1
AIPMT 2004
MCQ (Single Correct Answer)
+4
-1
The frequency of radiation emitted when the electron falls from n = 4 to n = 1 in hydrogen atom will be (Given ionization energy of H = 2.18 $$ \times $$ 10$$-$$18 J atom$$-$$1 and h = 6.625 $$ \times $$ 10$$-$$34 J s)
A
1.54 $$ \times $$ 1015 s$$-$$1
B
1.03 $$ \times $$ 1015 s$$-$$1
C
3.08 $$ \times $$ 1015 s$$-$$1
D
2.00 $$ \times $$ 1015 s$$-$$1
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 2004
MCQ (Single Correct Answer)
+4
-1
In a regular octahedral molecule, MX6 the number of X $$-$$ M $$-$$ X bonds at 180o is
A
three
B
two
C
six
D
four
4
AIPMT 2004
MCQ (Single Correct Answer)
+4
-1
Among the following, the pair in which the two species are not isostructural is
A
SiF4 and SF4
B
IO3$$-$$ and XeO3
C
BH4$$-$$ and NH4+
D
PF6$$-$$ and SF6
EXAM MAP