Which is not true regarding reaction rates? (2 points) catalysts are not used up in the reaction. catalysts speed up reactions by lowering the activation energy. reaction rates decrease as the concentration of reactants decrease. during reactions, concentrations of all reactants decrease at the same rate.

Let us consider each statement one by one

a) Catalysts are the substance which alter the reaction pathway where activation energy of reaction is less that the un catalyzed reaction. They are not used up in the reaction . the catalyst is restored in the reaction.

b) As mentioned above, the catalyst speed up reaction by lowering the activation energy

c) During a reaction the reactants are consumed up and products are formed. so there is a decrease in concentration of reactant.

Thus all the above statements are true.

D) the rate of decrease in concentration of reactants depends upon the coefficient of reactant in balanced chemical reaction.

For example

Here the rate of decrease in concentration of hydrogen will be double the rate of decrease in concentration of oxygen.

The correct answers are sunlight is bent at a smaller angle and the electrical conductivity of seawater decreases.

Explanation:

In seawater, the refraction angle changes according to salinity and temperature, becoming higher when salt concentration increases and temperature decreases.

The conductivity of water depends on the amount of salt dissolved in it. The electric current is caused by the movement of electrically charged particles and in response to the forces acting on these particles due to an applied electric field. Conductivity increases as the amount of solids dissolved in water increases. So if salinity decreases, does salinity.

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