Patricia A. King, the first woman to serve on the board of directors of the D.C. Redevelopment Land Agency (RLA), has been appointed its chairwoman by Mayor Walter E. Washington.

King is associate professor of law at Georgetown University and a former deputy director of the civil rights office of the U.S. Department of Health, Education and Welfare.

A member of the RLA board since 1976, King succeeded retiring chairman Alfred P. Love, whose term on the board expired.

To fill the vacancy created by Love's departure from the five-member board, the mayor nominated Alfred H. Liu., an architect and urban planner. Liu has designed residential, commercial and public buildings in Washington and elsewhere.

The RLA board makes decisions about the use and disposition of property acquired by the city for urban renewal. Formerly a federal agency, the RLA is now administratively part of the D.C. Department of Housing and Community Development.

Appointments to the board are subject to City Council confirmation. The chairperson is appointed by the mayor from among members previously confirmed.

The mayor also nominated Shari B. Kharasch for a second three-year term on the D.C. Board of Elections and Ethics, of which she is now chairwoman. Board membership is subject to council confirmation. Kharasch, whose term expires at the end of this month, will continue to serve until action is taken on her renomination.

Mayor Washington also nominated Edward J. Austin, president of the Daco Fuel Oil Co. and a former banker, for membership on the D.C. General Hospital Commission. His term would run until October 1979.

Austin is a former member of the D.C. Minimum Wage and Industrial Safety Board and a former mayor of the resort community of Highland Beach, Md.

The mayor appointed and swore in 19 persons to serve on the city's new Mental Health Advisory Council, which will review the city's annual plans for federal funding of mental health programs and advise officials on related matters. The initial members will serve staggered terms of one to three years.

Those chosen were: Lynne List, Edie Maeda, Debra Shore, Dr. Robert Butler, the Rev. Annie Woodridge, the Rev. Lee Calhoun, Margaret King, Daisey Lewis, Velvin Dabney, Phyllis Martin, Veronica Browne, Gottlieb C. Simon, Patricia Wells, Geraldine Smith, Mary Kidd, Dr. Jefferson McAlpine, Dr. Ricardo Galbis, Everett Crawford and Dr. Zelda B. Elder.