Explanation

• Cauliflower is an immature, compact flower head (inflorescence) used as a vegetable.
• It consists of many undeveloped flower buds packed closely together.
• The edible part is mainly the fleshy, immature inflorescence.
• Cauliflower belongs to the family Brassicaceae, which also includes cabbage, broccoli, and mustard.

Last verified on 27-10-2026

Explanation

• Pinus is a gymnosperm that produces abundant yellow pollen grains, which may be released in large quantities during pollination.
• The yellow pollen falling from pine trees can resemble a shower of yellow powder, giving rise to the term “sulphur shower.”
• Pinus is wind-pollinated, so its lightweight pollen grains are carried by air currents.

Last verified on 27-10-2026

Explanation

• A phyllode is a flattened, leaf-like modified petiole that performs photosynthesis.
• In plants such as Acacia, the true leaves may be reduced, while the flattened petiole performs the leaf’s photosynthetic function.
• Phyllodes help reduce water loss in some plants adapted to dry environments.

Last verified on 27-10-2026

Explanation

• A facultative parasite normally lives as a parasite but can also survive independently as a saprophyte by obtaining nutrients from dead and decaying organic matter.

Additional information:

• An obligate parasite depends on a living host to complete its life cycle or survive and reproduce.
• A facultative saprophyte is the opposite: it normally lives on dead organic matter but can become parasitic under suitable conditions.

Last verified on 27-10-2026

Explanation

• Ringworm is a fungal infection caused by dermatophytes, including Microsporum, Trichophyton, and Epidermophyton.
• Despite its name, ringworm is not caused by a worm.
• It often produces a circular, red, itchy rash on the skin.
• The infection may affect the scalp, body, feet, or groin, depending on the site of infection.

Last verified on 27-10-2026

Explanation

• An irreversible reaction proceeds predominantly in the forward direction under the given conditions.
• A very large equilibrium constant (K) indicates that products are strongly favoured at equilibrium.
• A very small K indicates that reactants are favoured.

Last verified on 01-11-2026

Explanation

• The active mass (activity) of a pure solid or pure liquid is taken as 1 in equilibrium calculations.
• Its activity remains constant and is not included in the equilibrium constant expression.
• This convention applies to pure solids and liquids.

Last verified on 01-11-2026

Explanation

• The equilibrium constant (K) indicates the extent to which a reversible reaction proceeds toward products or reactants at equilibrium.
• A large K value means products are favoured, while a small K value means reactants are favoured.
• If K is approximately 1, appreciable amounts of both reactants and products are present at equilibrium.

Last verified on 01-11-2026

Explanation

• The solubility of most solid substances in liquids generally increases as temperature increases.
• For gases dissolved in liquids, solubility generally decreases with an increase in temperature.

Last verified on 01-11-2026

Explanation

• Concentration expresses the amount of solute present in a given amount of solution or solvent.
• Molarity and molality are specific ways of expressing concentration.
• Molarity is moles of solute per litre of solution.
• Molality is moles of solute per kilogram of solvent.

Last verified on 01-11-2026