1
IIT-JEE 2000 Screening
MCQ (Single Correct Answer)
+1
-0.25
The correct order of radii is
A
N < Be < B
B
F- < O2- < N3-
C
Na < Li < K
D
Fe3+ < Fe2+ < Fe4+
2
IIT-JEE 2000 Screening
MCQ (Single Correct Answer)
+1
-0.25
Amongst H2O, H2S, H2Se and H2Te, the one with the highest boiling point is
A
H2O because of hydrogen bonding
B
H2Te because of higher molecular weight
C
H2S because of hydrogen bonding
D
H2Se because of lower molecular weight
3
IIT-JEE 2000 Screening
MCQ (Single Correct Answer)
+2
-0.5
Read the following statement and explanation and answer as per the options given below

ASSERTION : The first ionization energy of Be is greater than that of B.

REASON : 2p orbital is lower in energy than 2s.
A
If both assertion and reason are CORRECT, and reason is the CORRECT explanation of the assertion
B
If both assertion and reason are CORRECT, and reason is not the CORRECT explanation of the assertion
C
If assertion is CORRECT, but reason is INCORRECT
D
If assertion is INCORRECT, but reason is CORRECT
4
IIT-JEE 2000 Screening
MCQ (Single Correct Answer)
+2
-0.5
Molecular shape of SF4, CF4 and XeF4 are
A
the same, with 2, 0 and 1 lone pair of electrons
B
the same, with 1, 1 and 1 lone pair of electrons
C
different, with 0, 1 and 2 lone pairs of electrons respectively
D
different, with 1, 0 and 2 lone pairs of electrons respectively
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