Mercury has the highest surface tension due to strong cohesive forces.

Glycerol is a thick liquid and has a higher viscosity compared to the others.

Benzene has a lower boiling point compared to water, ethanol, and hexane.

Benzene is a non-polar liquid, while the others are polar.

Hexane is a non-polar solvent, while the others are polar.

Ethanol can form strong hydrogen bonds due to the presence of an -OH group.

Ethanol has a lower surface tension compared to water and mercury due to its molecular structure.

Zinc is used as the anode in a Daniell cell.

Aluminum is commonly used as an anode in electrolysis due to its high reactivity.

Copper cannot be used as an anode in a galvanic cell because it is less reactive than zinc.

According to the Aufbau principle, the σ1s molecular orbital is filled first as it has the lowest energy.

σ2s is lower in energy than the 2p atomic orbitals.

Ozone (O3) exhibits resonance due to the delocalization of electrons.

H2O has two bonding pairs and two lone pairs, leading to a bent molecular geometry.

H2O has two bonding pairs and two lone pairs, leading to a bent molecular geometry.

Li2 has a bond order of 1, calculated as (2 bonding electrons - 0 antibonding electrons)/2 = 1.

N2 has a bond order of 2, calculated as (number of bonding electrons - number of antibonding electrons)/2 = (10-6)/2 = 2.

O2 has a bond order of 2, while N2 has a bond order of 3, so none have a higher bond order than N2.

N2 has a bond order of 3, while O2 has a bond order of 2, so N2 has a higher bond order.

CO2 has a linear shape due to the arrangement of its double bonds.

PCl5 has five bonding pairs and no lone pairs, leading to a trigonal bipyramidal geometry.

N2 has a triple bond, consisting of one sigma bond and two pi bonds.

N2 has the highest bond order of 3, calculated as (10 bonding electrons - 2 antibonding electrons)/2 = 3.

F2 is diamagnetic as it has all electrons paired in its molecular orbitals.

C2 is isoelectronic with N2, both having 10 electrons.

N2 is isoelectronic with Ne, both having 10 electrons.

Ammonia (NH3) is polar due to its trigonal pyramidal shape and the presence of a lone pair on nitrogen.

Li2 is stable with a bond order of 1, while He2 and Be2 are not stable.

The 3s orbital has the highest energy among the given options due to its higher principal quantum number.

Fluorine has the highest electronegativity among all elements.