Place the following covalent bonds in order from least to most polar: a. h-cl b. h-br c. h-s d. h-c

The Order is as follow,

                                     C-H < S-H < H-Br < H-Cl

Explanation:

                      Polarity depends on the electronegativity difference between two atoms, greater the electronegativity difference, greater will be the polarity of bond and vice versa.

Electronegativity Difference between Hydrogen and other given elements are as follow,

1) C-H;

               E.N of Carbon     = 2.55

               E.N of Hydrogen = 2.20

               Difference              0.35

2) S-H;

               E.N of Sulfur       = 2.58

               E.N of Hydrogen = 2.20

               Difference               0.38

3) H-Br;

               E.N of Bromine   = 2.96

               E.N of Hydrogen = 2.20

               Difference              0.76

4) H-Cl;

               E.N of Chlorine   = 3.16

               E.N of Hydrogen = 2.20

               Difference               0.96

Hence it is proved that the greatest electronegativity difference is found between H and Chlorine in H-Cl, therefore it is highly polar bond and vice versa.

answer: e.   sour taste

explanation: acids are those substances which dissociates in water to give ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. acids are sour in taste. example: hcl

bases are those substances which dissociates in water to give ions or accepts ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. bases are bitter in taste. bases are slippery in nature.

plasma is the state of matter where the substance is ionized and has no definite shape or volume. the fact of being ionized makes the substance a good electrical conductor.