If a given forward reaction is exothermic and the reactants and products in a flask initially are at equilibrium, what will happen when the temperature is raised?

A. The system will shift to the right (in the direction of the forward reaction).

B. The system will shift to the left (in the direction of the reverse reaction).

C. The system will not shift.

D. The rates of both the forward and reverse reactions immediately decrease.

B. The system would shift  to the left ( in the direction of the reverse reaction).

Explanation:

Since the reaction system is exothermic (meaning it releases heat during the process), increasing the temperature will shift the equilibrium to the left, according to Le Charteliers's Principle so as to annul the effect of the contraint (heat) added to the system.

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.

there is none because earth is stationary and flat.