1
IIT-JEE 1998
MCQ (Single Correct Answer)
+2
-0.5
Read the following Assertion and Reason and answer as per the options given below

Assetion: LiCl is predominantly a covalent compound

Reason : Electronegativity difference between Li and Cl is too small
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
2
IIT-JEE 1998
MCQ (Single Correct Answer)
+2
-0.5
The geometry and the type of hybrid orbital present about the central atom in BF3 is
A
linear, sp
B
trigonal planar, sp2
C
tetrahedral, sp3
D
pyramidal, sp3
3
IIT-JEE 1998
MCQ (Single Correct Answer)
+2
-0.5
ASSERTION:
Nuclide $${}_{13}^{30}Al$$ is less stable than $${}_{20}^{40}Ca$$

REASON:
Nuclides having odd number of protons and neutrons are generally unstable.
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 1998
MCQ (More than One Correct Answer)
+2
-0.5
The energy of an electron in the first Bohr orbit of H atom is -13.6 eV. The possible energy value(s) of the excited state(s) for electrons in Bohr orbits of hydrogen is (are)
A
-3.4 eV
B
-4.2 eV
C
-6.8 eV
D
-1.5 eV
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