According to le chatelier’s principle, a change in pressure affects the chemical equilibrium of the reaction system under what condition?
the reactants and the products are in the solid phase.
the reactants and the products are in the liquid phase.
some of the reactants or the products are in the gaseous phase.
some of the reactants or the products are solid, and some are liquid.

  Some of the reactants or the products are in the gaseous phase.

Explanation:  Le cahtleir principle says that when a stress is been applied on the equilibrium system, the changes take place in a certain way that would decrease the stress of the equilibrium.

Thus, when pressure is applied to the system, it will move the equilibrium in the direction in which the pressure (stress) will decrease. Thus it will move in the direction in whih the number of moles of the species are getting reduced because pressure is inversly proportional to the volume and we can relate concentration as the number of moles divided by volume.

Thus increase in pressure will lead to the dcerease in volume and increase in number of moles.

And we tke only gaseous number of moles into consideration.

Thus option (c) is the correct answer.

state the principle of separating two immiscible liquids by separating funnel. describe an activity with diagram to separate a mixture of water and kerosene oil. answer: immiscible layers separate out in layers depending on their densities in separating funne

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.