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

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

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

Explanation

Explanation

The sentence talks about a past event ("last birthday"), so past tense is needed.

"Were" is the correct past tense form of "are" for you.

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

The ABO blood group gene is located on chromosome number 9.

It codes for glycosyltransferase enzymes that determine blood type.