Explanation

It is the total heat content of a system when the pressure is constant.

It helps us understand energy changes in chemical reactions.

Explanation

 When a stem is cut, water and nutrients may ooze out due to root pressure, a positive pressure in the xylem generated by water absorption in roots.

Explanation

The percentage yield is the most common measure of efficiency in chemical reactions, comparing actual yield to theoretical yield.

Explanation

Water (H₂O) forms strong and extensive hydrogen bonds 

Due to its two hydrogen atoms and two lone pairs on oxygen.

Though HF forms strong individual bonds,

H₂O forms a dense hydrogen bonding network, making its bonding stronger overall.

Explanation

 The magnetic effect of electric current is the principle behind the operation of devices like motors.

When a current flows through a wire, it creates a magnetic field around it. In a motor, this magnetic field interacts with permanent magnets to cause a coil to rotate

This rotation then drives the motor. Electric fans utilize this principle to spin their blades. 

Explanation

When atomic orbitals (like s and p) mix to form hybrid orbitals (e.g., sp³, sp², sp),

The resulting orbitals have the same energy — they are degenerate.

This uniform energy level allows for equal bond strength and geometry, such as in methane (CH₄) with four sp³ orbitals.

Explanation

For an ideal gas, a graph of pressure (P) versus volume (V) at a constant temperature gives a hyperbolic curve, as described by Boyle's Law (PV = k).

This indicates an inverse relationship: as pressure increases, volume decreases, and vice versa.

However, if the graph is plotted between pressure (P) and the inverse of volume (1/V), it will be a straight line with a positive slope, passing through the origin

Explanation

The radius of an atomic orbital increases with the square of the principal quantum number (n).
So, larger values of n result in electrons being farther from the nucleus:

Radius∝n2

Explanation

 Cysteine is the only amino acid with a sulfhydryl group (-SH), which allows it to form disulfide bonds with another cysteine residue, creating a linkage between two polypeptide chains.

In insulin, disulfide bonds are crucial for maintaining its proper structure and function. 

Explanation

White phosphorus is highly toxic and reactive.

It can ignite spontaneously in air and is harmful to the liver and kidneys.

It’s the most dangerous form of phosphorus.