Which of the following chemical equations is balanced?
a. Zn + HCI —— ZnCl2 + H2
b. 2 Zn + 2 HCI —ZnCl2 + H,
c. 2 Zn + HCI – ZnCl2 + H2
d. Zn + 2 HCI – ZnCl2 + H2

Option d. Zn + 2HCI –> ZnCl2 + H2

Explanation:

First let us generate a balanced equation to know which of the above is balanced.

This is illustrated below:

Zn + HCl —> ZnCl2 + H2

There are 2 atoms of H on the right side and 1 atom on the left side. It can be balance by putting 2 in front of HCl a shown below:

Zn + 2HCl —> ZnCl2 + H2

Now we can see clearly that the equation is balanced as there are equal numbers of atoms of the different elements present on both sides of the equation.

Now let us check for the above equation in the options given in question.

3 hours because it is a decent distance.

vanderwaal's forces of attraction are the electrostatic intermolecular forces that exist in a molecule due to the temporary or permanent dipoles that are developed in a molecule. in , the major intermolecular forces are dipole-dipole interactions as the molecule is polar (bent structure). so the vanderwaal's forces of interaction in between molecules are the permanent dipole-dipole interactions that develop due to the dipole that exists in between the polar h - s bond. the positively charged hydrogen atom is attracted towards the negative end of the dipole that is sulfur of the adjacent molecule. therefore, these forces of attraction are relatively stronger than that of london dispersion forces that exist in non polar molecules.