Which of the following statements are false?

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${BeCl}_{2}$ is a linear molecule in the vapors state but it is polymeric form in the solid state

Calcium hydride is called hydrolith

Carbides of both Be and Ca react with water to form 'acetylene

Oxides of both Be and Ca are amphoteric

answer is A.

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Detailed Solution

Covalent bonds characterise beryllium chloride. Each Be atom in ${BeCl}_{2}$ is surrounded by four $Cl$ atoms, and the compound has a polymeric chain structure in its solid form.

Acetylene gas and calcium hydroxide are produced when calcium carbide interacts with water. Calcium carbide is not flammable and is not soluble in any known solvent.

Since calcium oxide ( $CaO$ ) is a basic oxide and combines with acid to form salt and water, it is not an amphoteric oxide.

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