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1
JEE Main 2019 (Online) 9th April Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Among the following species, the diamagnetic molecule is
A
CO
B
B2
C
O2
D
NO
2
JEE Main 2019 (Online) 9th April Evening Slot
MCQ (Single Correct Answer)
+4
-1
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The correct statements among I to III regarding group 13 element oxides are,
(I) Boron trioxide is acidic.
(II) Oxides of aluminium and gallium are amphoteric.
(III) Oxides of indium and thalliumare basic.
A
(II) and (III) only
B
(I), (II) and (III)
C
(I) and (III) only
D
(I) and (II) only
3
JEE Main 2019 (Online) 9th April Evening Slot
MCQ (Single Correct Answer)
+4
-1
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The maximum possible denticities of a ligand given below towards a common transition and inner-transition metal ion, respectively, are : JEE Main 2019 (Online) 9th April Evening Slot Chemistry - Coordination Compounds Question 285 English
A
8 and 6
B
8 and 8
C
6 and 8
D
6 and 6
4
JEE Main 2019 (Online) 9th April Evening Slot
MCQ (Single Correct Answer)
+4
-1
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Which one of the following about an electron occupying the 1s orbital in a hydrogen atom is incorrect ?

(The Bohr radius is represented by a0)
A
The probability density of finding the electron is maximum at the nucleus.
B
The electron can be found at a distance 2a0 from the nucleus
C
The total energy of the electron is maximum when it is at a distance a0 from the nucleus.
D
The magnitude of potential energy is double that of its kinetic energy on an average.

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