Which of the following states is true? (a) q does not change with temperature. (b) q is the same as keq when a reaction is at equilibrium. (c) key does not change with temperature, whereas q is temperature dependent. (d) k does not depend on the concentration or partial pressures of reaction components. (e) q does not depend on the concentrations or partial pressures of reaction components.

Option (B) is the correct answer.

Explanation:

Q is defined as the reaction quotient which is equal to the concentration of products divided by the concentration of reactants.

Q can be measured at any condition of the reaction.

Whereas is the equilibrium constant and it is also equal to the concentration of products divided by the concentration of reactants. Also, is measured at equilibrium condition.

But at equilibrium, Q =

Also, there is no relation between Q and temperature.

Thus, we can conclude that the statement Q is the same as Keq when a reaction is at equilibrium, is true.

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alkaline metals are lithium, sodium, rubidium, potassium, cesium and francium.

alkali metals have electronegativity from 0.7 to 1, lowest in periodic table of elements, which means that alkali metals (i group in periodic table) has positive oxidation number in compounds.

electronegativity is a chemical property that describes the tendency of an atom to attract a shared pair of electrons towards itself.

alkaline metals (far left in main group) have lowest ionizations energy and easy remove valence electrons,

for example, potassium is the alkali metal and has a single valence electron in the outer electron shell.

electron configuration of potassium is: ₁₉k 1s²2s²2p⁶3s²3p⁶4s¹.

they can not exist alone in nature, because they are very reactive.