1

IIT-JEE 1988

MCQ (Single Correct Answer)
The first ionisation potential of Na, Mg, Al and Si are in the order
A
Na < Mg > Al < Si
B
Na > Mg > Al > Si
C
Na < Mg < Al < Si
D
Na > Mg > Al < Si
2

IIT-JEE 1987

MCQ (Single Correct Answer)
The electronegativity of the following elements increases in the order
A
C, N, Si, P
B
N, Si, C, P
C
Si, P, C, N
D
P, Si, N, C
3

IIT-JEE 1987

MCQ (Single Correct Answer)
Atomic radii of fluorine and neon in Angstrom units are respectively given by
A
0.72, 1.60
B
1.60, 1.60
C
0.72, 0.72
D
None of these values
4

IIT-JEE 1987

MCQ (Single Correct Answer)
The first ionisation potential in electron volts of nitrogen and oxygen atoms are respectively given by
A
14.6, 13.6
B
13.6, 14.6
C
13.6, 13.6
D
14.6, 14.6

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