Explanation

Super glue (cyanoacrylate) quickly bonds metals and non-porous materials like jewelry.

It forms a strong, clear, and instant adhesive joint.

Explanation

Boron has an electron in the 2p orbital, which is dumbbell-shaped.

H and He have only s-orbitals, while Li’s outer electron is also in an s-orbital.

Explanation

Vinyl acetylene has the structure CH₂=CH–C≡CH.

The double bond starts at carbon 1 and the triple bond at carbon 3 — hence But-1-en-3-yne.

Explanation

0.053 nm - This is the Bohr radius for a hydrogen atom.

It represents the most probable distance of an electron from the nucleus in the ground state.

Explanation

Energy is absorbed to form the activated complex.

This increases the potential energy of reactants before forming products.

Explanation

Carbon (⁶C) has two unpaired electrons in the 2p orbital.

More unpaired electrons mean stronger paramagnetism.

Explanation

Acetyl chloride (CH₃COCl) is most susceptible to nucleophilic attack.

Because the Cl atom is highly electronegative and a good leaving group, making the carbonyl carbon more positive and reactive.

Explanation

In SN² reactions, reactivity depends on how easily the leaving group departs.

I⁻ is the best leaving group and F⁻ is the poorest, so the order is RI > RBr > RCl > RF.

Explanation

The compound CHCCl contains a triple bond between two carbons (ethyne structure) and one chlorine atom attached.

Hence, its IUPAC name is Chloroethyne.

Explanation

Because yield % = (Actual ÷ Theoretical) × 100 = (2 ÷ 4) × 100 = 50%.