Which of the following compounds would be expected to be least destructive to the ozone layer?

select one:

a. dichlorodifluoromethane
b. chlorodifluoromethanc. trichlorofluoromethane
d. 1,1,2,2-tetrachloro-1,2-difluoroeth ane


C) The compound that has the smallest ions with the greatest charge.
Hope this helps you!
B) is the correct option


Succinate dehydrogenase is the smallest component of electron transport chain and consists of four different subunits including FAD, 3 Fe-S centers It catalyzes oxidation of succinate to fumarate and electrons released transferred to ubiquinoneSuccinate dehydogenase transfer electrons from succinate to ubiquinone via FADH2 thus this complex directly links tricarboxylic acid cycle to electron transport chainActivity of succinate dehydrogenase is inhibited by malonate which is a competitive inhibitor as a result oxidation of succinate to fumarate will not occur and hence concentration of fumarate will decrease  
A. 2-phosphoglycerate


Glycolysis is the process of breakdown of  glucose into two 3-carbon molecules called pyruvate. The energy released during glycolysis is used to make ATP.

Enolase is the enzyme  which plays very important role in glycolysis. In the 9th step of glycolysis, Enolase converts  2-phosphoglycerate into phosphoenolpyruvate.

This reaction of conversion of  2-phosphoglycerate to phosphoenolpyruvate is a reversible dehydration reaction.

Fluoride inhibits enolase, so when enolase is become non-functional then there is no convertion of 2-phosphoglycerate  to phosphoenolpyruvate, so the concentraion of 2-phosphoglycerate is increases by the addition of fluoride.



because it is ionic compound so it will conduct electricity

hope it helps

B; NaF because it is a ionic compound


First off, just looking at A and C, you can eliminate them because they are inherently false statements:

A) NaF is not covalent; it is ionic because it is made up of a metal (Na) and a nonmetal (F)

C) CH4 is not ionic; it is covalent because it is solely made up of nonmetals (C and H)

Now, a property of ionic compounds is that when they are either molten (melted) or dissolved, they melt in water. Covalent compounds are NOT good conductors of electricity.

Thus, B (NaF because it is a ionic compound) is the answer.


3) the compound that has the smallest ions with the greatest charge


-Because metallic elements tend to lose electrons and nonmetallic elements tend to gain electrons, a pair of contrasting elements will exchange electrons so that both achieve stable electronic configurations. The resulting ions of opposite charge have a strong force of electrostatic attraction, which is called an ionic bond. This bond forms through the complete transfer of electrons from one atom to another, in contrast to the electron sharing of the covalent bond.

-The charge on the ions and the size of the ions involved determine the strength of ionic bonds. Generally the higher the charge on the ions the greater the attraction between the ions and therefore the greater the strength of the bond. The increased attraction between the ions leads to higher melting and boiling points.

  The   compound  that  would  be   most   reactive  is   Ethyne  (answer A)


   Ethyne   is the  most    unsaturated  among the four  compounds  ( it  has a triple bond between  the two carbon atoms) .
The  triple  bond in ethyne   is made up  of 1  sigma  bond  and  2π   bond.The 2π  bond  are  weaker   and can  easily break   which  make  Ethyne  more  reactive than  Ethene, methane  and Ethane.

Option (c) is the correct answer.


A positive charge is attracted towards a negatively charged ion and the force with which they are attracted towards each other is electrostatic force of attraction.

According to coulomb's law, force is directly proportional to the product of charges and inversely proportional to the square of distance between them.

Mathematically,          F \propto \frac{q_{1}q_{2}}{r^{2}}

Therefore, smaller is the size of ions greater will be its charge and more strong the ions will be held together.

Thus, we can conclude that the compound that has the smallest ions with the greatest charge would be expected to have the strongest ionic bonds.

Compound that has the smallest ions with the greatest charge.

Explanation: Ionic compounds are formed by the combination of positively charged cations and negatively charged anions held together by electrostatic forces.

According to Coulombic:

Force\propto \frac{q_1q_2}{r}

where q_1 and q_2 are the charges and r is the distance between the two charges

As force is directly proportional to charges and inversely proportional to distance between charges, strongest forces will be there when charges are greatest and sizes are small.

6.B. NADPH and 8.B. ETHYNE

Do you know the answer?

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