Chemistry Test 204

Salicylic acid gives wintergreen smell with methyl alcohol and H₂SO₄ to form Methyl salicylate.

Benzyl alcohol does not have the CH₃CO- group or CH₃CH₂O^- so it will not give the positive iodoform test.

Phospholipids are esters of glycerol with two carboxylic acid residue and one phosphate group. Hence, phospholipids may be regarded as derivative of glycerol in which two hydroxyl group are esterified with a fatty acid, while third is esterified with phosphoric acid.

In graphite, each carbon atom uses only 3 of its 4 outer energy level electron in covalently bonding to there other carbon atoms in a place. In graphite, electrons are spread out between the structure.

Splitting of spectral lines under the influence of magnetic field is called Zeeman effect.

In stark effect spectral lines split due to electricity.

In photoelectric effect the splitting of spectral line takes place as the light falls on the metal.

It has got sp2 hybridization, giving it a planar structure.Further backbonding from flouine makes the B-F bonds stronger than normal single bonds.

XeF₂ contains sp³d hybridized Xe atom with three lone pairs of electrons.

Fluorine atoms occupy axial positions while three lone pairs of electrons occupy equatorial positions in trigonal bipyramid.

Since the lone pair of electrons does not consider for the shape of the molecule, thus, the shape of XeF₂ comes out to be linear.

While C -atom of CO₂ is sp hybridised and thus, possesses a linear shape.