Structure of Amines

Describe the shape of aliphatic amines.

The geometry of the molecules of amines is 

Organic compound containing carbon, hydrogen and nitrogen, can be either amine or nitrile. How many amine isomers are possible with molecular formula ${\mathrm{C}}_4{\mathrm{H}}_{11}\mathrm{N}?$

$$Total number of undefinedamines present in the given compound is :

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How many secondary amines are possible with the formula C₅H₁₃N.

The number of primary amines of formula ${\mathrm{C}}_4{\mathrm{H}}_{11}\mathrm{N}$ is (only structural)

The compound given below forms secondary amines when the substituents are:

Consider an ion with the following structure: [H₂C=C=NH₂]⁺. For this ion, we can define two planes: one plane containing H-C-H group, the other plane contaning H-N-H group. What is the relationship between these planes ?