Most common tumour of minor salivary glands is -
Muco epidermoid carcinoma
Mixed tumour
Squamous cell carcinoma
Epithelioma
75% of minor salivary gland tumors are malignant

Most common malignant tumors of minor salivary glands 

Adenoid cystic Ca (most common)
Mucoepidermoid Ca
Low grade polymorphous adenocarcinoma