Alkali metal hydrogen fluorides have a formula `M[HF_2]`. They are found to contain a linea

Alkali metals in each period have

All alkali metal superoxides contain the ion [O_(2)] . They are

Alkali metals displace hydrogen from water forming bases due to the reason that

All alkali metal peroxides contain the [-O-O]^(2-) ion. They are

The distance between the hydrogen atom and the fluorine atom in a hydrogen fluoride (HF) is 0.92 Armstrong. the mass of hydrogen atom is 1 a.m.u and mass of fluorine atom is 19 a.m.u the position of the centre of mass of the hydrogen fluoride molecule is

Assertion : Solubilities of alkali metal fluorides and carbonates increase down the group. Reason : Hydration energies of alkali metal halides decrease down the group with increase in size of cations.

Assertion (A): Alkali metals can form ionic hydrides which contain hydride ion, H. Reason (R ): The alkali metals have low EN. Their hydrides conduct electricity, when fused and liberate hydrogen at the anode.