Rawat notched up a 25-23 21-10 victory over second seed Ashish Sharma to clinch the men's singles title, while Nidhi stunned second seed Shreya Aggarwal 21-15 19-21 21-7 to claim the women's title.
Nidhi also clinched the women's doubles title when she along with her partner Shreya Aggarwal saw off Yamini Sharma Shraddha Shrivastava in straight games.
The top seed pair of Nidhi and Shreya outwit the second seeded combo of Yamini and Shraddha 21-15 21-13.
In men's doubles competition, top seeds Himanshu Kharbanda and Tanvir Gill beat Nitin Mahiwal and Srikant Bakshi 21-16 21-14 to claim the title.
In mixed doubles event, top seeded pair of Abhishek Ahlawat and Sanskriti Chhabra prevailed over Himanshu Kharbanda and Priyanka Arya 21-7 21-13 to make the title their own.