Ferric hydroxide is not an alkali although it is a metallic hydroxide. Why?

answer:

According to low solubility constant of iron (III) hydroxide (6.3 x 10-38) it is not soluble in water (at room or high temperature). Despite of amphoterism of iron (III) hydroxide it does not produce [Fe(OH)4]- ions in alkaline medium as Al(III), Zn(II), Cr(III) and Sn(IV) ions. For this reason Fe(III) belongs to subgroup of the insoluble hydroxides. For more details see at: Svehla, G. Qualitative Inorganic Analysis, 7th ed.; Pearson Education: New Delhi, 2006.

mark as brainliest please

answer:

The alkali metal hydroxides are the strongest of all bases. The order of basicity increases down the group, i.e., LiOH is the least basic and CsOH, the most basic hydroxide. It is due to the property of bases to donate OH−

ion and due to small size and high lattice enthalpy of Li, it donates less OH−

and large size and low lattice enthalpy of Cs, Cesium hydroxide donates more OH−

ions than any other hydroxide. All the alkali metal hydroxides are white crystalline solids and dissolve freely in water with evolution of much heat.

Explanation:

- calcium has greater affinity to bond with electron receptors than hydrogen does and hence, it has the ability to replace hydrogen in most of its compounds.

- lithium has 2 valence electrons in the product because it can make only 1 bond with hydrogen. beryllium has 4 valence electrons in the product because it can only make 2 bonds. it has fewer electrons than neon and can react with electron donors. each hydrogen has 2 valence electrons, the same as helium.

- the covalent bond formed between carbon and hydrogen is polar because carbon is more electronegative than hydrogen and it attracts the bonded electron pair closer to itself, thus giving hydrogen a partial positive charge.

- a hydrogen bond is a relatively weak bond that hydrogen atoms make with the electronegative atoms nitrogen, oxygen or fluorine.

so the best choice is a.) 2 calcium (ca) atoms