Explanation

The n + l rule helps determine the energy of orbitals, where n = principal quantum number and l = azimuthal quantum number.

For 3p orbital, n = 3 and l = 1, so n + l = 4, matching the given condition.

Explanation

"As many as" is used with countable nouns like species.

It emphasizes a large quantity — suitable here with "1,000 species."

Explanation

"Some" is used with uncountable nouns like "coffee" when making polite offers or requests.

"Can you please give me some coffee?" is grammatically and contextually correct.

Explanation

Cellulose is the main structural component of the primary cell wall in green plants.

It provides rigidity and support to the growing plant cells.

Explanation

Funaria is a moss, and mosses belong to the class Bryopsida.

It is a non-vascular, spore-producing plant typically found in moist, shady places.

Explanation

Cling means to hold on tightly.

Cede means to let go or surrender.

Cling means مضبوطی سے تھامنے کے لئے

Cede means جانے یا ہتھیار ڈالنے کے لئے

Explanation

The sentence follows a common comparative structure: "The + comparative, the + comparative" (e.g., The greater the demand, the higher the price).

"The higher" correctly completes this comparative cause-effect pattern.

Explanation

At 170°C, ethanol undergoes acid-catalyzed dehydration to form ethene (C₂H₄).

Concentrated H₂SO₄ acts as a dehydrating agent, removing water from ethanol.

Explanation

Maltose is made of two glucose molecules, so both structural units are the same.

Lactose = glucose + galactose (different units).

Sucrose = glucose + fructose (different units).

Explanation

Absorbance (A) is a logarithmic ratio of incident to transmitted light; hence, it is unitless.

In the Beer-Lambert law:

A=ε⋅C⋅L, only ε (molar absorptivity) carries units to balance the equation.