\%$ nitrogen. How much urea is required to supply $92\,\text{kg}$ of nitrogen?

Accepted Answer

$200\,\text{kg}$

Question 4

In Mendel's dihybrid cross involving two independently assorting genes, the phenotypic ratio in the $F_2$ generation is:

Accepted Answer

$9:3:3:1$

Question 5

The half-life of a first-order reaction is $20\,\text{min}$. The rate constant $k$ is approximately:

Accepted Answer

$0.0347\,\text{min}^{-1}$

ICAR-AIEEA-UG