"I don't think it is end of the tunnel. It is not like that. It does not happen (that way)", he told reporters, when asked whether RBI is nearing the end of the interest rate increase cycle.
The RBI on Tuesday hiked its key short-term lending and borrowing rates by 50 basis points to contain inflation which is nearing the double-digit mark.
Tuesday's rate hike by the Reserve Bank, 11th since March 2010, evoked sharp reaction from the industry which said the decision would hurt investment and pull down growth.
When asked whether he was surprised by the 50 basis points increase in key interest rates by the RBI, Mukherjee said, "I cannot say it surprised me. It is substantial no doubt, but given the situation it was necessary".
The RBI's decision is likely to make auto, home and corporate loans expensive and many banks have indicated that they would increasing their lending and deposit rates in response to the hike announced by the central bank.
Admitting that inflation at 9.4 per cent in June was "reasonably high and unacceptable", Mukherjee said it was a global phenomenon and the whole world was reeling under the impact of rising prices of fuel and other commodities.
The government and the central bank are taking steps to check price rise, he said, adding "I am optimistic that measures taken by the RBI by adjusting the crucial rate will have impact and inflation will come down".