81.

Geometry of ${\mathrm{SiO}}_4^{4-}$ anion is

• tetrahedral

• trigonal

• trihedral

• pentagonal

Chlorine (Cl¹⁷) free radical contains how many electrons around the nucleus?

• 16

• 17

• 18

• 19

The atomic number of Sn is 50. The shape of gaseous SnCl₂ molecule is

• Cl-Sn-Cl

• 

• 

• 

The central carbon atom of a free radical contains

• 6 electrons

• 7 electrons

• 8 electrons

• 10 electrons

Reaction for the formation of NaCl is

• Na(g) + Cl₂(g) → NaCl(s)

• Na(s) + $\frac{1}{2}$Cl₂(g) → NaCl(s)

• Na(g) + $\frac{1}{2}$Cl₂(g) → NaCl(s)

• Na(g) + Cl₂(g) → NaCl(g)

The hybridization state of C atom in butendioic acid is

• sp²

• sp³

• Both (a) and (b)

• sp

Which of the following has least bond energy?

• N${}_2^{2-}$

• N${}_2^{-}$

• N${}_2^{+}$

• N₂

Which of the following species has highest bond energy?

• O${}_2^{2-}$

• O${}_2^{+}$

• O${}_2^{-}$

• O₂

Which of the following is least hydrolysed?

• BeCl₂

• MgCl₂

• CaCl₂

• BaCl₂

The geometry of I${}_3^{-}$ is

• triangular

• linear

• tetrahedral

• T-shape