B.Tech Ranking

Yes, sure. You can get there. It is a good college and there is no problem of getting admission there. Moreover, you will get better opportunities over there in the field of nursing.

You have chances to get because they have reduced the shift, not seats.

No, you can't get admission in IET through lateral entry.

On the basis of your SC rank, there is 70% chance that you can get IET Lucknow, but surely you can get seat in:KNIT.
BIET
MJPRU
KIET

See, if you are a Delhi student then you can all the government colleges of Delhi like GB Pant, Okala; Ambedkar College, etc. And other than that, all the private colleges but if your resident of other state then you might not get any of the government college as because of the 85% and 15% quota of the Delhi students.

Thanks for asking your question. I think that choice filling is going on. If you are a general candidate then the chances are nil of getting a college. For OBC candidates, lower ranked NITs are possible but that too not sure. But if are SC/ST candidate, you have high chances of getting into good IIITs like Allahabad, Jabalpur, and Gwalior and NITs like MNNIT, Hamirpur, Kurukshetra, etc. Go through JoSAA website, check last year's ranks and fill your choices wisely.

Go through the link below for the list of probable colleges:
https://www.shiksha.com/b-tech/resources/comedk-college-predictor.

You can expect NITs since you are from SC category. Also some Tier 1 campuses like ITM and Jaypee. All these campuses have very good placement ranging from 4 LPA to 6 LPA.