Explanation

Explanation

Explanation

• Copper has two common oxidation states: +1 (cuprous) and +2 (cupric).
• In CuO, copper is +2 (Cu²⁺) → cupric oxide.
• In CuBr, copper is +1 (Cu⁺) → cuprous bromide.
• CuCl₂ and CuSO₄ also have copper in +2 state.
• The +1 state is more stable with less electronegative elements like bromine.

Explanation

Explanation

• A meso compound has two or more chiral centers.
• It possesses an internal plane of symmetry.
• Due to symmetry, it is optically inactive.
• The optical activities of chiral centers cancel each other.
• Example: meso-tartaric acid.

Last updated question 17-02-2026

Explanation

Formation of H₂O (H₂ + O₂ → H₂O) is practically irreversible under normal conditions.

Explanation

Lithium (Li) and Magnesium (Mg), Magnesium (Mg) and Aluminium (Al) show a diagonal relationship in the periodic table

Where elements in adjacent groups and periods have similar properties.

Explanation

• Copper exhibits +2 oxidation in CuO and CuSO₄.
•  In Cu₂O, it shows +1 oxidation.
•  Cu²⁺ is common in compounds.
•  It forms stable salts with sulfate and oxide ions.
•  Essential in many biological enzymes.

Last updated question 17-02-2026

Explanation

•  Linoleic acid is an essential fatty acid.
•  Humans cannot synthesize it.
•  It must come from diet.
•  Important for cell membranes.
•  Found in vegetable oils and nuts.

Explanation

Curd is a classic example of a gel in colloid chemistry,

It is formed by the coagulation of proteins.

Structure: Solid protein network (casein) trapping liquid whey.

Similar Examples: Cheese, jelly, butter, and gelatin