Three questions can be challenged to get bonus marks for those questions

1.chemisty. That colloid question must be given as bonus as it had two options to be correct. So many might have left that question fearing negative marks

2. Physics. That magnetic field inside the cylindrical conductor question. They didn’t mention whether it is hollow or solid cylinder. So I considered it as hollow one(by default) and considered magnetic field inside hollow cylinder to be zero and marked that option. But Nta has considered it be solid cylinder. Whose mistake is this. Why should students get affected. It's better they give bonus marks to that question instead. As even single mark is important in determining rank of candidate

3. Physics. That voltmeter and ammeter question. If you don't consider it as ideal. We will get different answer. So I hope Nta gives bonus as it is their fault

I request students who got confused in these questions to challenge these questions to get bonus marks as even a single mark can be a deciding factor.

Thanks.