Explanation

Higher activation energy makes it harder for reactants to form products, thus slowing down the reaction.

Other factors like concentration, temperature, and catalysts all increase reaction rate.

Explanation

In a magnetic field, alpha (α) and beta (β) particles are deflected in opposite directions due to opposite charges.

So, if deflection occurs in one direction, the radiation must be either α or β rays, not both.

Explanation

A positive electrode potential (E°cell > 0) indicates the reaction can occur spontaneously.

Hence, the process is feasible or spontaneous in nature.

Explanation

In 1-butene-3-yne (CH₂=CH–C≡CH), there is one double bond and one triple bond.

A double bond = 1 σ + 1 π, a triple bond = 1 σ + 2 π → total 7 σ and 3 π bonds.

Explanation

BF₃ has a trigonal planar structure where the bond dipoles cancel each other.

Hence, it has a zero dipole moment, making it nonpolar.

Explanation

For n = 3 and l = 2, the subshell is 3d.

A d-subshell can hold a maximum of 10 electrons (since it has 5 orbitals × 2 electrons each).

Explanation

A compound shows optical activity when it has at least one asymmetric (chiral) carbon atom.

This carbon is attached to four different groups, allowing the molecule to rotate plane-polarized light.

Explanation

Second ionization energy is the energy to remove a second electron.

After losing one electron:

K⁺ becomes stable like Ar, so removing another electron needs very high energy (lowest effective IE₂).

Ca⁺ has one unpaired 4s electron → easier to remove than K⁺ but harder than Ba⁺.

Ba⁺ (6s¹) is larger and less tightly bound.

So, overall trend: Ca > Ba > K.

Explanation

The C–H bond length depends on the hybridization of the carbon atom.

In C₂H₆ (ethane), carbon is sp³ hybridized, giving the longest C–H bond (~1.09 Å).

Explanation

Starch is a polysaccharide made up of repeating units of α-D-glucose.

It consists of amylose and amylopectin, both formed by α(1→4) and α(1→6) glycosidic linkages.