An element X belongs to fourth period and fifteenth group of the periodic table. Which of the following statements is true?
It has completely filled s-orbital and a partially filled d-orbital.
It has completely filled s-and p -orbitals and a partially filled d-orbital.
It has completely filled s- and p-orbitals and a half filled d-orbital.
It has a half filled p -orbital and completely filled s-and d-orbitals.
The number of lone pairs of electrons on the central atoms of H2O, SnCl2, PCl3 and XeF2 respectively are
2, 1, 1, 3
2, 2, 1, 3
3, 1, 1, 2
2, 1, 2, 3
The correct order of decreasing H-C-H angle in the following molecule is
I> II> III
II> I> III
III> II> I
I> III> II
B.
II> I> III
H-C-H bond angle is about 120°, when C is bonded through a double bond but in case of CH4, the H-C-H bond angle is only 109° 28'. Cyclic compounds have a H-C-Hbond angle greater than 109° 28' due to hindrance. Thus, the correct order of H-C-H bond angle is
II>I>III
The correct order of decreasing length of the bond as indicated by the arrow in the following structures is
I >II > III
II > I > III
III > II > I
I > III > II
In SOCl2, the Cl-S-Cl and Cl-S O bond angles are
130° and 115°
106° and 96°
107° and 108°
96° and 106°
In diborane, the number of electrons that accounts for bonding in the bridges is
six
two
eight
four
The bond angle in NF3 (102.3) is smaller than NH4 (107.2). This is because of
large size of F compared to H
large size of N compared to F
opposite polarity of N in the two molecules
small size of H compared to N