Which of the following sets is empty $?$

Set of counting numbers between $5$ and$6$.

Which of the following sets is empty $?$

Set of odd numbers between $7$ and $19$.

Which of the following sets is empty $:$

Set of odd numbers between $7$ and $9$.

Which of the following sets is empty $?$

Set of even numbers that are not divisible by $2$.

Which of the following sets is empty $?$

$\left\{0\right\}$

State which pair of sets given below are equal sets and which are equivalent $:$

$\{3, 5, 7\}$ and $\{5, 3, 7\}$

State which pair of sets given below are equal sets and which are equivalent $:$

$\{8, 6, 10, 12\}$ and$\{3, 2, 4, 6\}$

State which pair of sets given below are equal sets and which are equivalent 

State which pair of sets given below are equal sets and which are equivalent $:$

$\{2, 4, 6, 8, 10\}$ and $\{a, b, d, e, h\}$