General Questions in English

(A) The correct matching is as follows:
$1$. Cohesion $(P)$: It refers to the mutual attraction between water molecules $(III)$.
$2$. Adhesion $(Q)$: It refers to the attraction of water molecules to polar surfaces,such as the walls of tracheary elements $(II)$.
$3$. Surface Tension $(R)$: It explains why water molecules are attracted to each other more in the liquid phase than in the gaseous phase $(I)$.
Therefore,the correct sequence is $(P-III), (Q-II), (R-I)$.

(A) The $Apoplastic$ pathway involves the movement of water through the cell walls and intercellular spaces,which offers little resistance to water flow.
In contrast,the $Symplastic$ pathway involves the movement of water through the cytoplasm and plasmodesmata,which is slower due to the resistance offered by the cell membranes and cytoplasm.
Therefore,the $Apoplastic$ pathway is faster than the $Symplastic$ pathway.

(C) The $symplast$ pathway involves the movement of water and solutes through the interconnected protoplasts of plant cells.
This movement occurs from one living cell to another via $plasmodesmata$.
The $transmembrane$ pathway is also considered a part of the $symplast$ system as it involves crossing cell membranes.
In contrast,the $apoplast$ pathway involves the movement of water through the non-living parts of the plant,such as cell walls and intercellular spaces.
Therefore,movement along the intercellular space is characteristic of the $apoplast$ pathway,not the $symplast$ pathway.

(A) The correct matching is as follows:
$i$. Gravitational water: Water that moves down through the soil due to gravity and percolates deep into the soil $(i-c)$.
$ii$. Hygroscopic water: Water that is tightly held by soil particles through adsorption and is not available to plants $(ii-a)$.
$iii$. Combined water: Water present in the form of hydrated oxides of silicon or aluminium,which is chemically bound to soil particles $(iii-d)$.
$iv$. Capillary water: Water held in the pores between soil particles by capillary forces,which is the primary source of water for plants $(iv-b)$.
Thus,the correct sequence is $i-c, ii-a, iii-d, iv-b$.

(D) Water is a vital inorganic compound that acts as a universal solvent.
$i$. Water exists as a liquid at room temperature,which allows it to flow through xylem and phloem.
$ii$. Due to its polar nature,it acts as an excellent solvent for minerals and organic solutes.
$iii$. Pure water has a $pH$ of $7$,which is neutral.
$iv$. Water is not inert; it is highly reactive and participates in many metabolic reactions,such as photosynthesis and hydrolysis. Therefore,all the given statements are correct.

(A) The correct matching is as follows:
$(a)$ Capillary water: This is the water held in between small non-colloidal soil particles by capillary forces,which is available to plants $(a)-(iii)$.
$(b)$ Hygroscopic water: This is the water held tightly around soil particles by adhesive forces,making it unavailable to plants $(b)-(iv)$.
$(c)$ Combined water: This is the water present in the form of hydrated oxides of Silicon and Aluminum,which is chemically bound and unavailable to plants $(c)-(i)$.
$(d)$ Gravitational water: This is the water that moves down through large pores between soil particles due to gravity and reaches the water table,making it unavailable to plants $(d)-(ii)$.
Therefore,the correct sequence is $(a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)$.

(C) The water held in the fine pores or spaces between soil particles due to surface tension is known as $Capillary$ water.
This water is held against the force of gravity and is the primary source of water available for absorption by plant roots.
$Hygroscopic$ water is held tightly by soil particles and is unavailable to plants.
$Gravitational$ water drains away due to gravity and is also generally unavailable to plants.
Therefore,the correct answer is $Capillary$ water.