Shapes of Organic Molecules; σ & π Bonds (CIE AS Chemistry)

Methyl isocyanate, CH₃NCO, is a toxic liquid which is used in the production of adhesives. 

The sequence of atoms in a methyl isocyanate molecule is H₃C—N=C=O.

What is the approximate angle between the bonds formed by the N atom?

A synthetic molecule called N-acetylcysteine is used as an antidote for patients who have ingested too many paracetamol tablets.

The diagram shows part of the molecule N-acetylcysteine and bond angles have been labelled.

Which is the correct size order of bond angles x, y, z from smallest to largest?

A student is building a non-cyclic, chiral alkane from a molymod kit. What is the lowest number of carbon atoms they will need to include in the model? 

Methacrylate acrylonitrile is an organic molecule that contains carbons that are sp, sp², and sp³ hybridised. 

What is the most likely bond angle for carbon that is sp² hybridised?

The amino acid cysteine performs structural and functional roles within proteins. It is used as a nucleophile in enzymatic reactions and can form disulfide bonds with other cysteine molecules. 

How many carbon molecules in cysteine are sp² hybridised?

Limonene is found in the peel of citrus fruits.

How many σ and π bonds are present in this molecule?