1
NEET 2022 Phase 2
MCQ (Single Correct Answer)
+4
-1

If first ionization enthalpies of elements X and Y are 419 kJ mol$$-$$1 and 590 kJ mol$$-$$1, respectively and second ionization enthalpies of X and Y are 3069 kJ mol$$-$$1 and 1145 kJ mol$$-$$1, respectively. Then correct statement is :

A
Both X and Y are alkaline earth metals
B
X is an alkali metal and Y is an alkaline earth metal
C
X is an alkaline earth metal and Y is an alkali metal
D
Both X and Y are alkali metals
2
NEET 2022 Phase 1
MCQ (Single Correct Answer)
+4
-1

The IUPAC name of an element with atomic number 119 is

A
ununennium
B
unnilennium
C
unununnium
D
ununoctium
3
NEET 2022 Phase 1
MCQ (Single Correct Answer)
+4
-1

Gadolinium has a low value of third ionisation enthalpy because of

A
small size
B
high exchange enthalpy
C
high electronegativity
D
high basic character
4
NEET 2021
MCQ (Single Correct Answer)
+4
-1
From the following pairs of ions which one is not an iso-electronic pair?
A
Fe2+, Mn2+
B
O2$$-$$, F$$-$$
C
Na+, Mg2+
D
Mn2+, Fe3+
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