What do you mean by residuary powers?
Residuary powers can be termed as the powers that are not mentioned in any subject of the constitution. As per the Constitution, power is not present in all three lists. That is the list of Union, the list of State and nor in the Concurrent List. The residual subject is the authority or the power to execute a new subject.The Indian Constitution has divided the powers to the Centre and the various State Governments of India as per the Seventh Schedule of the Indian Constitution. The Seventh Schedule of the Indian Constitution consists of 3 lists and those are the Union list, the State list and the concurrent list. The central government holds the authority to frame the laws on the subjects that are present in the Central list.
In the same manner, the governments of various states in India hold the authority to frame the laws only based on the subjects that have been mentioned in the list of the Constitution of India. Presently, there are sixty-one subjects based on which the governments of various states can frame the laws as permitted by the Constitution of India. Apart from these two rights which the Central and the State governments of India hold respectively on various subjects, if there is any need to form some other policy as per the demand of the situation then such policies can be framed by the Central government of India. The policies framed based on the need of the situation by the Central Government of India are known as the residuary powers.