The intermolecular forces which are present between the formaldehyde molecule and a chloroacetylene molecule, will be dipole -dipole interaction force.
Intermolecular force is a kind attraction force which will be occur between the one or more molecule. there are mainly 4 kind of intermolecular force.
Dipole-dipole interaction force will mainly occur in polar molecule where polarity generation. Due to polar molecule , a different kind of intermolecular force generated and that will be dipole-dipole interaction force. Formaldehyde molecule and a chloroacetylene molecule are one of them.
Therefore, the intermolecular force present in formaldehyde molecule and a chloroacetylene molecule, dipole-dipole interaction force.
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