The most basic oxide among \(V_2O_3, V_2O_4\) and \(V_2O_5\) is \(V_2O_3\)
\(V_2O_3 = V^{+3}(d^2)\)
Magnetic moment
\(=\sqrt {(2(2+2))}\)
\(=\sqrt 8\)
\(= 2.83\)
\(≈ 3\)
So, the answer is \(3\).
Given below are two statements:
Statement I: The number of species among \( SF_4 \), \( NH_4^+ \), \( [NiCl_4]^{2-} \), \( XeF_4 \), \( [PtCl_4]^{2-} \), \( SeF_4 \) and \( [Ni(CN)_4]^{2-} \), that have tetrahedral geometry is 3.
Statement II: In the set \( [NO_2] \), \( BeH_2 \), \( BF_3 \), \( AlCl_3 \), all the molecules have incomplete octet around the central atom.
In the light of the above statements, choose the correct answer from the options given below:
The following diagram shows a Zener diode as a voltage regulator. The Zener diode is rated at \(V_z = 5\) V and the desired current in load is 5 mA. The unregulated voltage source can supply up to 25 V. Considering the Zener diode can withstand four times of the load current, the value of resistor \(R_s\) (shown in circuit) should be_______ \(\Omega\).
Two point charges 2q and q are placed at vertex A and centre of face CDEF of the cube as shown in figure. The electric flux passing through the cube is : 
\[ \left( \frac{1}{{}^{15}C_0} + \frac{1}{{}^{15}C_1} \right) \left( \frac{1}{{}^{15}C_1} + \frac{1}{{}^{15}C_2} \right) \cdots \left( \frac{1}{{}^{15}C_{12}} + \frac{1}{{}^{15}C_{13}} \right) = \frac{\alpha^{13}}{{}^{14}C_0 \, {}^{14}C_1 \cdots {}^{14}C_{12}} \]
Then \[ 30\alpha = \underline{\hspace{1cm}} \]
A coordination compound holds a central metal atom or ion surrounded by various oppositely charged ions or neutral molecules. These molecules or ions are re-bonded to the metal atom or ion by a coordinate bond.
A coordination entity composes of a central metal atom or ion bonded to a fixed number of ions or molecules.
A molecule, ion, or group which is bonded to the metal atom or ion in a complex or coordination compound by a coordinate bond is commonly called a ligand. It may be either neutral, positively, or negatively charged.