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.

Explanation

Ozonolysis splits the double bond and gives:

• CH₃CH₂COCH₃ (Butan-2-one)
• CH₃CHO (Acetaldehyde)

These products match the cleavage of 3-methyl-2-pentene at the double bond.

Explanation

Calcium propionate (CH₃CH₂COO⁻Ca⁺) and calcium acetate (CH₃COO⁻Ca⁺) undergo ketonic decarboxylation upon heating.

This reaction forms ethyl methyl ketone (butanone) and releases CO₂.

Explanation

The complex [Cu(en)2]^+² contains 2 ethylenediamine (en) ligands.

Each en is a bidentate ligand, donating 2 lone pairs, so:

2 ligands × 2 = 4 coordinate bonds → Coordination number = 4

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.

Explanation

Ethane thiol (R–SH) is more acidic than ethanol (R–OH) because the S–H bond is weaker and easier to ionize than the O–H bond.

Sulfur is larger and less electronegative, stabilizing the thiolate ion better than oxygen stabilizes the alkoxide.

Explanation

3-Hexanone is a ketone, and on oxidative cleavage with KMnO₄/H₂SO₄, it splits at the carbonyl group.

The cleavage yields acetic acid (CH₃COOH) and butanoic acid (CH₃CH₂CH₂COOH).

Explanation

Elements like Cr (24), Cu (29), and Mo (42) show irregular configurations due to extra stability of half-filled or fully filled d-orbitals.

Examples:

• Cr: [Ar] 3d⁵ 4s¹
• Cu: [Ar] 3d¹⁰ 4s¹
• Mo: [Kr] 4d⁵ 5s¹

Explanation

Pyridine has a lone pair on nitrogen that is not involved in resonance, making it readily available for donation.

In aniline and phenol, lone pairs are delocalized into the aromatic ring, reducing basicity.