Whenever by will, deed, or other instrument, a power to sell, mortgage, lease or otherwise dispose of or deal with property shall be given to any one or more fiduciaries, the power, whether discretionary or otherwise, shall be construed to be appurtenant to the fiduciary office and shall pass to and be exercisable by any surviving or successor fiduciary, unless an intention to the contrary is expressly declared in the will, deed, or other instrument.