How can ethene be produced from ethanol?

Addition of $Br_2$ to $cis$-$2$-butene would give a product which is

$but-2-yne$ is reacted separately with one mole of $H_2$ as shown below:
$\underline{ B } \xleftarrow[\text{liq } NH_3]{Na} CH_3-C \equiv C-CH_3 \xrightarrow[\Delta]{Pd/C} \underline{ A }$
Identify the incorrect statements from the options given below:
$A.$ $A$ is more soluble than $B$.
$B.$ The boiling point and melting point of $A$ are higher and lower than $B$ respectively.
$C.$ $A$ is more polar than $B$ because dipole moment of $A$ is zero.
$D.$ $Br_2$ adds easily to $B$ than $A$.

During the ozonolysis of $CH_2 = CH_2$,if hydrolysis is performed in the absence of $Zn$ dust,the product obtained will be ...............

Assertion $(A)$: Reaction of but$-1-$ene with $HBr$ gives $1-$bromobutane as major product.
Reason $(R)$: Addition of hydrogen halides to alkenes proceeds according to Markownikoff's rule.
The correct answer is

Explain the hybridization of carbon and the bond structure of ethene $\left( C_2H_4 \right)$ $OR$ Explain: Ethene is a planar molecule.