Match the following columns:

Column I (Available nutrients)	Column II (Extractant)
a. Boron	1. 0.15% Cacl2 Solution
b. Nitrogen	2. Hot water
c. Sulpher	3. Alkaline KMNO4

Solution(By Examveda Team)

a. Hot water is the extractant of Boron.
Boron is extracted with near-boiling deionized water on a heating block. Boron in the extract is reacted with curcumin to form an orange-coloured complex. The concentration of B is determined colorimetrically or by UV-Vis spectrophotometry. Each chemical compound should be treated as a potential health hazard.
b. Alkaline KMnO₄ is the extractant of Nitrogen.
The easily hydrolyzable and oxidisable fractions of organic nitrogen present in a soil sample can be extracted using alkaline KMnO₄ - a mild oxidizing agent.
c. 0.15% Cacl₂ solution is the extractant of Sulphur.
0.15% CaCl₂ extracted S in the range of 13.00 to 26.50 mg kg^-1, with a mean value of 19.26 mg kg^-1. The lowest amount of S (mean value of 8.21 mg kg^-1) has been extracted by 0.001 M HCl with a range of 3.75 to 14.25 mg kg^-1.