Predict the shapes of the following molecules on the basis of hybridisation.

BCl₃, CH₄ , CO₂, NH₃

In compound BCl₃, Boron has sp²-hybridisation and the shape is Triangular Planar.

In methane CH₄, Carbon has sp³ -hybridization and shape are Tetrahedral.

In carbon dioxide CO₂, carbon has sp-hybridisation and shape is Linear.

In ammonia NH₃, nitrogen has sp³-hybridisation and shape is Pyramidal.