Bonds present in $CuSO_4 \cdot 5H_2O$ are

Which of the following molecules contains both ionic and covalent bonds?

Considering ethene molecule,which of the following statements is/are correct?
$I$. $C-C$ bond is formed by overlapping of $sp^2-sp^2$ hybrid orbitals.
$II$. $C-H$ bond is formed by overlapping of $sp^2-s$ orbitals.
$III$. $p\pi-p\pi$ bond is present.
$IV$. $H-C-H$ bond angle is greater than $H-C-C$ bond angle.
$V$. Nodal plane of $\pi$ bond and molecular plane are same.

Which of the following orders is incorrect $:-$

Which of the following orders is not correct?

Match the scientists given in List-$I$ with their discoveries given in List-$II$.

List-$I$	List-$II$
$(1)$ Kossel and Lewis	$(A)$ $VSEPR$
$(2)$ Langmuir	$(B)$ Molecular Orbital Theory
$(3)$ Sidgwick and Powell	$(C)$ Covalent Bond
$(4)$ Heitler and London	$(D)$ Octet Rule
$(5)$ $F$. Hund and Mulliken	$(E)$ Valence Bond Theory