Explanation

In the sentence, 'light' describes the noun 'affair', showing it's not serious—hence, it's an adjective.

Adjectives modify nouns to give more information about their quality or nature.

Explanation

Detritus food chain starts with dead organic matter (detritus), including decaying plant material.

Decomposers (like fungi, bacteria) and detritivores (like earthworms) feed on this material, converting it into simpler substances.

Explanation

In NH₄⁺, nitrogen has an oxidation state of –3 (typical for ammonia-like groups).

In NO₃⁻, nitrogen has an oxidation state of +5 due to its bonding with three oxygen atoms.

Explanation

Prussian blue is formed by a complex reaction involving Fe³⁺ (ferric) and [Fe(CN)₆]⁴⁻ (ferrocyanide) ions.

Both Ferric hexa cyano ferrate (II) and Iron (III) hexa cyano ferrate (II) describe the same compound responsible for the Prussian blue color.

Explanation

The phrase "at present" indicates an action happening right now, so present continuous tense is needed.

"Is reading" correctly shows the ongoing action with the subject 'She'.

Explanation

Meissner’s corpuscles are specialized mechanoreceptors that detect light touch and vibrations in the skin.

They are most abundant in fingertips, lips, and palms.

Explanation

Adipic acid has six carbon atoms with carboxylic acid groups at both ends — hence the name hexane-1,6-dioic acid.

It is a dicarboxylic acid.

It is widely used in the production of nylon.

Explanation

An ulcer is a gut disorder where the inner lining of the stomach or intestine becomes sore or eroded.

It often causes pain, bleeding, and discomfort, especially in the stomach or small intestine.

Explanation

Milk has a pH around 6.5, making it slightly acidic compared to bread and egg.

Eggs and bread are closer to neutral or slightly basic, especially egg whites.

Explanation

NH₄⁺ (ammonium ion) is formed by a coordinate covalent bond between nitrogen and an extra hydrogen.

Within NH₄⁺, atoms are bonded by covalent bonds.

NH₄⁺ and Cl⁻ are held together by an ionic bond.