The chemical formula of magnesium pyrophosphate is ${\mathrm{Mg}}_2{\mathrm{P}}_2{\mathrm{O}}_7$. The formula of ferric pyrophosphate will be

(i) ${\mathrm{CH}}_3-\mathrm{CH}={\mathrm{CH}}_2$

(ii) ${\mathrm{CH}}_3-\mathrm{CH}=\mathrm{CH}-{\mathrm{CH}}_3$

If the number of atoms lying in one plane for${\mathrm{CH}}_3-\mathrm{CH}={\mathrm{CH}}_2$ is $\mathrm{x}$ and for ${\mathrm{CH}}_3-\mathrm{CH}=\mathrm{CH}-{\mathrm{CH}}_3$ is $\mathrm{y}$, then the ratio of $\mathrm{x}:\mathrm{y}$ is:

A compound ${\mathrm{AB}}_{\mathrm{x}}{\mathrm{L}}_{\mathrm{y}}$ with ${\mathrm{sp}}^3\mathrm{d}$ hybridization of $\mathrm{A}$ has $\mathrm{T}-$shape. What is the shape of the molecule, if $\mathrm{A}$ forms ${\mathrm{AB}}_{\mathrm{y}}{\mathrm{L}}_{\mathrm{x}}$ type?

($\mathrm{L}=$ Lone pair)

Among the following molecules, which has atleast three atoms in the same plane?

a. ${\mathrm{CH}}_4$

b. ${\mathrm{BF}}_3$

c. ${\left({\mathrm{CH}}_3\right)}_3\mathrm{N}$                     

The species, which can have all atoms in the same plane is/are:

$\mathrm{a}. {\mathrm{H}}_2{\mathrm{SO}}_4$

$\mathrm{b}. {\mathrm{H}}_2\mathrm{O}$

$\mathrm{c}. {\mathrm{HNO}}_3$

$\mathrm{d}. {\mathrm{CCl}}_4$

In which of the following compounds, all the carbon atoms are in the same hybridized state?

$\mathrm{a}.$ ${\mathrm{C}}_2{\mathrm{H}}_2$

$\mathrm{b}.$ ${\mathrm{C}}_2(\mathrm{CN}{)}_4$

$\mathrm{c}.$ ${\mathrm{C}}_2(\mathrm{CN}{)}_2$

$\mathrm{d}.$ $\mathrm{CH}\equiv \mathrm{C}-\stackrel{\stackrel{\mathrm{O}}{\parallel }}{\mathrm{C}}-\mathrm{OH}$