Structural representation of organic molecules

Explain the rules for writing fischer projection formula of stereoisomers.

How to represent conformational isomer using Newman projections.

How to represent the sawhorse conformation formula of a molecule?

Draw the complete formula of methane according to the structural model.

In Wedge-Dash notation for three-Dimensional representation of an organic molecule, the dashed bond represents.

State the hybridisation of carbon in ethene.

$\left(\mathrm{A}\right) \mathrm{sp}; \left(\mathrm{B}\right) {\mathrm{sp}}^2; \left(\mathrm{C}\right) {\mathrm{sp}}^3$.

Enter your correct answer as A, B or C.

The enantiomer on the left based on $\mathrm{D}/\mathrm{L}$ configuration is: _____-Erythrose.

How many pi bonds and sigma bonds are present in following molecule?

Give the structure of the following compound: 

 $1,1,1$-Trichloroethane

Give the structure of the following compound:

p-Dichlorobenzene

Give the structure of the following compound:

$1$-Chlorobutane

Give the structure of the following compound: 

$2$-Bromo-$3$-ethyl-$2$-methylhexane

Wedge-and-dash representation is used to show non-planar bonds in the ${\mathrm{CH}}_4$ molecule.

${\mathrm{CH}}_4 \mathrm{is} {\mathrm{sp}}^3$ hybridised molecule with tetrahedral geometry of bonds( Wedge-and-dash representation of ${\mathrm{CH}}_4$).

Draw the wedge-and-dash representation of ${\mathrm{CH}}_4$.

The _____  is used to depict the bond projecting out of the plane of the paper and away from the observer.

The above figure represents _____ ?

The above figure represents _____ ?

_____ is a drawing of a 3D molecule as a flat structure. The chiral carbons are represented by crossed lines.

The above picture represents _____ ?