List of top Physical Sciences Questions

Arrange the following in increasing the amount of nitrogen in the fertilizers:
(A). Ammonium sulphate,
(B). Ammonium nitrate,
(C). Ammonium chloride,
(D). Calcium ammonium nitrate

Choose the correct answer from the options given below:
Given below are two statements, one is labelled as Assertion (A) and other one labelled as Reason (R).

Assertion (A) : Gypsum is commonly used for the reclamation of sodic soil.
Reason (R) : Reclamation process involves reduction in exchangeable sodium with calcium and its removal from soil solution through leaching.

In light of the above statements, choose the correct answer from the options given below.
Given below are two statements, one is labelled as Assertion (A) and other one labelled as Reason (R).

Assertion (A) : Ammonium-based fertilisers are the major contributors to soil acidification.
Reason (R) : Especially the non-leachable nitrogen ions which have been taken up by plants contribute to the soil acidity.

In light of the above statements, choose the correct answer from the options given below.
Arrange the following in decreasing order according to the number of linkages among silicon tetrahedra of soil particles:
(A). Nesosilicates,
(B). Phyllosilicates,
(C). Tectosilicates,
(D). Inosilicates

Choose the correct answer from the options given below:
Given below are two statements, one is labelled as Assertion (A) and other one labelled as Reason (R).

Assertion (A) : Intense weathering of soil shifts its Zero Point Charge towards higher pH owing to greater accumulation of iron and aluminum oxides.
Reason (R) : The application of organic matter in soil also pushes the soil Zero Point Charge towards higher pH.

In light of the above statements, choose the most appropriate answer from the options given below.
Given below are two statements, one is labelled as Assertion (A) and other one labelled as Reason (R).

Assertion (A) : Implementing agroforestry practices helps in soil conservation.
Reason (R) : Agroforestry combines the cultivation of trees and crops on the same land, which reduces soil erosion by providing ground cover and enhancing soil structure through the roots of trees.

In light of the above statements, choose the most appropriate answer from the options given below.
Given below are two statements, one is labelled as Assertion (A) and other one labelled as Reason (R).

Assertion (A) : Manganese deficiency in plants primarily affects the photosynthetic process.
Reason (R) : Manganese is a cofactor for several enzymes involved in the photosynthetic electron transport chain, facilitating electron transfer reactions within chloroplasts.

In light of the above statements, choose the most appropriate answer from the options given below.
Who first observed that legumes can utilize atmospheric nitrogen?
Which of the following is/are the example of nitrifying bacteria?
The amount of organic matter in a soil with 'Value 0' according to Munsell colour system is-
The most common 1:1 type of clay mineral in soil is-
The pF range of soft or friable consistency of soil is-
The $\text{O}_\text{a}$ sub-horizon denotes-}
Which of the following nutrient is related with deficiency symptoms like discoloration of leaf buds, breaking and dropping of buds?
According to Bray's Nutrient Mobility concept, which among following element is mobile in plants but immobile in soil?
Trees and shrubs commonly planted in rows at right angles to the prevailing winds are called:
Which statement is correct for the following structures 1 and 2?
Statement (I): Black gram as a cover crop to reduce surface runoff and soil loss during rainy seasons.
Statement (II): Black gram as a live mulch crop to reduce surface runoff and soil loss during rainy seasons.
In light of the above statements, choose the most appropriate answer from the options given below.
The Environment Protection Act was enacted in the year:
Example of a secondary pollutant is:
Indicate which pair of sugars consist of epimers
(A). D-glucose and D-mannose
(B). D-Ribose and D-ribulose
(C). D-galactose and D-glucose
(D). D-glyceraldehyde and Dihydroxyacetone
Choose the correct answer from the options given below:
Which statement about M-phase cyclin is correct
Endosulphan belongs to group:
Options 1-4 are the different combinations of botanical pesticides. Which combination is a correct representation of the botanical pesticide Cinerin -II
1. Chrysanthemic acid + cinerolone
2. Pyrethric acid + cinirolone
3. Chrysanthemic acid + Pyrathrolone
4. Pyrethroic acid + Pyrethrolone
Match List-I with List-II
Choose the correct answer from the options given below:
Contaf is a trade name of: