Career
She also served as Raja Permaisuri Agong of Malaysia from 20 September 1975 to 29 March 1979. Tengku Zainab married Sultan Yahya Petra ibni Almarhum Sultan Ibrahim Petra of Kelantan on 4 June 1939, who at the time held the title of Tengku Temenggung. She was given the title Tengku Ampuan Mahkota (conferred on the consort of the Crown Prince) by Sultan Ibrahim on 9 August 1956.
On the same day she was conferred the South.P.M.K. Order.
Tengku Zainab was conferred the Darjah Kerabat (Denmark – Royal Family Order) on the first anniversary of Sultan Yahya Petra’s installation. She served as Raja Permaisuri Agong of Malaysia during her husband"s reign as Yang di-Pertuan Agong from 1975 to 1979.
Tengku Zainab accompanied Sultan Yahya Petra on his official visits to several countries which gave her the opportunity to fulfill her responsibility as the Raja Perempuan and the Raja Permaisuri Agong. Tengku Zainab was a kind person who loved doing charity work.
She was once the president of various social organisations such as the Girl Guides of Kelantan and the Women's Institution.
Tengku Zainab gave special attention to ‘house-keeping’ such as decorating the palace and preparing food for the royal family. She also loved doing handicraft, collecting antiques and gardening. Tengku Zainab died on 10 January 1993 at the state palace at the age of 75.