Most common tumour of minor salivary glands is -
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
Muco epidermoid carcinoma
Mixed tumour
Squamous cell carcinoma
Epithelioma