  We present the results of a detailed analysis of multi-wavelength
observations of a very impulsive solar flare 1B/M6.7, which occurred on 10
March, 2001 in NOAA AR 9368 (N27 W42). The observations show that the flare is
very impulsive with very hard spectrum in HXR that reveal non-thermal emission
was most dominant. On the other hand this flare also produced type II radio
burst and coronal mass ejections (CME), which are not general characteristics
for impulsive flares. In H$\alpha$ we observed the bright mass ejecta (BME)
followed by drak mass ejecta (DME). Based on the consistence of the onset times
and direction of BME and CME, we conclude that these two phenomena are closely
associated. It is inferred that the energy build-up took place due to
photospheric reconnection between emerging positive parasitic polarity and
predominant negative polarity, which resulted as a consequence of flux
cancellation. The shear increased to $>80^o$ due to further emergence of
positive parasitic polarity causing strongly enhanced cancellation of flux. It
appears that such enhanced magnetic flux cancellation in a strongly sheared
region triggered the impulsive flare.
