In which year was the partition of Bengal scrapped?

The decision to effect the Partition of Bengal was announced in July 1905 by the Viceroy of India, Lord Curzon. The partition took effect in October 1905 and separated the largely Muslim eastern areas from the largely Hindu western areas. Indians were outraged at what they recognised as a "divide and rule" policy, where the colonisers turned the native population against itself in order to rule, even though Curzon stressed it would produce administrative efficiency. The partition animated the Hindus and led the Muslims to form their own national organization. Bengal was reunited in 1911.