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JEE Main Ultimate Online Test Series - 2027
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1
JEE Main 2021 (Online) 17th March Morning Shift
MCQ (Single Correct Answer)
+4
-1
The absolute value of the electron gain enthalpy of halogens satisfies :
2
JEE Main 2021 (Online) 16th March Evening Shift
MCQ (Single Correct Answer)
+4
-1
The characteristics of elements X, Y and Z with atomic numbers, respectively, 33, 53 and 83 are :
3
JEE Main 2021 (Online) 16th March Evening Shift
MCQ (Single Correct Answer)
+4
-1
Identify the elements X and Y using the ionisation energy values given below :
| Ionization energy (kJ/mol) | ||
|---|---|---|
| 1$${st}$$ | 2$${nd}$$ | |
| X | 495 | 4563 |
| Y | 731 | 1450 |
4
JEE Main 2021 (Online) 26th February Evening Shift
MCQ (Single Correct Answer)
+4
-1
Which pair of oxides is acidic in nature?
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