Should I have to solve questions and OMR with hand gloves put on condition in neet2020?

Yes. Hand Gloves should be worn during the exam, NTA has released advisory for Students:

• Free masks wil be made available at the exam centers
• Students and Invigilators will be checked for temperature at the entry point
• To minimise the risk of the virus, there will be separate isolation rooms for Candidates showing the symptoms or those having above normal body temperature
• Regarding the self declaration form, It says that you do not have any COVID-19 symptoms and have not come in contact with anybody who has symptoms or has been tested positive in the recent past. You have to sign this form in the presence of the Invigilators. You will have to fill this form and sign it.
• The admit card is a 3 page pdf. Page 1 will have Exam centre details and self declaration form. Page 2 will  have Important exam Instructions to the Candidates. Page 3 will have Advisory for Candidates.
• Candidates will be given staggered reporting slots
• Candidates will be seated within a distance of 6 ft