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1
AIPMT 2005
MCQ (Single Correct Answer)
+4
-1
Which one of the following arrangements represents the correct order of electron gain enthalpy (with negative sign) of the given atomic species ?
A
S < O < Cl < F
B
Cl < F < S < O
C
F < Cl < O < S
D
O < S < F < Cl
2
AIPMT 2004
MCQ (Single Correct Answer)
+4
-1
Ionic radii are
A
inversely proportional to effective nuclear charge
B
inversely proportional to square of effective nuclear charge
C
directly proportional to effective nuclear charge
D
directly proportional to square of effective nuclear charge.
3
AIPMT 2003
MCQ (Single Correct Answer)
+4
-1
The ions O2$$-$$, F$$-$$, Na+, Mg2+ and Al3+ are isoelectronic. Their ionic radii show
A
a significant increase from O2$$-$$ to Al3+
B
a significant decrease from O2$$-$$ to Al3+
C
an increase from O2$$-$$ to F$$-$$ and then decrease from Na+ to Al3+
D
a decrease from O2$$-$$ to F$$-$$ and then increase from Na+ to Al3+.
4
AIPMT 2002
MCQ (Single Correct Answer)
+4
-1
Which of the following order is wrong?
A
NH3 < PH3 < AsH3 $$-$$ acidic
B
Li < Be < B < C $$-$$ 1st IP
C
Al2O3 < MgO < Na2O < K2O $$-$$ basic
D
Li+ < Na+ < K+ < Cs+ $$-$$ ionic radius.
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